Approved Crowcon Gas Monitor Dealer

Survey Express Services are the UK’s leading Crowcon approved dealer and authorised service center.

All equipment within the Crowcon range is available through our 6 regional offices employing fully trained service technicians who are Crowcon trained and approved to undertake all servicing and repair tasks.

Survey Express Services have been dealers for over 20 years and during this time accumulated first-hand experience in Crowcon’s superb range of personnel gas monitors.

Like our customer’s, Survey Express Services appreciate Crowcon gas monitors for their reliability, low cost of ownership and functionality in arduous environments.

We operate a hire fleet containing hundreds of Crowcon units, all supported by our service team maintaining these instruments to optimal performance.

If you are looking for a standard confined space Crowcon gas monitor, we hold these in stock. However, if your requirements are for more exotic gases like PID/VOC, chlorine and ammonia gases, we hold a specialist fleet ready for hire.

Chlorine is often utilised within the water industry to remove contaminants, so requiring personnel gas monitors with 5 gas sensors which we provide.

If you have a requirement for gas monitors or need a professional service center to manage your fleet, please contact your nearest office

Check out our extensive range of personnel gas monitors or if you have a requirement for servicing, please contact our service center

GMI PS200 Series Gas Monitor

Survey Express Services are proud to introduce a new range of gas monitors from Scottish based manufacturer, Gas Measurement Instruments Ltd (GMI). This long established manufacturer of gas detection equipment, has launched its new Personal Surveyor (PS200 Series) product range.

The GMI PS200 Series is lightweight, robust and can detect oxygen, combustibles, hydrogen sulphide and/or carbon monoxide in a variety of confined space and industrial applications.

The large, easy to read display includes a built-in backlight that ensures easy viewing of gas concentration levels and other vital data. An extra loud alarm, flashing LED indicators and vibration alarm, alerts the user to hazardous conditions.

The multifunctional Auto Bump & Calibration Station provides simple but intelligent testing and calibration of the GMI PS200 Series portable gas detector. Easy to use, with a durable, user friendly design, this automated test station offers high performance from PC, stand-alone or ethernet options.

The Auto Bump & Calibration Station dramatically improves compliance record-keeping, efficiency and accuracy.


MED Approval
Gas Measurement Instruments has been awarded Marine Equipment Directive (MED) 'wheelmark' approval for its recently launched PS200 Series portable gas detector.

MED approval is a legal requirement for EU flagged vessels where O2 and/or flammable gas is potentially present. The PS200 Series is most commonly used on LNG and LPG carriers as well as cargo vessels and passenger ships.


Gas Measurement Instruments Ltd (GMI)
Founded in 1947, GMI is a world leader in the design and manufacture of high quality and innovative products, specifically designed for the oil and gas, chemical and shipping industries world-wide. GMI continues to invest heavily in research and development, a high percentage of which is spent on the development of state of the art instruments and new sensing technologies.


For more information on GMI's range, click here

Crowcon Tetra3 Extended

Gas detection specialist Crowcon has expanded the capabilities of its Crowcon Tetra:3 (T3) personal multi-gas detector with three more toxic gas sensors: ozone (03), sulphur dioxide (S02) and ammonia (NH3).

This complements the existing sensor range which includes flammable gases, oxygen (02), hydrogen sulphide (H2S), and carbon monoxide (CO).

The new sensors widen the applications for the Crowcon Tetra3 to include the chemical, pharmaceutical, food and beverage processing industries, as well as water and wastewater treatment facilities.

Featuring a top-mount display and the capacity to detect up to four gases at once, the Crowcon Tetra3 is designed for use in the most demanding industrial environments, including confined space work. It features intuitive, single button operation, essential for users with gloved hands.

Click for more information on the Crowcon Tetra3

Click for the complete range of Crowcon gas monitors

Crowcon Detection Instruments

When sourcing a gas monitor, the first thing a customer always encounters is the vast array of instruments and manufacturers. In recent years, the choice has increased with the development of smaller, lighter models featuring larger screens, simpler functions and a greater array of sensors.

Instrument features are not the only consideration that should be taken into account, reliability, cost of ownership and functionality in arduous environments should always be at the top of the list of considerations when choosing a safety related product.

A range of instruments that can meet these considerations and more, are from the UK based manufacturer, Crowcon.

Crowcon Detection Instruments are specialises in developing toxic gas detection equipment. With over 40 years experience, Crowcon has developed a range of gas detection instruments that are extremely reliable and provides a low cost of ownership. We know, their gas monitors have been operating within our hire fleet for over 15 years.

Under the guidance of their parent company, Halam PLC, Crowcon is able to call upon extensive resources for the development of market leading products. Based in Abingdon, Oxfordshire, the company has grown to encompass sales and support centres worldwide with major hubs in North America, Netherlands, Singapore, India and China. 60% of sales are now outside the United Kingdom.

Crowcon’s range is comprehensive from small single sensors to industrial fixed systems. Their pioneering attitude has enabled them to develop innovative products, like their area gas monitors, the Detective+ allowing a large site to be monitored. Or my favourite, the new Crowcon Gas-Pro which can monitor up to 5 separate gases.


So why are they dependable?
Crowcon design their instruments for functionality, reliability and robustness above all.

Major investments has been undertaken to ensure the design team understand customer requirements. Product managers play a lead role in instrument development. They investigate core markets, keeping in touch with customer and application requirements. This ensures that Crowcon instruments meet industrial demands and ensures their instruments run at optimum performance.

When developing the latest personnel gas detection instrument for confined space applications, the develop team underwent confined space courses to understand application demands. This essential training help guide the development of the new Crowcon Gas-Pro gas monitor.

Specification of sensors is no different. The latest range of sensors has been tested to ensure that they can perform in the field. Dual sourcing enables Crowcon to employ several sensors

Increased Warranty
Crowcon’s philosophy is to look to the future. Advances made in the improvement in reliability have allowed the company to offer extended warranty on many of their products. The extended 2 and 3 year warranty reduces cost of ownership further and increase the life expectancy of gas detection instruments.


Crowcon’s Range

Crowcon Eikon - Gas Detector
A simple single gas monitor with a two year operating life. This disposable instrument is designed for specific single gas monitoring. The Crowcon Eikon does not feature a screen to simply the operation of the instrument – Simple with no frills.

Crowcon Gasman - Gas monitor
The Crowcon Gasman is a single button, single sensor gas monitor with a very wide of sensors.

Crowcon Tetra3 - Gas monitor
A leading gas monitor utilised by many civil engineering and chemical processing companies due to its rugged design. The Crowcon Tetra3 features a top mounted display to improve the user ability in confined space applications. Features chlorine and ozone gas sensor options.

Crowcon Tetra - Gas monitor
The Crowcon Tetra is a dependable gas detection instrument featuring four separate sensor bays with an internal pump option.

Crowcon Gas-Pro - Gas monitor
The newest member of the Crowcon range. A completely new design for confined space applications. This instrument can be configured 5 gas sensors with a greater emphasis on reducing conflict in sensors in order to provide the most versatile gas monitor on the market.

Crowcon Triple Plus + gas monitor
The Crowcon Triple+ has been a long standing reliable gas detection instrument. The instrument design combines a rugged, reliability, ease of use design with a fully flexible range of sensor combinations for flammable gases, oxygen and toxic gases.

Crowcon Triple Plus + IR gas monitor
Triple Plus + IR is the latest version of the Triple Plus + utilising infrared sensing technology for detection and measurement of flammable hydrocarbons. IR sensors are suitable for both high gas concentrations and for use in inert (oxygen free) backgrounds. The unique design of the Crowcon IR sensor module used in Triple Plus + IR allows measurement of hydrocarbons at both %LEL and % volume ranges making this instrument ideal for tank and line purging applications.

Crowcon Detective – Area Gas Monitor
This unique gas detection instrument provides a dependable area gas monitoring. Link a number of units together and a large area can be covered under their umbrella, ideal for large engineering projects.

For more information on safety equipment

For a full range of gas monitors

1 Sensor Gas Monitor

2 Sensor Gas Monitor

3 Sensor Gas Monitor

4 Sensor Gas Monitor

5 Sensor Gas Monitor

BW Gas Alert Micro Clip XT Gas Monitor

The BW Gas Alert Micro Clip XT is a multi-gas monitor (H2S, CO, Oxygen and flammable), designed to enhance site safety and provide an easy to use multi-gas solution.

Its slim and compact design means that BW Gas Alert Micro Clip XT is as easy and comfortable to wear, as it is to use; the device features a slim and lightweight design that provides a non-intrusive monitoring solutions to workers in a wide range of applications.

BW Gas Alert Micro Clip XT also delivers excellent value for money and provides aspects like continuous LCD real-time gas concentrations, visual, audible and vibration alarms, force bump test / force calibration and auto Oxygen sensor calibration on start up.

BW Gas Alert Micro Clip XT is optimised to enhanced on-site safety through aspects like IntelliFlash™, which provides a visual indication of current operation to both the user and supervisor.

The device also features “force bump test” and “force calibration” functionality, helping to ensure that BW Gas Alert Micro Clip XT is always fully maintained and
ready to detect gas.

The GasAlertMicroClip XT is fully compatible with BW’s MicroDock II automatic test and calibration system.


For more information - BW Gas Alert Micro Clip XT

For more information - Range of Gas Monitors