Crowcon gas detectors calibration and repair Abu Dhabi
Principle of Operation
• The most common method for detecting flammable gases is based on catalytic combustion.
• The detector head consists of two elements: active (bead or pellistor) and reference (inactive or compensator).
• The active detector element is a platinum wire coil with a bead of refractory oxide coated with a precious metal catalyst.
• The reference element is identical but not coated with the metal catalyst to prevent gas oxidation.
• The detector elements are electrically matched to form a Wheatstone bridge, mounted behind a stainless steel sintered flame arrestor.
• Oxidation on the catalyst surface causes a rise in the active bead temperature and resistance, causing a change in the output signal.
• The inert reference element compensates for any changes in output signal due to ambient temperature and pressure variations.
• In DAS plants, hydrocarbon gas detectors are usually mounted at head height.
Crowcon Flammable gas detectors calibration and repair services in Abu Dhabi,Flammable gas detectors,GDS Corp, Draeger Polytron 8310 IR, MK8 Pellistor Gas Detector, Sensepoint XCD RFD, Smart Sensor, GTD-2000Ex IECEx, Flameproof Fixed Gas Detectors, Process Sensing Technologies, Gastron GTD-3000Ex, and Gastron Australia Pty Ltd. heating and process, and can be used in remote locations for safety. Infrared gas detectors, such as GTD-2000Ex IECEx, OLCT 100-XP-MS, and GD2G, are also available. GVDA, GD2G infrared gas detectors, and high-temperature gas detectors