What gas are you looking to detect or monitor?


Our VOC instruments and sensors incorporate leading photoionization detection (PID) technology for the fast, accurate detection of volatile organic compounds in the harshest of environments.


Our range of handheld, personal and fixed benzene detectors provide fast, accurate detection to the hazards of benzene whilst providing optimal resistance to humidity and contamination.


Our handheld GasCheck G and GasCheck Tesla leak detectors provide fast, effective detection of gas leaks and give stable, reliable readings to almost any gas or gas mixture.


MVI provides portable mercury vapour detection that accurately detects mercury in just three seconds! MVI does not saturate or need regenerating between readings, providing efficiency, time, and cost savings.


Designed for the location, leak testing and measurement of SF6 leaks in high voltage electrical switchgear, choose from our range of handheld, transportable and fixed SF6 leak detectors.


Hydrosteel is available as a portable of fixed instrument for non-intrusive corrosion monitoring and effective measurement of hydrogen flux within petrochemical refining and gas production operations.

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Who are we?

We are the largest manufacturer of photoionization detection (PID) sensors with our technology trusted by major gas detection manufacturers around the globe. As well as sensors, we manufacture a range of leading handheld, personal and fixed PID detection instruments for the fast, accurate detection of volatile organic compounds (VOCs). Additional to our PID range are our gas leak detectors, SF6 leak detectors, and portable mercury detectors.

Over 30 years industry experience

With over 30 years designing and developing sensors and instrumentation for the gas detection industry, we provide you with a vast array of knowledge and expertise.

Exceptional service & support

Renowned in the industry for our exceptional level of customer service and support, our friendly team are on hand to help you and guarantee a fast response to your inquiry.

Where to find us

Our USA office is based in Stafford, Texas. With our headquarters and manufacturing plant based in the UK, just outside of Cambridge, we have additional offices in Germany and Italy, along with a global network of Distributors.

About us

Visit our About Us pages and watch our video to find out more!

Ion Science’s Tiger has impressed me with it’s reliability in humid environments. It’s a nice sized instrument, easy to use and is an easy piece of equipment to calibrate. It is an extremely good product, and the correspondence between Ion Science and myself has been prompt and precise.

Jeremy Kinman, Hydrogeologist - Artbury Environmental Engineering

Cub is just the product we have been waiting for. It’s a low cost personal and reliable PID monitor which is just what we need to assess workers exposure out on the field to monitor occupational exposure in the chemical industry. The quality of the product is excellent, along with it’s simplicity, accuracy, stability, easy of use, and it’s extremely lightweight. We dealt with Ion Science’s Swiss distributor, Lauper Instruments, who were a pleasure to deal with. Brilliant customer care all round, we feel we can really rely on them.

Vincent Perret, CIH CEO - TOXpro SA

We recently purchased a GasCheck G directly from Ion Science. The overall service received from Ion Science has been excellent; we needed an instrument fast and they delivered. The GasCheck G is being used for helium leak detection, and with it’s ease of use and the construction of the instrument, it’s exactly what we needed to use on our site.

Derek Martin, Materials Manager - Stanre International Limited

Latest News

Effects of High Humidity on PIDs

| VOCs, Gas Detection, Cub personal VOC detector, Cub TAC benzene & total aromatic compound detector, Site investigation, PID Sensor | No Comments
Humidity is a natural phenomenon and is an amount of water vapor present in the atmosphere or in a gas.  Water vapor is the gaseous state of water and is…

How Can PID Instruments Assist First Responders in a HAZMAT Emergency Incident?

| VOCs, Gas Detection, Air Quality Monitoring, Site investigation, PID Sensor | No Comments
The almost instantaneous response of a PID instrument ensures that if conditions change with regard to disbursement of toxic gas or vapor, the perimeter can be adjusted accordingly. The versatile…
Continuous VOC Monitoring with the Falco - ION Science

Continuous VOC Monitoring with the Falco

| Falco fixed VOC detector | No Comments
Gas detection systems play a vital role in protecting working personnel in harsh environments, such as chemical plants, laboratory settings, industrial paint applications and wastewater facilities. Because volatile organic compounds…