Thermopile-based detectors integrate optical filters for CO2 sensors

Thermopile-based detectors with integrated optical filters for optical CO2 sensors have been added to Renesas Electronics’ medical and industrial portfolios.

There are four single- and dual-channel analogue detectors, all available in a TO-5-package. They are designed for use in a variety of industrial, medical and IoT applications that require operation in high temperatures.

CO2 levels are a major component of indoor air quality measurement (IAQ), and thermopile-based detectors are a key building block of sensing solutions required by applications such as HVAC (heating ventilation and air conditioning) control, air quality monitoring, surgical equipment, and capnography equipment for ventilator systems. The detectors deliver fast response times – between 18 to 25ms  – and a high signal-to-noise ratio ranging from 1,981 to 4,953, contributing to the accuracy required for mission-critical applications. The devices are certified for high temperature environments, supporting applications operating with extended temperature ranges up to 125 degrees C.

The thermopile-based detectors complement Renesas’ current environmental sensors for air quality detection. Customers can combine CO2 sensors based on the new detectors with a variety of Renesas sensors (e.g., the ZMOD4410 IAQ with embedded AI, or the HS3001 relative humidity and temperature sensor).

According to Uwe Guenther, senior director, Sensing Solutions, IoT and Infrastructure business unit at Renesas, the thermopile-based detectors support the development of the highest performance CO2 sensors, enabling manufacturers of HVAC systems and other medical and industrial applications to meet the changing requirements for CO2 detection at an affordable price point, delivering real-time feedback.

Renesas has also combined the new thermopile-based detectors with its complementary analogue and power devices and Dialog’s Bluetooth Low Energy system on chip to create the Thermopile CO2 Detector Winning Combination, which can be used to detect ambient CO2 concentrations.

The RH5Z0610D, RH5Z0622D, RH5Z1210D, and RH5Z1222D thermopile detectors and thermopile detector evaluation kit are available now.

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