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[email protected]Catalytic (Pellistor) Gas Detectors: Working Principle: Catalytic gas detectors determine gas concentration through oxidization which results in heat, and this is sensed by a bridge circuit. It follows that catalytic gas detectors under-read in the low oxygen atmospheres which exist with gas …
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Get PriceDetection Range H 2 S: Gas Concentration Level 0-100 ppm range O 2 Depletion: Gas Concentration Level 0-25% by volume CO: Gas Concentration Level 0-1,000 ppm range Certifications/Approvals Intrinsically Safe, CSA Div 1 ANSI/ISA 92.00-2010 (R2015), ATEX/IECEx Zone 0
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Get PriceMay 03, 2004In all probability, your 3-wire gas detector is a catalytic type, which forms one half of a bridge (one leg being a pellistor and the other a resistor). Normally this would be connected to a module that has the other half of the bridge. Most Gas Detector manufacturers have a 4-20mA transmitter that can be used to interface to a PLC, for instance.
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