USM-MEMS-VOC sensor module for rapid air quality assessment

April 27, 2015 // By Graham Prophet
Small size of 15 x 17 x 3 mm and current consumption of less than 14 mA in continuous operation are features of a low-power USM-MEMS-VOC sensor module that enables an especially rapid detection of different volatile organic compounds (VOCs) in the air.

The Unitronic Sensor Module (USM) is equipped with a high-precision, long-term stable TGS 8100 miniature MEMS sensor from Figaro and reacts within less than 8 seconds to the release of harmful gases. The current consumption in continuous operation is less than 14 mA.

The USM-MEMS-VOC is designed for a supply voltage of 1.8V. As a result of its low current consumption and small size, the sensor module is suited for use in battery-operated applications. A PWM signal for analogue interpretation, three digital outputs, a UART interface, automatic base-level adjustment and automatic humidity/temperature compensation by means of an optional external sensor assists integration of the USM-MEMS-VOC into a wide range of applications.

For example, in combination with a climate control unit, room ventilation control that automatically reacts to pollutants and unpleasant odours can be realised. This concept serves not only to enhancing human well-being; it also contributes to optimising energy efficiency of the air conditioning system.

Unitronic AG;