Heimann Sensor is proud to present the new SMD type dual channel thermopile sensor designed for NDIR gas analysis. We are the market leader in thermopile arrays and sensors. With our patented thermopile technology, we produce very fast thermopiles and fully monolithic thermopile arrays with high signal and high specific detectivity.

Now, we are able to integrate two thermopile chips including integrated circuits for signal conditioning and temperature reference into a small 5x5mm² SMD ceramic package. Two optical filters, one for each channel, complete the dual channel SMD thermopile sensor.

For gas concentration measurements, one channel is typically equipped with a reference filter and the other channel with a gas specific filter. Heimann Sensor provides a large variety of filters for gases like CO2, CO, N2O, NO, HC and CH4. We are also able to provide custom filters for special applications on request.

The largest applicable thermopile chips have element sizes of 1.2 mm² each, which result in a high sensitivity of 44 V/W while the time constant is very low at 10 ms.

The dual channel SMD modules are available with built-in integrated circuits for analog or digital signal processing. The analog modules can be operated from 2.7 V up to 5.5 V, and provide a high operating temperature range from -20°C up to 120°C.

Important applications for NDIR gas detection include indoor and outdoor air quality monitoring, gas leak detection and industrial process control. In addition, there are medical applications such as monitoring the CO2 concentration in human breath (capnography) or monitoring and controlling N2O anesthetic gas concentration.

If you are interested in this product series, we can provide you with datasheets and samples to help you evaluate the desired application.