Gas Monitoring

Available for rental and hire, our extensive range of Gas Monitoring Equipment includes units for monitoring and analysing Benzene, Methane, Hydrogen Sulphide, Carbon Monoxide, Oxygen, Emissions, Landfill, Mercury Vapour, Hydrocarbons,  PIDs and VOCs.

With instruments available from leading manufacturers RAE Systems, Thermo Scientific, Crowcon and Geotech, the broad rental fleet covers a range of applications including confined space monitoring, spot checking and continuous monitoring. 


Monitoring Benzene levels is essential in applications such as tank entry pre-screening during refinery and plant maintenance, hazardous material response and refinery downstream monitoring. Ashtead Technology provides the latest Benzene monitoring instrumentation, such as the Ultra RAE Benzene monitor, the TGM 7200, a quick, spot-check monitor used to provide highly specific measurements of Benzene.

Confined Space Monitors

Ashtead Technology carries a variety of small, lightweight multi-gas monitors and PIDs to protect workers from hazardous gases in a variety of confined space situations. Our instruments, from manufacturers such as RAE Systems and Crowcon, measure volatile organic compounds (VOCs) in low parts per million.

Emissions Monitoring

Ashtead Technology offers a variety of instruments for continuous emission monitoring applications, from leading manufacturers such as Horiba, Testo, Crowcon and SICK. These include combustion analysers, flame ionisation detectors (FIDs), hydrocarbon and multi-parameter analysers.

Hydrogen Sulphide (H2S) Analysers

Ashtead Technology provides the Jerome J605 H2S Analyser, providing real-time analysis for Hydrogen Sulphide. The J605 has an accuracy of ±1 ppb at the calibration of 5ppb - fulfilling the needs of the tightest of EPA requirements for hydrogen sulphide testing.

Landfill Gas Meters

Ashtead Technology’s landfill gas monitors, manufactured by Geotech, are designed to monitor landfill gas extraction systems, flares and migration control systems by sampling and analysing the methane, carbon dioxide and oxygen content of landfill gas. These instruments measure gas flow rate, BTU content, relative and atmospheric pressures, CH4 and LEL.

Mercury Vapour Analysers

Ashtead Technology supplies mercury vapour analysers for rental from Jerome. These are ideal for use in a wide variety of applications including mercury surveys and spill response, industrial hygiene, landfill monitoring, indoor/outdoor air quality testing, mercury exclusion tests and exhaust duct monitoring.

Methane Gas Detectors

Ashtead Technology provides hydrocarbon analysers capable of methane/non-methane organics determination.

Multi Gas Detectors

Ashtead Technology’s multi-gas monitors, manufactured by leading suppliers such as Crowcon and RAE Systems, are the ideal solution to provide protection for personnel in tight, confined spaces. Multi-gas monitors with PIDs are also available.

Perimeter Monitoring

Ashtead Technology has detectors with powerful reporting features to generate real-time data that is accurate, achievable and retrievable to help make quick, informed decisions whilst limiting future liability.

PIDs and FIDs

Ashtead Technology’s portable PIDs and FIDs, supplied by leading manufacturers such as RAE Systems, are the perfect solution for VOC monitoring in various applications including hazardous material response, confined space entry and personnel or workplace monitoring.

VOC Detection

Ashtead Technology’s VOC monitors are ideal for applications in hazardous material response, confined space entry and personnel or workplace monitoring.