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Cities and Buildings

You can design the building.
You can’t design the weather.

Ultrasonic wind and air-flow measurement, weather monitoring, level and position sensing and UKAS-accredited calibration for buildings, construction, district energy and the public realm.

1985
Building ultrasonic wind sensors in the UK
0
Moving parts to seize or replace
32 Hz
WindMaster Pro 3-axis output rate
150+
Countries where Gill operates

Buildings are designed against predictions. They operate in reality.

A building is consented against a wind microclimate study, a drainage strategy and an energy model. Each is a prediction made before anyone stands beneath the finished building, operates the plant or watches the drainage system handle a real storm.

Once the building exists, conditions become measurable. Wind changes around facades and at street level. Ventilation responds differently on different sides of a building. Rainfall tests drainage capacity. Plant operates through changing temperatures and loads. Construction sites create their own conditions at boundaries and around lifting operations.

The measurement has to work where those conditions actually occur, often in places that are difficult or expensive to revisit. It has to remain reliable, reach the system that needs the data and provide evidence when performance, safety or a planning condition is questioned.

The building is only one part of the measurement environment

Wind on the roof, facade and at street level. Temperature, humidity and pressure for ventilation and plant. Rainfall and level for drainage. Position on dampers, barriers and doors. Condition monitoring for machinery in the plant room.

The measurement points are spread across the building and the environment around it, from a parapet or crane jib to an attenuation tank below a car park. The application determines what the instrument has to survive, how often it can be accessed and how its data needs to be used.

Gill’s technologies span these requirements, from three-axis wind measurement for microclimate and ventilation through to weather, level, position and machinery condition sensing.

Wind where the environment changes

Street-level conditions can differ dramatically from those measured on a roof. Three-axis measurement captures the full wind vector where downdraught, acceleration, turbulence and pedestrian comfort matter.

WindMaster Pro: 3-axis measurement up to 32 Hz

Measurement for difficult-to-access positions

Rooftops, facades and construction equipment can leave little appetite for frequent access. Instrument construction, environmental protection and the absence of moving sensing components all become part of the specification.

WindObserver: 316 stainless steel, IP66, heated options

Beyond wind

The built environment depends on more than weather measurement. Rainfall, liquid level, position and machinery condition all contribute to how buildings, infrastructure and plant perform.

One sensing capability across multiple building systems

From sensor to building system

Measurement only becomes useful when the data reaches the system that needs it. Gill instruments provide industrial communication and analogue interfaces for BMS, SCADA and monitoring applications.

Modbus, RS485, serial, analogue and SDI-12

Independent verification

Building portfolios rarely contain instruments from one manufacturer. Labcal provides UKAS-accredited calibration for equipment from multiple manufacturers across six measurement parameters.

One traceable calibration service across a mixed instrument estate

Built environment sensing map

One building. Seventeen measurement points.

A building measures from the roof to the basement, and from the plant room to the pavement outside.

Wind above the parapet, at the facade and at the kerb. Conditions for ventilation and plant. Rainfall and level for drainage. Position on everything that moves. Measurement for the machinery that keeps the building operating.

Explore the measurement points across a typical built environment and see what is being measured, where the measurement happens and which sensing technology fits the application.

Get expert advice

Find your building application

Six built environment applications where measurement, integration and calibration meet the demands of the building and the street around it.

A city skyline of high rise towers seen across low rise housing
Microclimate

Pedestrian Wind Comfort

Test the study against the building

Wind microclimate studies are done in a tunnel or a model years before the building exists. Verifying them on site needs gust and turbulence measurement at the places people actually stand, not a mean wind speed from the roof.

Engineering: 3-axis turbulence measurement, compact street-level sensing, traceable calibration.

View Pedestrian Wind Comfort

Rooftop air handling and ventilation plant on a commercial building
Building services

Ventilation and Building Management

Control on the right side of the building

Natural and mixed-mode ventilation open and close on outside conditions. A single rooftop reading cannot tell a control system which facade is in the lee, which is how a good strategy produces bad comfort.

Engineering: 3-axis air-flow measurement, BMS integration, damper position feedback.

View Ventilation and BMS

A building maintenance unit and cradle rig on a high rooftop
Facade and access

Facade Access and Cradles

The limit belongs at the facade

Building maintenance units and cradles stop at a defined wind speed. The reading that stops them should come from the facade the crew is on, and the sensor there has to survive years without attention.

Engineering: Ultrasonic wind measurement, non-contact position feedback, UKAS-accredited calibration.

View Facade Access

Tower cranes over a high-rise construction site
Construction

Urban Construction Sites

Lifts, dust and the neighbours

A city site lifts over a public street, generates dust and noise at a boundary metres from a window, and answers complaints afterwards. Wind data at the jib and at the hoarding covers both.

Engineering: Ultrasonic wind measurement, boundary monitoring, analyser integration.

View Urban Construction Sites

An aerial view of a sustainable drainage attenuation basin
Water

Drainage, SUDS and Attenuation

Evidence, not assumption

Sustainable drainage is a planning condition before it is an engineering system. Demonstrating that an attenuation tank did what it was designed to do needs level and rainfall recorded through the storm, not modelled after it.

Engineering: Capacitive level sensing, optical precipitation, remote monitoring.

View Drainage and SUDS

An energy from waste and district heating plant with its flue stack
Energy

District Energy and Plant

Efficiency on the worst day

Heat networks and combined heat and power are sized against outside temperature and judged on annual efficiency. The plant that carries them fails in a basement, and the wear shows in the oil before it shows anywhere else.

Engineering: Gas engine controls, oil debris monitoring, environmental measurement.

View District Energy and Plant

Technical
insight

Why street-level wind is a 3-axis problem and roof-level wind is not

A rooftop anemometer answers a simple question: what is the wind doing above the building. Two axes are usually enough, and a heated WindObserver will keep answering it for years without attention.

Street level is a different problem. Downdraught off a facade, acceleration at a corner and vortices between towers all have a vertical and a turbulent component, and pedestrian comfort criteria are written around gusts rather than mean speeds. That needs the full three-dimensional vector, which is what the WindMaster Pro provides at up to 32 Hz across 0 to 65 m/s.

The same 3-axis measurement is what building and clean-room ventilation control uses, so the instrument that validates a microclimate study is often the one that ends up controlling the building.

That is the practical point. A pedestrian comfort study and a ventilation control loop are the same measurement asked at different moments, and specifying for one usually settles the other.

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Built environment technologies

Products and services engineered for buildings and the public realm, spanning wind and air-flow measurement, rooftop and boundary weather stations, level and position sensing and calibration across Gill.

Meteorological Technology

Gill WindMaster 3-axis ultrasonic anemometers
Microclimate and ventilation

WindMaster

3-axis ultrasonic anemometer

Measures the full three-dimensional wind vector, which is what pedestrian comfort, downdraught and ventilation control actually depend on.

Output rate : WindMaster Pro 32 Hz; WindMaster 20 Hz with a 32 Hz option
Range : WindMaster Pro 0 to 65 m/s, stainless steel head
Use : Building and clean-room ventilation control, microclimate survey

View WindMaster

Gill WindObserver ultrasonic anemometers
Roof and facade

WindObserver

Heated 316 stainless open-head 2-axis anemometer

For roof, facade and crane positions where a sensor has to work for years without being reached.

Range : WindObserver 90 measures 0 to 90 m/s; 75 measures 0 to 75 m/s
Build : 316 stainless steel, IP66, heated, icing tested to MIL-STD-810F
Direction : 0 to 360 degrees with no dead band

View WindObserver

Gill MaxiMet compact weather stations
Rooftop and boundary

MaxiMet

All-in-one weather station, no moving parts

One unit, one cable, one output string, which is what makes a rooftop or hoarding installation practical. The GMX552 adds WBGT heat stress.

Rooftop : GMX551 carries wind, T, H, P, solar and rainfall
Heat stress : GMX552 measures WBGT alongside wind, temperature, humidity and pressure
Solar : GMX301 measures solar radiation only, 0 to 1600 W per square metre

View MaxiMet

Gill MetConnect weather stations
BMS integration

MetConnect

Separable weather station with third-party inputs

The station for bringing existing building instruments into one record and getting the data into the BMS in a protocol it already speaks.

Inputs : Pt100 to IEC 60751, two analogue inputs, contact closure for rainfall
Outputs : RS232, RS422, RS485, Modbus and SDI-12; ASCII, NMEA 0183, SDI-12 v1.3
Accuracy : Temperature 0.2 degrees C, humidity 1.5 percent RH, pressure 0.5 hPa

View MetConnect

Industrial Sensors

Gill industrial sensors: capacitive level, non-contact position and oil condition monitoring
Drainage and plant

Level sensing

Capacitive liquid level sensors

Attenuation tanks, sumps and plant reservoirs, with no float to foul in silty or contaminated water.

LevelPro : Stainless steel, IP66 and IP68, 0-10 V or 4-20 mA, RS232 for configuration
LevelSlick : FEP coated for particulate, viscous and contaminated liquids
Display : DD1615 level display available

Explore level sensors

Gill Blade non-contact position sensors
Dampers and barriers

Blade position sensors

Non-contact inductive position sensing

Damper, barrier, gate and door position feedback with nothing in contact, on equipment that cycles all day.

Principle : Non-contact inductive, no wearing parts
Types : Linear and rotary, including dual output for redundancy
Range : Blade25, Blade60, Blade360 and Blade Dual Output

Explore position sensors

Gill TruMet PW100 optical rain gauge
Rainfall

TruMet PW100

Infrared optical rain gauge

A solid-state alternative to the tipping bucket, which on a roof or a green roof means nothing to block with leaf litter or substrate.

Range : 0 to 200 mm/hr, accuracy 5 percent, resolution 0.1 mm
Output : One pulse per 0.1 mm, replicating a tipping bucket
Limits : Liquid precipitation only, measurement range 0 to +70 degrees C

View TruMet PW100

Not sure which product fits?Tell us whether it is for a building, a rooftop or a city-wide network, what it has to survive and the system the data has to reach. Our team will narrow the range down with you.

Get expert advice

UKAS-accredited calibration for six measurement parameters

Labcal is an independent UKAS-accredited calibration laboratory, Lab 0625, operating to ISO/IEC 17025:2017. It provides calibration across gas and air flow, air velocity, liquid flow, pressure, temperature and humidity, all under one roof.

For built environment measurement that includes anemometers, Pitot tubes and thermal probes, alongside pressure gauges and transducers, thermometers, temperature and humidity probes and data loggers. Labcal supports equipment from Gill and other manufacturers, which matters across a portfolio where each building was fitted out by a different contractor.

01 · Gas and air flow

Gas meters · Mass flow controllers · Dispensing systems · Low-flow laboratory to higher-flow industrial

02 · Air velocity

Anemometers · Pitot tubes · Thermal probes

03 · Liquid flow

Flow meters and sensors · Process control equipment · Water used for the accredited capability

04 · Pressure

Gauges · Transducers · Manometers · Transmitters

05 · Temperature

Thermometers · Probes · Thermocouples · Data loggers

06 · Humidity

Hygrometers · Probes · Transmitters

One laboratory. Six UKAS-accredited parameters.Equipment from any manufacturer.
Explore Calibration Services

The measurement has to reach the system that runs the building

A building measurement is only useful once the building management system can act on it.

Gill supports environmental monitoring, industrial sensing, embedded electronics and systems integration to help developers, operators, consultants and controls contractors bring reliable measurement into BMS, SCADA and monitoring platforms.

The sensors output Modbus RTU, serial, analogue and SDI-12 rather than native BACnet, so where a BACnet estate is the target the data joins it through a gateway or the BMS controller already on site. Whether the requirement is Modbus into a BMS, an analogue loop into existing controls, SDI-12 across a monitoring network, or a bespoke embedded solution, Gill engineers can support integration from specification through commissioning.

Outputs and options

  • Modbus RTU & serial : Into a BMS directly, or into BACnet through a gateway
  • 4-20 mA & 0-10 V : Level and position into existing controls
  • SDI-12 & RS485 : Monitoring networks and outstations
  • Analogue & Pt100 : Third-party analysers and surface probes
Need siting advice, BMS protocol detail or a microclimate survey specification?Sensor siting, protocol documentation, mounting details and drawings. Direct from our engineering team.

Request information

Why building programmes specify Gill

01

The right measurement for street level

The WindMaster Pro measures all three axes at up to 32 Hz, which is what gust-based pedestrian comfort criteria and downdraught actually need.

02

Built for positions nobody revisits

No moving parts to seize, 316 stainless and IP66 on the WindObserver range, heating options and icing tested to MIL-STD-810F.

03

Engineering expertise

Gill pioneered ultrasonic wind measurement and has been building wind sensors in the UK since 1985, with the same principle now used across buildings, aviation, marine and research.

04

The whole building, not just the roof

Rainfall and level for drainage, position feedback for dampers and barriers, and oil debris monitoring for plant room machinery.

05

Designed to integrate

Modbus, SDI-12, RS485, 4-20 mA and 0-10 V, with analogue and Pt100 inputs where existing building instruments have to join the same station.

06

Evidence when a condition is tested

Independent UKAS-accredited calibration across six parameters, for equipment from any manufacturer, so a whole portfolio can sit with one laboratory.

Specifying for a building or city project?Talk through approvals, mounting, power and integration with our team before the specification is fixed.

Discuss your requirements

Built environment measurement questions, from siting to the BMS

Wind and microclimate

By measuring gusts and turbulence at the locations the study assessed, over a period long enough to capture representative conditions. Comfort criteria are written around gust speeds, so a mean wind speed does not answer the question.

The WindMaster Pro measures all three axes at up to 32 Hz across 0 to 65 m/s.

Gill engineering insightMeasure where people stand, not where mounting is convenient. The whole point of a downdraught problem is that it exists in one place and not two metres away.

No. A tower accelerates and deflects flow around and down its facades, which is why the microclimate study exists. Roof measurement is the reference; street level is the effect.

Because pedestrian comfort criteria are written around gusts rather than mean speeds, and the gust at street level has a vertical component. Downdraught off a facade, acceleration at a corner and vortices between towers are three-dimensional effects, and a 2-axis sensor cannot see the part of the flow that is arriving from above.

The WindMaster Pro measures the full three-dimensional vector at up to 32 Hz across 0 to 65 m/s, which is the rate the gust statistics behind Lawson or NEN 8100 style criteria need.

Gill engineering insightIf the study is going to be tested against a complaint, the record has to contain the quantity the criterion is written in. Measuring mean speed and arguing about gusts afterwards rarely ends well.

A compact 2-axis sensor mounted at the facade. The WindSonic 60 measures 0 to 60 m/s at 0.5 kg, which is straightforward to mount on a rail or parapet, and there is nothing in it to wear.

Clear of the parapet, plant and any adjacent taller structure, at a height where the flow is not still recovering from the roof edge. A station tucked behind a parapet reads the sheltered eddy rather than the wind.

Gill engineering insightThis is the single most common fault we see on buildings. The instrument is fine; the position makes it report a different building.
Building services and monitoring

Outside wind speed and direction, temperature, humidity and often pressure, ideally with enough resolution to know which facade is exposed. The WindMaster range is used for building and clean-room ventilation control.

Through the protocol the BMS already accepts. MetConnect outputs RS232, RS422, RS485, Modbus and SDI-12, with ASCII, Modbus RTU and ASCII, NMEA 0183 and SDI-12 v1.3 protocols. Level and position sensors also offer 4-20 mA and 0-10 V.

Because dust and noise complaints arrive with a time attached, and attributing them needs wind speed and direction recorded at the boundary. MetConnect takes two analogue inputs so the dust and noise monitors can feed the same record.

Non-contact inductive sensing. The Blade range covers linear and rotary formats with a dual output variant for redundancy, and has no wearing parts in the measurement.

Gill engineering insightOn life safety dampers the argument is not accuracy, it is that the feedback still works after ten years of no operation followed by one that matters.

Oil condition, fluid level and position feedback. WearDetect monitors lubricating oil for ferrous wear particles, which gives warning on chillers, pumps and generators before the noise or the failure does.

Yes. Alongside environmental measurement, the GS8, GS12 and GT6 ignition modules and the AF120 air and fuel ratio controller cover the gas engines in a CHP plant. All are IP67.

Drainage and environment

With a gauge on the site itself rather than a regional figure, because attenuation performance is judged against the rainfall the catchment actually received. Intensity matters as much as total depth: a design storm is defined by how fast the water arrived, not only how much.

An optical gauge such as the TruMet PW100 has no tipping mechanism to block with roof grit, moss or leaf debris, and it reports intensity continuously rather than in bucket increments. Pair it with capacitive level in the attenuation tank and the discharge record has both halves of the story.

Gill engineering insightThe evidence question is usually asked years later. A gauge that silently stopped tipping in year two produces a record that looks complete and is not.

By recording level in the tank alongside rainfall intensity through the event. Level with no moving parts is the practical choice, because a float in silty water is a maintenance visit waiting to happen.

Gill engineering insightLevelSlick is FEP coated specifically for contaminated and particulate liquids, which is what is actually in an urban attenuation tank.

Tipping buckets block with leaf litter, moss and green roof substrate, and under-read in light rain. The TruMet PW100 measures optically with no moving parts, 0 to 200 mm/hr at 5 percent accuracy and 0.1 mm resolution, and outputs a pulse per 0.1 mm so it replaces one directly.

As wet bulb globe temperature, which combines air temperature, humidity and radiant heat. On a street of hard surfaces the radiant component is what makes the difference. The MaxiMet GMX552 measures WBGT alongside wind, temperature, humidity and pressure.

Calibration and engineering

Set by the operator and by what the measurement is used to argue. Where a reading supports a planning condition, a comfort dispute or a performance guarantee, annual traceable calibration is common.

Labcal is UKAS-accredited to ISO/IEC 17025:2017 and calibrates air velocity, temperature, humidity, pressure, and gas and liquid flow.

Gill engineering insightAcross a portfolio this is where the independence matters. Each building was fitted out by a different contractor with different instruments, and one laboratory can take all of it.

Six: gas and air flow, air velocity, liquid flow, pressure, temperature and humidity. Labcal is an independent UKAS-accredited laboratory, Lab 0625, and calibrates equipment from any manufacturer, not only equipment supplied by Gill.

Yes. Alongside the standard ranges, Gill engineers develop embedded and integrated solutions where an off-the-shelf product does not fit the structure or the control architecture.

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