Crowcon Detection Instruments Ltd

2 Blacklands Way
Abingdon Business Park
OX14 1DY
United Kingdom

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Fax: 01235 557718
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Since 1970, Crowcon Detection Instruments Ltd have been designing, developing and manufacturing a comprehensive range of fixed and portable gas detection devices. We have established a worldwide reputation for delivering products that you can rely upon to protect people and plant against gas hazards. We specialise in producing innovative, reliable and cost-effective flammable and toxic gas detection instruments.

Crowcon Instruments Ltd has been the market leader in its field for over 30 years, and during this time we have designed high-quality products for safety and environmental monitoring purposes. We are based in Oxfordshire, but have branches in Europe, South East Asia and North America which employ over 200 full time staff. Our products are sold all across the globe, serving many different industries. Our customers include oil, gas, petrochemical companies, sewage treatment companies, public utilities, fire brigades and construction companies. In fact, our products are used in any organisation where gas leakage poses a threat to the workplace.

If you would like to find out more about any of our goods and services, please do not hesitate to contact us, and we'll see if Crowcon can provide the right product for your application. Crowcon is part of the Halma Group which is recognised as one of the most successful engineering groups in the world.

Gas-T ec

This is a portable hydrocarbon gas detector for rapid gas surveying and leak localisation. The Gas-Tec is a state-of-the-art device which allows full data, event and GPS logging. This means the operator has the ability to store and send gas survey reports and highlight areas of significant leakage. The Gas-Tec detects gas in less than two seconds and has an easy-to-use functionality.

With seven language variants and enhanced electronic controls, this lightweight, robust and IP tested detector is perfect for a variety of applications. The Gas-Tec allows around 22 hours of use after a 2.5 hour battery charge. This model has been developed from the tried and tested Telegan Gas-Tec engine.

Tetra 3

The Tetra 3, the latest addition to the Tetra family, is an intrinsically safe personal Multigas monitor. This gas detector is extremely easy to use, thanks to its single button operation and small size and weight. Developed from the tried and tested Tetra products, the Tetra 3 has been designed for use in demanding industrial environments. It is water and dust resistant to IP67 and can even be submerged in water. Its compact and robust design also makes this device impact resistant.

The Tetra 3 can detect up to four gases and its lithium-ion battery offers over 16 hours operating time from a single charge. When the Tetra 3 detects gas, a rapid and effective warning is signalled with an extremely bright red and blue visual alarm and a vibrating alarm. 


These are detectors for flammable, toxic and oxygen gases. Our Xgard range comprises of a complete selection of fixed point gas detectors that meet the various requirements of gas detection regulations in industries across the globe.

Intrinsically Safe (IS) and Flameproof (Exd) options are available to suit a wide range of uses. The Xgard range offers a diverse range of sensors, including electrochemical sensors to detect toxic gases and oxygen, poison resistant pellistors to detect flammable gas, and thermal conductivity sensors to monitor concentrations of gases. 


The Gasmaster is a 1-4 Channel control system. Flexible and easy to use, this is the perfect solution for wherever you need a self-contained control panel that monitors fire or gas hazards. With outstanding performance and many unique features, the Gasmaster is an all-encompassing solution.

A large LCD screen offers simultaneous display of all channels, and an event log function allows alarms and faults to be checked. The Gasmaster control panel is operated with a full push-button keypad, meaning standard operation, calibration and test functions are simple and time-saving procedures. 


This compact and lightweight design is a full function personal single gas monitor that is robustly built for the most demanding of environments. With a single button operation and a large display screen which is easy to read, the Gasman makes gas monitoring effortless.

This device is available in several versions for monitoring flammable gas, oxygen and toxic gases. A 95dBA alarm and a bright flashing visual alarm provide a warning when gases are detected.

Confined Space Entry Monitor

Designed with confined space workers and fleet managers in mind, Gas-Pro offers detection of up to 5 gases in a compact, rugged solution capable of withstanding harsh environments and everyday use.

  • Easy to see top mount display
  • Internal pump (option)
  • Automatic fail safe flow plate recognition
  • Specific and unique Pre-Entry mode
  • +ve Safety TM (Positive Safety) tri-colour status indicator
  • Integral over moulded anti-shock case
  • Simple single button operation
  • Portable, wall and desk mount gas test solutions
  • Tailor +ve Safety TM to organisational requirements
  • Monitor 5 gases from many different options

Multipurpose; pumped and diffusion solutions offering multiple uses within one compact detector.

Infrared Hydrocarbon Gas Detector

Compact, low power and highly rugged infrared gas detector for monitoring potentially flammable concentrations of methane, butane, propane and many other hydrocarbon gases and vapours.

Display accessory available for direct connection to IRmax, or remote connection up to 30 metres from the detector. The IR Display shows gas and optical obscuration levels and enables non-intrusive calibration of the detector.

Leak Detector

The Spygas range combines sensitive high capacity sensors with an easy to use one-button operation. Designed to provide easy access for hard to reach areas whilst fitting into work clothes and tool pouches. The long life sensor provides lengthy and trouble free operation without the risk of poisoning, ensuring fast reliable readings.

  • Flammable, CO and Freon gas up to 10,000ppm
  • One touch button operation
  • Robust splash proof design
  • Tough plastic enclosure
  • Slim enough to fit into overalls and tool pouches
  • Easy to reach around pipework and other inaccessible areas
  • Both audible and LCD visual indicators
  • Crescendo alarm, rising with concentration levels
  • Geiger counter style click in normal operation
  • Battery level indicator
  • Automatic backlight
  • Powered by commonly available AA alkaline or rechargeable batteries (x2)



Registration Number: 00978878
VAT Number: n/a
Registered at Companies House:6 May, 1970 (54 years ago)
No of Employees: n/a
Annual Turnover: n/a
Parent Company: Halma plc
Company Type:
  • Manufacturer
  • Fabricator
  • Stockholder
  • Service Providers

Opening Times

Monday 09:00 AM - 05:30 PM
Tuesday 09:00 AM - 05:30 PM
Wednesday 09:00 AM - 05:30 PM
Thursday 09:00 AM - 05:30 PM
Friday 09:00 AM - 05:30 PM
Saturday Closed
Sunday Closed

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Additional Information

Brand & Trade Names

  • Crowcon
  • Telegan

Company Certifications

ISO 9000:2015 - Quality management systems – Fundamentals and vocabulary

Financial Information

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