XGARD – Fixed detectors for flammable, toxic or oxygen gases


When lives and property are at risk and you need gas detection equipment that is totally reliable, you need Crowcon. For over 40 years Crowcon has been developing and manufacturing high quality products with a reputation for reliability and technical innovation.
The Xgard range of gas detectors has been specifically designed to meet your requirements. The dangers presented by toxic and and flammable gases as well as oxygen deficiency vary with each application.

Low cost of ownership

– Xgard detectors are designed to facilitate installation and maintenance to keep costs down.
– The three junction boxes on offer are all designed to simplify the replacement of sensors and sintered groups as much as possible. The sensors are inserted
simply to graft.

Wide range of sensors
Xgard offers an extremely wide range of sensors for all applications.
– Poison resistant pellistors for all flammable materials detection needs, including hydrocarbons, hydrogen, ammonia, kerosene, leaded petrol and halogen-containing vapors.
– Electrochemical sensors are used to detect a wide range of toxic gases and oxygen.
– Thermal conductivity sensors are available to monitor high concentrations of gas.
Flexible installation choices
– Xgard is designed to be mounted on the wall or on the ceiling, without the need for additional brackets.
– Xgard can make room for M20, ½ “NPT or ¾” NPT cable glands to adapt to any need on site.
– For hot environments (up to 1500C) models for high temperatures are available.
– Accessories are available for mounting on pipes and for sampling, as well as for remote gas emission for simple sensor control.

Robust and reliable
– Xgard is built using an assortment of three materials: glass-reinforced nylon, high-strength aluminum with a tough polyester coating, or 316 stainless steel for maximum corrosion resistance. All versions are designed to work in the most adverse conditions.
– Splash-proof spraying devices and weather-proof roofs are available for use in areas subject to frequent washing or for installations offshore.
– All models are SIL certified according to IEC 61508 (from SIL1 to SIL3)

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Product available - for orders before 12.00, shipping the same day.
(In case of payment by bank transfer, shipment will be made upon payment received).

Product temporarily out of stock - average delivery time: 10-20 days.

XGARD - Fixed detectors for flammable, toxic or oxygen gases - XG5-VQ21T XG5-VQ21TCode: 28687

Protection: IP65
Cable entries: 1/2 NPT
Sensor type: Catalytic sensor
Operating temperature: +10 to +55°C
Humidity: 0-90% RH
Operating voltage: 10-30 Vdc
Power requirements: 50mA @24V dc 1.2W
Electric output: 3-wire 4-20 mA 
Approvals: ATEX: II 2 GDExd IIC T6 Gb (Tamb -40 to +50°C) Exd IIC T4 Gb (Tamb -40 to +80°C) Ex tb IIIC T180°C Db