Flammable gas detector from Crowcon

Crowcon's IREX infrared (IR) flammable-gas detector is designed to replace pellistor (catalytic bead) type flammable-gas detectors, resulting in faster response times and reduced zero drift.

Capable of detecting methane, butane, propane and many other hydrocarbons, IREX is designed for the oil, gas and petrochemical industries.

Pellistor and some other IR-type gas detectors are fitted with sinters (flame arrestors) to achieve Exd flameproof certification.

Sinters slow down response time and can become blocked by contaminants.

An IREX detector results in a T90 response time of less than seven seconds.

Excellent zero stability is also achieved, with none of the drift issue associated with pellistors and cables.

IREX operates from the same control systems as pellistor-based detectors, which allows existing pellistor-based systems to be upgraded without any of the costs associated with installing a new control system.

IREX produces a mV Wheatstone bridge type signal (identical to a pellistor) and operates from as little as 2Vdc.

In addition, it is supplied with an M20 type fixing, allowing originally installed detector junction boxes and cables to be retained.

Zero and span adjustments (if required) are performed at the control panel, while gas response tests and calibration can be done remotely.

Test gas is applied via a tube to the standard weather cover.

IREX is designed to provide over 10 years operation with minimal costs during its lifetime.

Manufactured from 316 stainless steel, IREX has both ATEX and IECEx approval and is undergoing assessment for IEC61508 SIL 2 compliance.

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