Crowcon IREX Fixed Gas Detector

Overview

IR Technology versus Pellistor

Pellistors do not fail safe Sensors can be ‘poisoned’ and rendered insensitive to gas by silicones, lead, sulphurs and chlorinated compounds.
Pellistors are high maintenance Sensors must be regularly tested with gas to ensure they are stilloperational. Sensors typically last 3-5 years, after which they must beexchanged.
Pellistors must be operated behind a sinter (flame arrestor) Sinters may become blocked, thus preventing gas from reaching thesensor.
Pellistors may burn out If exposed to gas concentrations in excess of 110% LEL.
Pellistors need oxygen Their ability to detect gas reduces significantly in oxygen deficientatmospheres

Low power

  • IREX consumes less than 1W of power – ensures compatability with a wide range of control systems

Dependable

  • Independantly tested for reliability and performance in harsh offshore conditions by Micropack Engineering Ltd – demonstrates IREX will operate dependable in any application
  • 3rd party approval to the performance standard EN60079-29-1
  • Employs sophisticated systems and algorithms – ensures reliable operation at all times
  • T90 response time of less than 4 seconds – rapid indication of hydrocarbon gas hazards
  • Optical components are treated with a STAY-CLIR coating – prevents partial obscuration in condensing atmospheres

Easy to maintain

  • No adjustments are necessary at the detectors, zero and span adjustments (if required) are performed at the control panel only – saves significant time and cost
  • Test can be applied remotely via a tube to the standard weather cover
  • Sinter-free operation – unlike a pellistor sensor, there is no risk of a sinter becoming blocked
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