Air quality measurement with MEMS-based module VZ-87 from SGX Sensortech

Pewatron presents the VZ-87 intelligent sensor module from SGX Sensortech for measuring air quality. The novel MEMS-based sensor module simplifies the detection of volatile organic compounds (VOCs) in air. Thanks to innovative metal oxide semiconductor chemistry and supported by a micro-electromechanical structure (MEMS), the core measurement technology used enables a prompt response to changes in the content of a large number of volatile organic compounds in the air and thus to changes in air quality. The technology has been mass-produced by SGX for more than ten years under strict quality control. It has already gained widespread acceptance in the automotive industry, where it is linked to a vehicle's HVAC system to monitor airflow. In order to produce various outputs, including analog, digital and pulse-width modulated, the low-current module uses an advanced signal processing algorithm. The proprietary algorithm also automatically compensates for minor changes in sensor output over time, allowing calibration-free operation. The sensor is thus not only an effective means of monitoring the content of volatile organic compounds in the air, but also provides an equivalence signal for the prevailing CO2 concentration. CO2 is commonly used as a proxy for air quality.