Servomex’s Thick Film Calorimetry technology provides a measurement for combustibles by combusting carbon monoxide and oxygen over a catalytic platinum surface to determine gas concentration. A four quadrant track features two quadrants coated in platinum, with a thin glaze applied to the whole disc.
A Wheatstone bridge circuit is created using the quadrants,and the disc is mounted in a measuring cell which is heated to 300°C. The gas sample is added and any carbon monoxide will combust on the catalyst, heating the respective quadrant, altering the current in the circuit. The output is directly proportional to the gas concentration, providing an accurate measurement.
Benefits include highly sensitive, accurate and stable measurements at low concentrations and with minimized drift, reducing ongoing maintenance needs.