COMPARE
Compare Gill products
Start with the problem, then compare the options side by side.
You do not need to know our product names. Pick what you are trying to measure, and each table shows what every option is best for, when to choose it, and how the specifications compare. Prefer to answer questions instead? The product finder does the narrowing for you.
START WITH THE PROBLEM
What are you trying to measure?
Wind
Inside the machine
Only one answer
Each table starts with what every option is best for and when to choose it, then lines up the specifications. Tables scroll sideways on a small screen. Not stated means the datasheet does not give the figure.
WIND
Wind speed and direction on masts, buildings and vehicles
The everyday job. The choice comes down to how strong the wind gets, how much space and weight you have, and whether you want a compass built in.
| Best for | General wind monitoringWindSonic | Storm-force windsWindSonic 75 | Small, light or mobileWindUltra | Wind with a built-in compassGMX200 |
|---|---|---|---|---|
| Choose it when | You need reliable wind speed and direction and the site does not need heating or special approvals. | Winds above 60 m/s are part of the site, but you do not need a heated stainless sensor. | Space or weight is tight: drones, uncrewed vessels, vehicles, or anywhere the sensor needs IP68 and IP69K protection. | You want a wind station with an integrated compass and optional GPS, for example on a vehicle. |
| Wind speed range | 0 to 60 m/s (116 knots) | 0 to 75 m/s (146 knots) | 0 to 75 m/s (168 mph, 270 km/h) | Not stated |
| Wind speed accuracy | 2% RMSE @ 12 m/s | ±2% RMSE @ 12 m/s | <2% RMSE or 0.1 m/s (0 to 20 m/s); <3% RMSE (>20 m/s) | Not stated |
| Wind direction range | 0-360° (no dead band) | 0-360° (no dead band) | 0-360° | Not stated |
| Wind direction accuracy | 2° RMSE @ 12 m/s | ±2° RMSE @ 12 m/s | <1° RMSE (0 to 20 m/s); <2° RMSE (>20 m/s) | Not stated |
| Resolution | 0.01 m/s, 1° (Option 4 SDI-12) / 0.1° (Options 1-3 ASCII) | 0.01 m/s, 0.1° (Options 1-3) / 1° (Option 5) | 0.01 m/s, 1° | Not stated |
| Construction | Luran S KR 2861/1C ASA/PC polycarbonate | Luran S KR 2861/1C ASA/PC polycarbonate | Thermoplastic and marine-grade stainless steel | Not stated |
| Weight | 0.5 kg | 0.5 kg | 260-270 g (with pole mount) | 0.5 kg |
| IP rating | IP66 | IP66 | IP69k, IP68, IP66 (EN 60529:1992) | IP66 |
| Operating temperature | -35°C to +70°C | -35°C to +70°C | -40°C to +70°C | Not stated |
| Output rate | 0.25, 0.5, 1, 2 or 4 Hz | Not stated | Not stated | Not stated |
| Output options | RS232, RS422, RS485, SDI-12, Modbus RTU 2-wire RS-485, analogue 0-5 V, 0-20 mA or 4-20 mA | RS232, RS422, RS485 (Options 1-3), Modbus RTU (Option 5), analogue 0-5V or 4-20mA | RS-485 (ASCII, Modbus RTU), RS-422 (NMEA 0183), SDI-12 | Not stated |
| Protocols | ASCII, NMEA 0183, SDI-12 v1.3, Modbus RTU | ASCII, NMEA 0183, Modbus RTU | Not stated | Not stated |
| Power | 5-30 VDC or 9-30 VDC depending on output option; <2 mA @ 12V (SDI-12) to 44 mA @ 12V (4-20 mA) | 12-30 VDC (Options 1-3); 9-30 VDC (Option 5) | 5-30 VDC; under 100 mW to 800 mW unheated; under 7.6 W heated | Not stated |
| Warranty | 24 months | 24 months | Not stated | Not stated |
| WMO compliance | Not stated | WMO-compliant gust calculated from rolling average | Not stated | Not stated |
| Response time | Not stated | Not stated | 0.125 seconds | Not stated |
| Size | Not stated | Not stated | 84 mm diameter; 107-189 mm height (depending on mount) | Not stated |
| Heating | Not stated | Not stated | Configurable low-power, under 7.6 W heated | Not stated |
| Connector | Not stated | Not stated | M12 8-way | Not stated |
| Configuration port | Not stated | Not stated | USB 2.0 Micro B | Not stated |
| Standards | Not stated | Not stated | CE, UKCA, FCC Part 15, BS EN 61326:2013, BS EN 60945:2002, RoHS | Not stated |
| Measured parameters | Not stated | Not stated | Not stated | Wind speed and direction |
| Wind range | Not stated | Not stated | Not stated | 0 to 60 m/s |
| Wind accuracy | Not stated | Not stated | Not stated | ±0.3 m/s (0 to 10 m/s); ±3% (10-40); ±5% (40-60) |
| Compass | Not stated | Not stated | Not stated | 2-axis (integrated) |
| GPS | Not stated | Not stated | Not stated | Optional |
| Operating temp | Not stated | Not stated | Not stated | -35°C to +70°C |
| Outputs | Not stated | Not stated | Not stated | RS232, RS422, RS485, SDI-12, NMEA, MODBUS |
| Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
WIND
Wind at sea, on vessels and offshore
Salt, spray and motion. These are the options built to survive it, from a compact sensor for small craft to stainless steel for ships and platforms.
| Best for | Coastal sites and smaller vesselsWindSonic M | Small craft and uncrewed vesselsWindUltra | Ships and platformsWindObserver 65 | Ships with analogue systemsWindObserver II | Wind on a vesselGMX260 |
|---|---|---|---|---|---|
| Choose it when | A plastic body would not stand up to salt and spray, and winds stay within 60 m/s. | Space and weight are tight, or the sensor needs IP68 and IP69K protection. | You need stainless steel and optional de-icing for commercial marine use, with Lloyd's Register type approval. | The vessel's system takes 4-20 mA or voltage, and you need Lloyd's Register type approval. | You need wind on a moving platform, with a 6-axis compass and protection against submersion. |
| Wind speed range | 0 to 60 m/s (116 knots) | 0 to 75 m/s (168 mph, 270 km/h) | 0 to 65 m/s (145 mph) | 0 to 65 m/s (145 mph) | Not stated |
| Wind speed accuracy | ±2% RMSE @ 12 m/s | <2% RMSE or 0.1 m/s (0 to 20 m/s); <3% RMSE (>20 m/s) | <2% RMSE @ 12 m/s | <2% RMSE @ 12 m/s | Not stated |
| Wind direction range | 0-360° (no dead band) | 0-360° | 0-360° (no dead band) | 0-360° | Not stated |
| Wind direction accuracy | ±2° RMSE @ 12 m/s | <1° RMSE (0 to 20 m/s); <2° RMSE (>20 m/s) | <2° RMSE @ 12 m/s | <2° RMSE @ 12 m/s | Not stated |
| Resolution | 0.01 m/s, 0.1° | 0.01 m/s, 1° | 0.01 m/s, 1° | 0.01 m/s, 1° | Not stated |
| Construction | Al Alloy 6061 T6, hard anodised | Thermoplastic and marine-grade stainless steel | 316 stainless steel | 316 stainless steel | Not stated |
| Weight | 0.9 kg | 260-270 g (with pole mount) | 1.4 kg | Being confirmed | 0.5 kg |
| IP rating | IP66 (BS EN 60529:1992) | IP69k, IP68, IP66 (EN 60529:1992) | IP66 (NEMA4X) | IP66 (NEMA4X) | IP66 and IP68 |
| Operating temperature | -40°C to +70°C (with heating); -35°C to +70°C (without) | -40°C to +70°C | -55°C to +70°C (with heating) | -55°C to +70°C (with heating) | Not stated |
| Output options | RS232, RS422, RS485, analogue 0-5V or 0-20mA or 4-20mA | RS-485 (ASCII, Modbus RTU), RS-422 (NMEA 0183), SDI-12 | Not stated | Not stated | Not stated |
| Protocols | ASCII, NMEA 0183 | Not stated | Modbus RTU | Not stated | Not stated |
| Heating | Optional, 24V AC/DC, 4.2 A @ 24V | Configurable low-power, under 7.6 W heated | Optional 3A @ 24 VAC/DC | Optional 3A @ 24 VAC/DC | Not stated |
| Standards | BS EN 60945:2002 vibration and compass safe distance, UL2218 Class 1 impact | CE, UKCA, FCC Part 15, BS EN 61326:2013, BS EN 60945:2002, RoHS | Not stated | Not stated | Not stated |
| WMO compliance | WMO-compliant gust calculated from rolling average | Not stated | Rolling average and 3-second gust to WMO No. 8 | Not stated | Not stated |
| Warranty | 24 months | Not stated | Not stated | Not stated | Not stated |
| Response time | Not stated | 0.125 seconds | Not stated | Not stated | Not stated |
| Size | Not stated | 84 mm diameter; 107-189 mm height (depending on mount) | Not stated | Not stated | Not stated |
| Power | Not stated | 5-30 VDC; under 100 mW to 800 mW unheated; under 7.6 W heated | Not stated | Not stated | Not stated |
| Connector | Not stated | M12 8-way | Not stated | Not stated | M12 8-way (corrosion-resistant) |
| Configuration port | Not stated | USB 2.0 Micro B | Not stated | Not stated | Not stated |
| Power (anemometer only) | Not stated | Not stated | 9-30 VDC, 30 mA @ 12 VDC | 9-30 VDC, 40 mA @ 12 VDC | Not stated |
| Outputs | Not stated | Not stated | RS422 / RS485 full or half duplex | RS422 / RS485 full or half duplex | RS232, RS422, RS485, SDI-12, NMEA, MODBUS |
| Output rate | Not stated | Not stated | 1, 2, 4, 5, 8 or 10 Hz | 1, 2, 4, 5, 8 or 10 Hz | Not stated |
| Parameters | Not stated | Not stated | UV, Polar, NMEA, Tunnel | Not stated | Not stated |
| Analogue outputs | Not stated | Not stated | Not stated | 3 channels (speed, direction, status or sonic temperature); ±2.5 V, 0-5 V or 4-20 mA; scales in multiples of ±10 m/s up to ±70 | Not stated |
| Certifications | Not stated | Not stated | Not stated | Lloyd's Register type approval; ABS Product Design Assessed | Not stated |
| Measured parameters | Not stated | Not stated | Not stated | Not stated | Wind speed and direction |
| Wind range | Not stated | Not stated | Not stated | Not stated | 0 to 60 m/s |
| Compass | Not stated | Not stated | Not stated | Not stated | 6-axis (with tilt, pitch, roll) |
| GPS | Not stated | Not stated | Not stated | Not stated | Optional |
| Operating temp | Not stated | Not stated | Not stated | Not stated | -35°C to +70°C |
| Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
WIND
Wind in ice, storms and extreme conditions
When the sensor has to keep working through icing or survive storm-force wind. The choice is how cold, how windy, and how much power you have for heating.
| Best for | Cold, moderate windWindSonic M | Cold, compact and low powerWindUltra | Icing, up to 65 m/sWindObserver 65 | Icing, high wind, turbine controlWindObserver 75 | The most extreme windsWindObserver 90 |
|---|---|---|---|---|---|
| Choose it when | Icing down to -40°C is the issue, but winds stay within 60 m/s. | You need heating down to -40°C and winds up to 75 m/s, with little space or power available. | You need stainless steel and optional 3 A de-icing. | Winds reach 75 m/s in cold climates, or the reading drives turbine yaw and pitch. | Survival in storms up to 90 m/s matters most: high-altitude turbines, polar sites, offshore platforms. |
| Wind speed range | 0 to 60 m/s (116 knots) | 0 to 75 m/s (168 mph, 270 km/h) | 0 to 65 m/s (145 mph) | 0 to 75 m/s (168 mph) | 0 to 90 m/s (201 mph) |
| Wind speed accuracy | ±2% RMSE @ 12 m/s | <2% RMSE or 0.1 m/s (0 to 20 m/s); <3% RMSE (>20 m/s) | <2% RMSE @ 12 m/s | <2% RMSE @ 12 m/s; ±1% within ±25° of datum for turbine control | ±2% @ 12 m/s; ±4% @ 90 m/s |
| Wind direction range | 0-360° (no dead band) | 0-360° | 0-360° (no dead band) | 0-360° (no dead band) | 0-360° (no dead band) |
| Wind direction accuracy | ±2° RMSE @ 12 m/s | <1° RMSE (0 to 20 m/s); <2° RMSE (>20 m/s) | <2° RMSE @ 12 m/s | <2° RMSE @ 12 m/s; ±1° for turbine control | ±2° @ 12 m/s |
| Resolution | 0.01 m/s, 0.1° | 0.01 m/s, 1° | 0.01 m/s, 1° | 0.01 m/s, 1° | 0.01 m/s, 1° |
| Construction | Al Alloy 6061 T6, hard anodised | Thermoplastic and marine-grade stainless steel | 316 stainless steel | 316 stainless steel | 316 stainless steel |
| Weight | 0.9 kg | 260-270 g (with pole mount) | 1.4 kg | 1.7 kg (with 2m cable); 1.3 kg (with connector) | 1.7 kg (with 2m cable); 1.3 kg (with connector) |
| IP rating | IP66 (BS EN 60529:1992) | IP69k, IP68, IP66 (EN 60529:1992) | IP66 (NEMA4X) | IP66 (NEMA4X) | IP66 (NEMA4X) |
| Operating temperature | -40°C to +70°C (with heating); -35°C to +70°C (without) | -40°C to +70°C | -55°C to +70°C (with heating) | -55°C to +70°C (with heating) | -55°C to +70°C (with heating) |
| Output options | RS232, RS422, RS485, analogue 0-5V or 0-20mA or 4-20mA | RS-485 (ASCII, Modbus RTU), RS-422 (NMEA 0183), SDI-12 | Not stated | Not stated | Not stated |
| Protocols | ASCII, NMEA 0183 | Not stated | Modbus RTU | Not stated | Not stated |
| Heating | Optional, 24V AC/DC, 4.2 A @ 24V | Configurable low-power, under 7.6 W heated | Optional 3A @ 24 VAC/DC | 7 A @ 24 VAC/DC (1 W/cm², approx 150 W) | 7 A @ 24 VAC/DC (1 W/cm², approx 150 W) |
| Standards | BS EN 60945:2002 vibration and compass safe distance, UL2218 Class 1 impact | CE, UKCA, FCC Part 15, BS EN 61326:2013, BS EN 60945:2002, RoHS | Not stated | Not stated | Not stated |
| WMO compliance | WMO-compliant gust calculated from rolling average | Not stated | Rolling average and 3-second gust to WMO No. 8 | Rolling average and 3-second gust to WMO No. 8 | Not stated |
| Warranty | 24 months | Not stated | Not stated | Not stated | Not stated |
| Response time | Not stated | 0.125 seconds | Not stated | Not stated | Not stated |
| Size | Not stated | 84 mm diameter; 107-189 mm height (depending on mount) | Not stated | Not stated | Not stated |
| Power | Not stated | 5-30 VDC; under 100 mW to 800 mW unheated; under 7.6 W heated | Not stated | Not stated | Not stated |
| Connector | Not stated | M12 8-way | Not stated | Not stated | Not stated |
| Configuration port | Not stated | USB 2.0 Micro B | Not stated | Not stated | Not stated |
| Power (anemometer only) | Not stated | Not stated | 9-30 VDC, 30 mA @ 12 VDC | Not stated | Not stated |
| Outputs | Not stated | Not stated | RS422 / RS485 full or half duplex | RS422 / RS485 full or half duplex | RS422 / RS485 full or half duplex |
| Output rate | Not stated | Not stated | 1, 2, 4, 5, 8 or 10 Hz | 1 to 4 Hz | 1 to 4 Hz |
| Parameters | Not stated | Not stated | UV, Polar, NMEA, Tunnel | Not stated | Not stated |
| Icing standard | Not stated | Not stated | Not stated | MIL-STD-810F Method 521.2 Procedure I | MIL-STD-810F Method 521.2 Procedure I |
| Calibration | Not stated | Not stated | Not stated | Not stated | Calibrated in Merlin Wind Tunnel, traceable to national standards |
| Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
WIND
Wind at airports and helipads
Start with one question: is the reading used for official wind reporting? If it is, it has to be FAA and CAA accepted.
| Best for | Official wind reportingWindObserver 70 | Aviation supportWindObserver 65 | Exposed, extreme airfieldsWindObserver 90 |
|---|---|---|---|
| Choose it when | The reading is used for AWOS surface wind reporting and must be FAA and CAA accepted. This is the only option that is. | You need rugged, de-iced wind data around the airfield, but not for official FAA or CAA reporting. | The site sees storm winds up to 90 m/s and the sensor has to survive them. |
| Wind speed range | 0 to 70 m/s (156 mph) | 0 to 65 m/s (145 mph) | 0 to 90 m/s (201 mph) |
| Wind speed accuracy | <2% RMSE @ 12 m/s | <2% RMSE @ 12 m/s | ±2% @ 12 m/s; ±4% @ 90 m/s |
| Wind direction range | 0-360° (no dead band) | 0-360° (no dead band) | 0-360° (no dead band) |
| Wind direction accuracy | <2° RMSE @ 12 m/s | <2° RMSE @ 12 m/s | ±2° @ 12 m/s |
| Resolution | 0.01 m/s, 1° | 0.01 m/s, 1° | 0.01 m/s, 1° |
| Construction | 316 stainless steel | 316 stainless steel | 316 stainless steel |
| Weight | 1.7 kg (with 2m cable); 1.3 kg (with connector) | 1.4 kg | 1.7 kg (with 2m cable); 1.3 kg (with connector) |
| IP rating | IP66 (NEMA4X) | IP66 (NEMA4X) | IP66 (NEMA4X) |
| Operating temperature | -55°C to +70°C (with heating) | -55°C to +70°C (with heating) | -55°C to +70°C (with heating) |
| Heating | 7 A @ 24 VAC/DC (1 W/cm², approx 150 W) | Optional 3A @ 24 VAC/DC | 7 A @ 24 VAC/DC (1 W/cm², approx 150 W) |
| Icing standard | MIL-STD-810F Method 521.2 Procedure I | Not stated | MIL-STD-810F Method 521.2 Procedure I |
| Aviation acceptance | FAA and CAA accepted as part of suitable AWOS; meets ICAO Annex 3 | Not stated | Not stated |
| Output rate | 1 to 4 Hz | 1, 2, 4, 5, 8 or 10 Hz | 1 to 4 Hz |
| Outputs | RS422 / RS485 full or half duplex | RS422 / RS485 full or half duplex | RS422 / RS485 full or half duplex |
| WMO compliance | Rolling average and 3-second gust to WMO No. 8 | Rolling average and 3-second gust to WMO No. 8 | Not stated |
| Power (anemometer only) | Not stated | 9-30 VDC, 30 mA @ 12 VDC | Not stated |
| Protocols | Not stated | Modbus RTU | Not stated |
| Parameters | Not stated | UV, Polar, NMEA, Tunnel | Not stated |
| Calibration | Not stated | Not stated | Calibrated in Merlin Wind Tunnel, traceable to national standards |
| Datasheet | Datasheet | Datasheet | Datasheet |
3D AIRFLOW
Turbulence, structural loading and ventilation
When the up-and-down movement of air matters as well as speed and direction. The choice is wind speed, construction and how the head has to sit.
| Best for | 3D airflow, general useWindMaster | 3D airflow in high windsWindMaster Pro | Awkward mounting positionsWindMaster RA |
|---|---|---|---|
| Choose it when | You need the vertical component as well as the horizontal, for meteorology, structures, wind energy or ventilation. | Wind speeds reach 65 m/s or the site is marine, and you want sharper vertical resolution. | The installation is restricted or the head has to sit at a non-standard angle. |
| Wind speed range | 0 to 50 m/s | 0 to 65 m/s | 0 to 50 m/s |
| Wind speed accuracy | Under 1.5% RMS at 12 m/s | Under 1.5% RMS at 12 m/s | Under 1.5% RMS at 12 m/s |
| Direction accuracy | 2° at 12 m/s | 2° at 12 m/s | 2° at 12 m/s |
| Output rate | 20 Hz standard (32 Hz option) | 32 Hz standard | 20 Hz standard (32 Hz option) |
| Outputs | U, V, W, SoS, sonic temperature | U, V, W, SoS, sonic temperature | Not stated |
| Construction | Aluminium and carbon fibre | Stainless steel | Aluminium and carbon fibre |
| IP rating | IP65 | IP65 | IP65 |
| Operating temp | -40°C to +70°C | -40°C to +70°C | -40°C to +70°C |
| Weight | 1.0 kg | 1.7 kg | 1.0 kg |
| Digital output | RS232, RS422, RS485 | RS232, RS422, RS485 | RS232, RS422, RS485 |
| Analogue outputs | Optional (12 or 14 bit, 4 channels) | Optional (14 bit, 4 channels; includes PRT input) | Optional (12 or 14 bit, 4 channels) |
| Power | 9-30 VDC, 55 mA at 12 VDC | 9-30 VDC, 55 mA at 12 VDC | 9-30 VDC, 55 mA at 12 VDC |
| Custom calibration | Optional (wind tunnel test) | Optional (wind tunnel test) | Optional (wind tunnel test) |
| W resolution | Not stated | Improved vs standard WindMaster | Not stated |
| Head design | Not stated | Not stated | Right-angle |
| Datasheet | Datasheet | Datasheet | Datasheet |
3D AIRFLOW
Flux and eddy covariance research
Very fast readings from a sensor that disturbs the air as little as possible. Two questions decide it: how many readings a second, and which direction of flow matters most.
| Best for | Flux work, minimal disturbanceWindMaster HS | Research flux at 50 HzR3-50 | Research turbulence at 100 HzR3-100 | Horizontal flow at 100 HzR3A-100 | Vertical flow at 50 HzHS-50 | Vertical flow at 100 HzHS-100 |
|---|---|---|---|---|---|---|
| Choose it when | Eddy covariance or offshore work where the sensor itself must disturb the airflow as little as possible. | Eddy covariance and turbulence research where 50 readings a second is enough. | High-frequency turbulence analysis where 50 Hz is not enough. | Horizontal airflow matters most and the sensor should interrupt it as little as possible. | Vertical flow matters most, with a stainless body and a built-in inclinometer. | As above, but at the highest output rate in the family. |
| Wind speed range | 0 to 45 m/s | 0 to 45 m/s | 0 to 45 m/s | 0 to 45 m/s | 0 to 45 m/s | 0 to 45 m/s |
| Wind speed accuracy | Under 1.5% RMS at 12 m/s | Under 1% RMS | Under 1% RMS | Under 1% RMS | Under 1% RMS | Under 1% RMS |
| Direction accuracy | 2° at 12 m/s | Under ±1° RMS | Under ±1° RMS | Under ±1° RMS | Under ±1° RMS | Under ±1° RMS |
| Output rate | 32 Hz (internal: 20 or 32 Hz) | 50 Hz (selectable 0.4 to 50 Hz) | 100 Hz (selectable 0.4 to 100 Hz) | 100 Hz (selectable 0.4 to 100 Hz) | 50 Hz (selectable 0.4 to 50 Hz) | 100 Hz (selectable 0.4 to 100 Hz) |
| Head design | Horizontal (minimal flow disturbance) | Not stated | Not stated | Asymmetric (horizontal flow accuracy) | Horizontal (vertical flow accuracy) | Horizontal (vertical flow accuracy) |
| Construction | Stainless steel | Aluminium and carbon fibre | Aluminium and carbon fibre | Aluminium and carbon fibre | Stainless steel | Stainless steel |
| IP rating | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 |
| Operating temp | -40°C to +70°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C | -40°C to +60°C |
| Weight | 2.96 kg | 1.0 kg | Not stated | 1.2 kg | Not stated | Not stated |
| Digital output | RS232, RS422, RS485 | RS422 full duplex only | RS422 full duplex only | RS422 full duplex only | RS422 full duplex only | RS422 full duplex only |
| Analogue outputs | Optional (14 bit, 4 channels) | Supplied PCIA unit (7 channels, 14 bit) | Supplied PCIA unit (7 channels, 14 bit) | Supplied PCIA unit (7 channels, 14 bit) | Supplied PCIA unit (7 channels, 14 bit) | Supplied PCIA unit (7 channels, 14 bit) |
| Power | 9-30 VDC, 55 mA at 12 VDC | 9-30 VDC (under 150 mA at 24 VDC) | 9-30 VDC (under 150 mA at 24 VDC) | 9-30 VDC (under 150 mA at 24 VDC) | 9-30 VDC (under 150 mA at 24 VDC) | 9-30 VDC (under 150 mA at 24 VDC) |
| Custom calibration | Optional (wind tunnel test) | Provided as standard | Provided as standard | Provided as standard | Provided as standard | Provided as standard |
| Analogue inputs | Not stated | Optional SIU (6 differential, 14 bit) | Optional SIU (6 differential, 14 bit) | Optional SIU (6 differential, 14 bit) | 6 differential inputs (separate electronic unit) | 6 differential inputs (separate electronic unit) |
| Inclinometer | Not stated | Not stated | Not stated | Optional | Built-in (range ±20°, accuracy ±0.3°) | Built-in (range ±20°, accuracy ±0.3°) |
| Accuracy note | Not stated | Not stated | Not stated | Applies for incidence up to ±50° from horizontal | Not stated | Not stated |
| Datasheet | Datasheet | Datasheet | Datasheet | Not stated | Datasheet | Datasheet |
WEATHER
Full weather monitoring
Wind, temperature, humidity and pressure as a starting point. The choice is what you add: rainfall, rainfall accuracy, sunlight, or sensors mounted apart.
| Best for | Core weather, no rainGMX500 | Adds rainfallGMX600 | Adds the most accurate rainfallGMX603 | Adds rainfall and sunlightGMX551 | Sensors mounted apartMetConnect One |
|---|---|---|---|---|---|
| Choose it when | Wind, temperature, humidity and pressure are enough. | You need rainfall as well as core weather. | Rainfall accuracy matters, so you want the higher-accuracy optical rain sensor. | You want wind, weather, rainfall and solar radiation from one instrument. | Sensors need to sit at different heights, or you want to add your own. |
| Measured parameters | Wind speed and direction, temperature, humidity, pressure | Wind, temperature, humidity, pressure, precipitation | Wind, temperature, humidity, pressure, precipitation | Wind, temperature, humidity, pressure, solar, precipitation | Wind, temperature, humidity, pressure (integrated) |
| Wind range | 0 to 60 m/s | 0 to 60 m/s | 0 to 60 m/s | 0 to 60 m/s | Not stated |
| Temperature range | -35°C to +70°C (-40°C with transducer heating) | -35°C to +70°C (-40°C with transducer heating) | -35°C to +70°C (-40°C with transducer heating) | -35°C to +70°C (-40°C with transducer heating) | -35°C to +70°C |
| Compass | 2-axis | 2-axis | 2-axis | 2-axis | Not stated |
| GPS | Optional | Optional | Optional | Optional | Not stated |
| Heating | Optional transducer heating (low power) | Optional transducer heating (low power) | Optional transducer heating (low power) | Optional transducer heating (low power) | Not stated |
| IP rating | IP66 | IP66 | IP66 | IP66 | Hub box IP66 and IP67, sensors IP66 |
| Weight | 0.7 kg | 0.8 kg | 1.1 kg | 0.8 kg | Not stated |
| Outputs | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS |
| Precipitation | Not stated | Optical, 0-300 mm/hr | High-accuracy optical, 0-200 mm/hr, ≤5% accuracy | Optical or tipping bucket option | Not stated |
| Tip size | Not stated | Not stated | 0.1 mm | Not stated | Not stated |
| Solar radiation | Not stated | Not stated | Not stated | 0-1600 W/m² (ISO 9060 Class C) | Not stated |
| Wind | Not stated | Not stated | Not stated | Not stated | Integrated WindSonic (0 to 60 m/s) |
| Extra inputs | Not stated | Not stated | Not stated | Not stated | 2 analogue (0-5V or 4-20mA), 1 PRT (Pt100), 1 rain gauge |
| Configuration | Not stated | Not stated | Not stated | Not stated | Sensors can be placed at different heights |
| Standards | Not stated | Not stated | Not stated | Not stated | WMO-aligned |
| Construction | Not stated | Not stated | Not stated | Not stated | 316 stainless steel hub box and bracket, UV-stabilised polycarbonate sensor housings |
| Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
WEATHER
Measuring rainfall
The choice is what else you need to measure alongside rainfall, and how accurate the rainfall reading has to be.
| Best for | Rain and wind onlyGMX240 | Rain without windGMX400 | Rain with full weatherGMX600 | The most accurate rainfallGMX603 | Rain, sunlight and full weatherGMX551 |
|---|---|---|---|---|---|
| Choose it when | Temperature and pressure are already measured separately. | You need rainfall with temperature, humidity and pressure, and no wind. | You need rainfall alongside wind and core weather. | Rainfall accuracy matters more than anything else. | You want everything from a single instrument. |
| Measured parameters | Wind speed and direction, precipitation | Temperature, humidity, pressure, precipitation | Wind, temperature, humidity, pressure, precipitation | Wind, temperature, humidity, pressure, precipitation | Wind, temperature, humidity, pressure, solar, precipitation |
| Wind range | 0 to 60 m/s | Not stated | 0 to 60 m/s | 0 to 60 m/s | 0 to 60 m/s |
| Wind accuracy | ±0.3 m/s (0 to 10 m/s); ±3% (10-40); ±5% (40-60) | Not stated | Not stated | Not stated | Not stated |
| Precipitation | Optical, 0-300 mm/hr | Optical, 0-300 mm/hr | Optical, 0-300 mm/hr | High-accuracy optical, 0-200 mm/hr, ≤5% accuracy | Optical or tipping bucket option |
| Compass | 2-axis | Not stated | 2-axis | 2-axis | 2-axis |
| GPS | Optional | Not stated | Optional | Optional | Optional |
| Heating | Not stated | Not stated | Optional transducer heating (low power) | Optional transducer heating (low power) | Optional transducer heating (low power) |
| IP rating | IP66 | IP66 | IP66 | IP66 | IP66 |
| Operating temp | -35°C to +70°C | Not stated | Not stated | Not stated | Not stated |
| Weight | 0.5 kg | 0.5 kg | 0.8 kg | 1.1 kg | 0.8 kg |
| Outputs | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS |
| Temperature range | Not stated | -35°C to +70°C | -35°C to +70°C (-40°C with transducer heating) | -35°C to +70°C (-40°C with transducer heating) | -35°C to +70°C (-40°C with transducer heating) |
| Tip size | Not stated | Not stated | Not stated | 0.1 mm | Not stated |
| Solar radiation | Not stated | Not stated | Not stated | Not stated | 0-1600 W/m² (ISO 9060 Class C) |
| Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
WEATHER
Measuring sunlight on solar sites
Irradiance on its own, or with the weather that affects panel output.
| Best for | Sunlight onlyGMX301 | Sunlight and core weatherGMX501 | Sunlight, rain and full weatherGMX551 |
|---|---|---|---|
| Choose it when | You only need irradiance, for solar monitoring or research. | You need irradiance with wind, temperature, humidity and pressure. | You also need rainfall. |
| Measured parameters | Solar radiation only | Wind, temperature, humidity, pressure, solar radiation | Wind, temperature, humidity, pressure, solar, precipitation |
| Solar radiation | 0-1600 W/m² (ISO 9060 Class C) | 0-1600 W/m² (ISO 9060 Class C) | 0-1600 W/m² (ISO 9060 Class C) |
| GPS | Not stated | Optional | Optional |
| Heating | Not stated | Optional transducer heating (low power) | Optional transducer heating (low power) |
| IP rating | IP66 | IP66 | IP66 |
| Operating temp | -35°C to +70°C | Not stated | Not stated |
| Weight | 0.6 kg | 0.8 kg | 0.8 kg |
| Outputs | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS |
| Wind range | Not stated | 0 to 60 m/s | 0 to 60 m/s |
| Temperature range | Not stated | -35°C to +70°C (-40°C with transducer heating) | -35°C to +70°C (-40°C with transducer heating) |
| Compass | Not stated | 2-axis | 2-axis |
| Precipitation | Not stated | Not stated | Optical or tipping bucket option |
| Datasheet | Datasheet | Datasheet | Datasheet |
WEATHER
Weather on vessels and platforms
Both options have a 6-axis compass and protection against submersion. The choice is wind only, or full weather with true wind calculated on board.
| Best for | Wind on a vesselGMX260 | Full weather on a vesselGMX560 |
|---|---|---|
| Choose it when | You need wind on a moving platform, with a 6-axis compass and protection against submersion. | You need wind and weather at sea, with true wind calculated on board. |
| Measured parameters | Wind speed and direction | Wind, temperature, humidity, pressure |
| Wind range | 0 to 60 m/s | 0 to 60 m/s |
| Compass | 6-axis (with tilt, pitch, roll) | 6-axis (with tilt, pitch, roll) |
| GPS | Optional | Optional |
| Heating | Not stated | Optional transducer heating (low power) |
| IP rating | IP66 and IP68 | IP66 and IP68 |
| Operating temp | -35°C to +70°C | Not stated |
| Connector | M12 8-way (corrosion-resistant) | M12 8-way (corrosion-resistant) |
| Weight | 0.5 kg | 0.7 kg |
| Outputs | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS |
| Temperature range | Not stated | -35°C to +70°C (-40°C with transducer heating) |
| True wind | Not stated | Calculated on-board |
| Datasheet | Datasheet | Datasheet |
WEATHER
Weather when you do not need wind
For sites that already measure wind, or do not need it.
| Best for | Air conditions onlyGMX300 | Air conditions and rainfallGMX400 | Room for a wind sensor laterMetConnect THP |
|---|---|---|---|
| Choose it when | You need temperature, humidity and pressure and do not need wind. | You need temperature, humidity, pressure and rainfall, without wind. | You want temperature, humidity and pressure now, with inputs for a separate wind sensor or other sensors. |
| Measured parameters | Temperature, humidity, pressure | Temperature, humidity, pressure, precipitation | Temperature, humidity, pressure (integrated) |
| Temperature range | -35°C to +70°C | -35°C to +70°C | -35°C to +70°C |
| Humidity range | 0-100% RH | Not stated | Not stated |
| Pressure range | 300 to 1250 hPa | Not stated | Not stated |
| IP rating | IP66 | IP66 | Hub box IP66 and IP67, sensors IP66 |
| Weight | 0.5 kg | 0.5 kg | Not stated |
| Outputs | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS | RS232, RS422, RS485, SDI-12, NMEA, MODBUS |
| Precipitation | Not stated | Optical, 0-300 mm/hr | Not stated |
| Wind input | Not stated | Not stated | Single M12 connector for remote Gill anemometer |
| Cold climate option | Not stated | Not stated | Pair with heated WindObserver (full-unit heating) or WindSonic M (100W full-sensor heating) |
| Extra inputs | Not stated | Not stated | 2 analogue (0-5V or 4-20mA), 1 PRT (Pt100), 1 rain gauge |
| Configuration | Not stated | Not stated | Sensors can be placed at different heights |
| Standards | Not stated | Not stated | WMO-aligned |
| Construction | Not stated | Not stated | 316 stainless steel hub box and bracket, UV-stabilised polycarbonate sensor housings |
| Datasheet | Datasheet | Datasheet | Datasheet |
INSIDE THE MACHINE
Knowing how much liquid is in the tank
Fuel, oil, water or coolant, with no moving parts. The choice depends on the liquid and the platform the tank sits in.
| Best for | Weight-critical tanksLevelLite | Industrial tanksLevelPro | Difficult liquidsLevelSlick | Military platformsLevelDefend |
|---|---|---|---|---|
| Choose it when | Every gram counts: motorsport and other weight-critical platforms. | Process control, transport, power generation, marine or off-highway machines. | The liquid is difficult to measure and electrically conductive. | The platform is a defence vehicle or military marine craft. |
| Measurement type | Capacitive, continuous | Capacitive, continuous | Conductive, continuous | Capacitive, continuous |
| Accuracy | ±1% at 50% FSD, 20°C | ±2% FSD at 20°C | Not stated | ±2% FSD at 20°C |
| Probe length | 100 to 750 mm in 1 mm steps | 100 to 2000 mm in standard increments | 250, 350, 450, 600, 800, 1000, 1500 or 2000 mm | Built to order |
| Operating temperature | -40°C to +125°C (see derating graph) | -40°C to +125°C (see derating graph) | -40°C to +85°C (without cable) | -40°C to +125°C |
| Ingress protection | IP68 | Not stated | IP66 / IP68 / IP69K to EN60529 | IP67 |
| Pressure | 10 bar absolute and differential | 10 bar differential and absolute | 10 bar differential, 5 bar absolute | To customer requirement |
| Supply voltage | 5 to 32 V DC | 5 to 32 V DC (voltage), 9 to 32 V DC (current) | +6 to +32 V DC | 18 to 32 V DC |
| Supply current | <20 mA | Not stated | 15 to 40 mA depending on type | Not stated |
| Primary output | 0.25 to 4.75 V standard, 0.25 to 10 V maximum | 0.25 to 4.75 V factory set, 0.25 to 10 V maximum, or 4 to 20 mA | 0.25 to 4.75 V DC, 4 to 20 mA, or resistive | 4 to 20 mA (3 wire plus V, signal and ground) |
| Secondary output | Switched (open collector 50 V / 1 A) or temperature | Selectable high/low alarm | Open collector 50 V / 0.5 A max switch to ground | Not stated |
| Resolution | 10 bit | 10 bit | 12 bit (4096 points over measurement range) | 10 bit |
| Sample rate | 100 Hz | Not stated | Not stated | Not stated |
| Data interface | RS232, configuration only | RS232, configuration only (adaptor required) | Micro USB, sensor mounted | RS232 |
| Construction | 6082 grade aluminium, sealed electronics | Stainless steel 316, FEP, PEI | Stainless steel 316, FEP, EDPM | Anodised aluminium 6082 T6, FEP, M3 earth stud |
| Mounting | 1, 2, 3, 5 hole and M22 x 1.5 threaded | SAE 5-bolt, 1.125in UNF, 1.25in BSP threaded, 2in NPT | 1.25in BSP thread | SAE 5-bolt |
| Weight | 48 g at 100 mm probe, plus 0.256 g/mm | Not stated | Not stated | From 300 g depending on length |
| ATEX | Not designed or certified for ATEX | Not stated | Not stated | Not designed or certified for ATEX |
| Linearity | Not stated | ±2% FSD at 20°C | Not stated | ±2% FSD at 20°C |
| Report rate | Not stated | 100 Hz | Not stated | 80 Hz |
| Humidity | Not stated | 93% RH at 40°C | Not stated | Not stated |
| Seals | Not stated | Fluorosilicone O-rings or Klingersil gasket (excluding NPT) | Not stated | Axial 3 mm Viton O-rings |
| Output update rate | Not stated | Not stated | 10 Hz (0 to 10 V), 100 Hz (resistive) | Not stated |
| Corrosion resistance | Not stated | Not stated | Marine grade stainless steel 316 | Not stated |
| Venting | Not stated | Not stated | Vented tanks only | Not stated |
| EMC | Not stated | Not stated | EN60945 marine, EN61000-6-2/6-3, EN61326-2-1 | Not stated |
| Standards | Not stated | Not stated | Not stated | Not stated |
| Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
INSIDE THE MACHINE
Knowing exactly where a moving part is
Non-contact sensing, so nothing wears out. The choice depends on how far the part moves and whether it slides or rotates.
| Best for | Short travel, up to 25 mmBlade25 | Long travel, up to 60 mmBlade60 | Full rotationBlade360 | Two independent outputsBlade Dual Output |
|---|---|---|---|---|
| Choose it when | The part moves up to 25 mm in a line, or up to 90° around a point. | The part moves up to 60 mm in a line, or up to 90° around a point. | The part rotates, through up to a full 360°. | You need one or two output channels from a single sensor. |
| Measurement | Linear ±12.5 mm configurable, angular ±45° configurable | Linear ±30 mm configurable, angular ±45° configurable | 0 to 360° configurable | Rotary ±45°, linear range governed by activator shape |
| Range accuracy | ±0.1 mm or equivalent | ±0.1 mm or equivalent | ±0.5% FS over temperature range | ±3% over full temperature range |
| Output | Analogue 0 to 5.6 V, PWM 250 Hz or 1 kHz, RS232 / RS485 optional, switch | Analogue 0 to 4.2 V, PWM 250 Hz or 1 kHz, RS232 19.2K 8N, switch | Analogue 0 to 5.5 V, PWM 1 kHz, RS485 19.2K 8N, switch | Single analogue, single 5 V ratiometric, or dual analogue |
| Supply voltage | 4.8 to 32 V DC | 4.8 to 30 V DC | 4.8 to 32 V DC | 6 to 30 V DC |
| Supply current | <10 mA with comms | <10 mA with comms | <25 mA without comms | <10 mA |
| Over voltage protection | >33 V DC | >31 V DC | >33 V DC | >31 V DC |
| Reverse polarity protection | Up to -32 V DC | Up to -30 V DC | Up to -32 V DC | To -30 V DC |
| Resolution | 10 bit over configured range | 10 bit over configured range | 10 bit over configured range | 10 bit |
| Sample rate | 1 kHz | 1 kHz | 1 kHz | 1 kHz |
| Rise time | 2 ms | 2 ms | 2 ms | Not stated |
| Ingress protection | IP67 | IP67 | IP67 | IP67 |
| Operating temperature | -40°C to +85°C at 32 V DC max, -40°C to +125°C optional at 14 V DC max | -40°C to +85°C standard, -40°C to +125°C optional | -40°C to +85°C at 32 V DC max, -40°C to +125°C at 14 V DC max | -40°C to +85°C standard (see FLAGS) |
| Size | 6 x 40 × 50 mm (D x W x L) | 6 x 77 × 32.5 mm (D x W x L) | 16 mm x Ø38 mm | 19 x 25.5 × 64 mm (D x W x L) |
| Sensor to activator clearance | 0.5 to 2 mm | 0.5 to 2 mm | 0.5 to 2 mm, concentricity <0.5 mm | Not stated |
| Mounting | 2 x Ø4 mm holes on a 30 mm pitch | 2 x Ø4 mm holes on a 65.5 mm pitch | 3 x M3 screws, 0.25 Nm maximum torque | 2 x Ø4 mm holes on a 30 mm pitch |
| Weight | 21.0 g excluding cable | 25.6 g excluding cable | 22.8 g excluding cable | 34 g |
| Dither life | Non-contact, no deterioration through use | Not stated | Not stated | Non-contact, no deterioration through use |
| Switch output | Not stated | Switch to ground, 30 V DC max, 8 mA | Not stated | Not stated |
| Error level | Not stated | Not stated | 0.3 V default, configurable | Not stated |
| Output range | Not stated | Not stated | Not stated | Single channel 0 to 4.3 V at 5 V supply, 0 to 4.5 V at 6 V |
| Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
INSIDE THE MACHINE
Spotting wear before it becomes a failure
Metal debris in lubricating oil is the early warning. The main difference between the two is where you read the result.
| Best for | Wear read by the systemWearDetect | Wear read at the machineWearDetect with display |
|---|---|---|
| Choose it when | You want wear debris reported continuously to the control system. | You also need to read the result at the equipment itself. |
| Measures | Fine debris, coarse debris, oil status, oil probe temperature | Fine debris, coarse debris, water or temperature channel |
| Over voltage protection | >32 V DC | >32 V DC |
| Reverse polarity protection | To -32 V DC | To -32 V DC |
| Analogue output | 0.25 to 10 V DC or 4 to 20 mA, configurable | Three channels, 0.25 to 10 V DC or 4 to 20 mA, configurable |
| Digital output | CAN J1939 (PGN 130816) or Modbus RTU RS-485 half duplex | CAN J1939 (PGN 130816), 8 byte data length |
| Analogue resolution | 10 bit | 10 bit |
| Report rate | 10 Hz analogue, 1 Hz digital | 10 Hz analogue, 1 Hz digital |
| Sensor configuration | USB | USB, Gill software |
| Sensor size | 57 x Ø24.5 mm | 57 x Ø24.5 mm |
| Sensor protection | IP66 / IP68 | IP66 / IP68 |
| Enclosure protection | IP65 | IP65 |
| Differential pressure | 10 bar | 10 bar |
| Operating temperature | -26°C to +150°C sensor, +85°C enclosure | -26°C to +150°C sensor, +85°C enclosure |
| Humidity | 95% RH at +55°C | 95% RH at +55°C |
| Materials | Stainless steel, FEP, PEI (sensor); aluminium alloy, stainless steel, polyester (enclosure) | Not stated |
| Mounting threads | M22 x 1.5, M24 x 2.0, 3/4in x 16 UNF | M20 x 1.5 and others, contact Gill |
| ATEX | Not designed or certified for ATEX | Not designed or certified for ATEX |
| Datasheet | Datasheet | Datasheet |
INSIDE THE MACHINE
Ignition for gas engines
Chosen by cylinder count and engine size.
| Best for | Ignition, up to 12 cylindersGS12 | Ignition, up to 6 cylindersGT6 |
|---|---|---|
| Choose it when | You need ignition for a gas engine with up to 12 cylinders and per-cylinder timing. | You need compact ignition for a gas engine with up to 6 cylinders, up to 13 litres. |
| Number of cylinders | 1 to 12 | 1 to 6 |
| Power | 12 / 24 V DC, 5 A | 12 / 24 V DC, 5 A |
| Spark duration | 500 to 3000 µs continuous | 500 to 1500 µs continuous |
| Maximum RPM | 4000 | 4000 |
| Timing | Global, individual cylinder, dual fuel | Global, dual fuel |
| Timing maps | 2D speed and timing, or 3D speed, timing and load, 5 maps | Not stated |
| Trigger methods | Single pickup, OEM disc and pickup, A3 or A5 conversion kit, GM distributor timing kit, drilled flywheel pattern | Gill timing disc and standard pickup, OEM cam disc, A5 conversion kit, drilled flywheel pattern for wasted spark |
| Communications | RS232, DB9 female | RS232, DB9 female |
| Software | Windows based, multi-level security versions | Windows based GillFire, multi-level security versions |
| Features | Tach output signal, shutdown ground, fuel valve sequencing | Tach output signal |
| Visual features | 3 integrated LED status indicators | Integrated LED lights |
| Application | All horsepower and engine sizes, up to 2 coils per cylinder | Engines up to 13 L (800 in³) |
| Environmental | -40°C to +90°C, sealed to IP67 | -40°C to +90°C, sealed to IP67 |
| Fuels | Not stated | Natural gas, propane, LPG, landfill, digester and other biogas |
| Datasheet | Datasheet | Datasheet |
ONE ANSWER
Problems with a single answer
Nothing to compare here: for these jobs Gill makes one product, so it is the answer.
Hazardous areas
Offshore oil and gas platforms, petrochemical plants and other explosive atmospheres need an intrinsically safe, ATEX, IECEx and UKEX certified sensor.
The answer: WindObserver IS
Worker heat stress
Assessing heat stress for people working outdoors, with WBGT and Thermal Work Limit calculated in the sensor.
The answer: GMX552
Air/fuel mixture on a gas engine
Holding lambda to a set point on a static gas engine, stoichiometric with a three way catalyst or lean burn.
The answer: AF120
Catch tank oil in endurance racing
Oil level in the catch tank, currently specific to the ACO ELMS race series.
The answer: Catch tank sensor
Showing the tank level
A 29 LED display for a Gill level sensor, with tank profiling for irregular shapes and a low level warning.
The answer: DD1615 display
Have an application to discuss?
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