{"id":56560,"date":"2025-05-26T20:35:59","date_gmt":"2025-05-26T18:35:59","guid":{"rendered":"https:\/\/www.expo21xx.com\/news\/?p=56560"},"modified":"2025-05-26T20:36:02","modified_gmt":"2025-05-26T18:36:02","slug":"high-temperature-co2-detection-up-to-180-c-with-new-hermetic-sealingdedicated-reference-sensor","status":"publish","type":"post","link":"https:\/\/www.expo21xx.com\/news\/high-temperature-co2-detection-up-to-180-c-with-new-hermetic-sealingdedicated-reference-sensor\/","title":{"rendered":"High-Temperature CO2 Detection up to 180\u202f\u00b0C with New Hermetic Sealing,Dedicated Reference Sensor"},"content":{"rendered":"
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Photo by HEIMANN Sensor<\/figcaption><\/figure><\/div>\n\n\n

Introduction<\/h3>\n\n\n\n

Non-Dispersive Infrared (NDIR) spectroscopy is a well-established method for precise gas concentration measurement, especially for greenhouse gases such as CO2. This thermopile-based sensor system combines ruggedness, accuracy and adaptability for use in demanding environments. Designed to meet the toughest industrial conditions, it features high-temperature operation up to 180\u202f\u00b0C, hermetically sealed packaging for long-term durability, a separate, dedicated reference channel sensor and integrated temperature reference for thermal compensation.<\/p>\n\n\n\n

CO2 Detection with High Selectivity<\/h3>\n\n\n\n

This HTS-HT sensor is available in a configuration specifically tailored for carbon dioxide (CO2) detection, using a narrow-band IR filter centered around 4.26\u202f\u03bcm, the absorption peak of CO2. This ensures high selectivity and measurement sensitivity, even at low concentrations.<\/p>\n\n\n\n

Optional Dual-Sensor Design with Dedicated Reference Channel<\/h3>\n\n\n\n

This dual-channel system comprises two physically separate thermopile sensors: the active sensor
measures IR radiation after passing through a sample containing CO2 and the reference sensor serves
to track IR source stability and environmental influences.
By continuously comparing signals from both sensors, the system achieves drift-compensated, stable readings, even over long operating periods and in fluctuating environments.<\/p>\n\n\n\n

Integrated Temperature Reference<\/h3>\n\n\n\n

Each sensor includes a built-in temperature reference, allowing for thermal compensation of the
thermopile signal. This ensures that changes in ambient or device temperature do not affect the
accuracy of the gas concentration reading\u2014a critical feature in applications with wide or rapidly
changing thermal profiles.<\/p>\n\n\n\n

Durability for Harsh Conditions<\/h3>\n\n\n\n

Both active and reference sensors are designed to withstand operating temperatures up to 180\u202f\u00b0C,
humidity, dust, and chemical exposure, thanks to hermetically sealed housings. On top, they can
resist vibration and mechanical shock, typical in automotive and industrial installations.<\/p>\n\n\n\n

Applications<\/h3>\n\n\n\n

This dual-sensor system is ideal for emission monitoring in combustion engines or industrial
furnaces, exhaust gas analysis where direct sensor exposure to hot gases is required. Further
application fields include process control in harsh chemical environments with temperature and
humidity extremes as well as high-reliability safety applications, such as gas leak detection in
hazardous areas.<\/p>\n\n\n\n

Benefits at a Glance<\/h3>\n\n\n\n