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The benefits of continuous ground-gas monitoring have been given significant recognition within the contaminated land industry due to the publication of a technical bulletin compiled by CL:AIRE.

The paper, entitled ‘The utility of continuous monitoring in detection and prediction of “worst case” ground-gas concentration’ demonstrates how collecting continuous data can improve current site investigation methods.

It also reveals how more sophisticated methods, without the need for additional resource efforts, can be adopted and introduces analytical tools that allow for more appropriate risk assessment.

The Ion Science Gasclam is said to be the only ground-gas monitor on the market to continuously measure VOCs, CH4, CO2, O2, H2S, CO, atmospheric and borehole pressures, temperature and water level, which meets the requirements discussed within the CL:AIRE (Contaminated Land: Applications in Real Environments) research bulletin.

Topics of the CL:AIRE research bulletin include: ‘Detecting and predicting “worst-case” conditions’ and ‘Processes controlling gas production and migration’.

Ion Science manufactures and distributes a unique portfolio of technologically advanced gas detection equipment.


The range comprises of hand-held and fixed photoionisation detection (PID) instruments with a detection range of ppb to 10,000 ppm for volatile organic compounds (VOC’s) and other toxic gases. Also available are leak detectors for the detection of SF6 gas in high voltage switchgear and fixed or roaming corrosion monitors for the detection of hydrogen flux in steel pipes. Ion Science instruments are suitable for a wide range of industries and applications that include environmental, landfill, brownfield, petrochemical, first response, industrial safety and confined space entry.


Products are available through a global network of distributors. The company delivers a range of service options to customers designed to provide a full calibration, maintenance and repair service for all Ion Science instruments. Custom built facilities are located at Ion Science, or through a network of Authorised Service Centres around the globe.


Fully qualified engineers are on hand to provide customers with the best possible service and fast turnaround to minimise instrument downtime

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