From the bridge deck to the tunnel bore.
Measurement the network runs on.

Gill provides sensing and measurement technologies for bridges, cranes, highways, railways, tunnels and associated infrastructure. Applications include wind and weather monitoring, precipitation measurement, position sensing, liquid level measurement and equipment condition monitoring.

The appropriate sensor depends on the installation, wind-speed range, environmental conditions, mounting position and system requirements. Gill WindObserver and WindSonic provide ultrasonic wind measurement across different infrastructure applications.

Selected Gill wind sensors are available with heating and have been tested for operation in icing conditions. The appropriate configuration depends on the environmental conditions and application.

Road weather monitoring can include wind speed and direction, temperature, humidity, pressure and precipitation. The measurement configuration depends on the road environment and the decisions the data needs to support.

Non-contact position sensing removes mechanical contact between the sensing components. This can be useful for barriers, gates, expansion joints and other mechanisms that cycle repeatedly or operate in demanding environments.

Yes. Labcal provides UKAS-accredited calibration for Gill and non-Gill equipment across its accredited measurement parameters.

That is set by the structure owner, not by the instrument. Thresholds are usually tiered, with restrictions on high-sided vehicles and abnormal loads before a full closure, and they differ between structures.

With an ultrasonic anemometer mounted clear of the deck and the parapet, at a height and an exposure agreed with the structure owner, so the reading represents the wind acting on the structure rather than the eddy behind a barrier. Siting matters more than the sensor: a position in the lee of a truss will under-read the condition the threshold is written for.

The WindObserver 90 measures 0 to 90 m/s and suits the most exposed positions. The WindObserver 75 covers 0 to 75 m/s with an open head that holds accuracy as the flow angle increases. Where the dynamic response of the structure is the subject rather than the closure decision, the three-dimensional vector matters and the WindMaster Pro measures all three axes at up to 32 Hz.

Cups and vanes rely on bearings that wear, foul and freeze. When one seizes it reports calm, and a crane acting on that reading keeps lifting in wind that should have stopped it.

Ultrasonic measurement has no rotating element, so there is no seizure mode to produce a false calm.

The WindObserver range is heated, icing tested to MIL-STD-810F and operates from -55 to +70 degrees C with heating. The WindSonic M is heated aluminium operating to -40 degrees C.

Typically wind speed and direction, air temperature, humidity, pressure and precipitation, often with a road surface temperature probe on a separate input. The output feeds the roadside outstation that sets signs and limits.

No. Exposure changes with embankment, cutting, viaduct and terrain, which is why crosswind warning systems are sited at the specific locations that generate the risk.

Tipping buckets block with grit, leaf litter and ballast dust, 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.

With a position sensor that reports the actual mechanical position rather than the command. The Blade range is non-contact inductive, in linear and rotary formats, with a dual-output variant where redundancy is required.

Wind speed and direction at the portal and the pressure differential across it, because both change how the ventilation system behaves and how smoke would move in an incident.

With a level sensor in the chamber and, ideally, rainfall intensity nearby so the response can be related to the event. Capacitive sensors have no moving parts to foul with silt and debris.

A continuous, long-duration record, which usually means an instrument with nothing to wear and a protocol the acquisition system already accepts. Where dynamic response is the subject, the three-dimensional wind vector matters rather than horizontal speed alone.

Most take Modbus or a serial input. MetConnect outputs RS232, RS422, RS485, Modbus and SDI-12, with ASCII, Modbus RTU and ASCII, NMEA 0183 and SDI-12 v1.3 protocols. The WindObserver range outputs RS422 and RS485, with a Modbus RTU variant available on the 65 and 75.

Set by the asset owner and by what the measurement is used to justify. Where a reading supports a closure or a stopped lift, 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.

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.