Gas Sensing

Excelitas offers a number of thermopile detectors and pyrodetectors for gas sensing and monitoring.

These include thermopile detectors equipped with specialised bandpass filters for gas detection e.g. TPiD 1T 0515-Gx, where Gx is one of the Excelitas gas filters. The devices employ chips with large absorber size and have very high signal output for optical gas detection.

The PYSxxxx detector range has been designed for gas sensing applications. They are available with a range of narrow band pass filters for various gas types, in combination with a reference filter. Features include larger element sizes to offer more signal for non-focused optical systems, additional EMI protection and thermal compensation for compensation of thermal effects caused by temperature changes of the housing.

TPD 0223 / 0623

General-purpose miniature thermopile detectors in 4.7mm diameter TO46 type housing. Both feature a specially designed element configuration, each with a different size of absorbing area. The window is available as a standard infrared or as a narrowband pass filter for gas sensing applications. TPD 0223 provides the smallest absorbing area, the TPD 0623 is a larger design offering strong signals. Both types are equipped as standard with an internal thermistor as temperature reference for thermopile temperature compensation.

TPD 1T 0525 / 0625

These two thermopile detectors are specially designed for high signal output; they have a TO-5 housing with a square window. The window is available as a standard infrared or as a narrowband pass filter for gas sensing applications. Both types are equipped as standard with an internal thermistor as temperature reference for thermopile temperature compensation.

TPD 2T 0625

This specially designed detector offers dual channel performance in a TO-39 housing with 2 individual optical windows. Typically one window is fitted with a reference filter G20, while the other is fitted with a narrowband pass filter selected for a specific gas. The sensor is also equipped as standard with an internal thermistor as temperature reference for thermopile temperature compensation.