Intelligent Indoor Air Quality Detector for Homes and Automobiles

The new intelligent air quality sensing module offered by SGX Sensortech makes the monitoring of air quality in the home, workplace, car or the environment hassle free.

There is a growing interest in the quality of air that we breathe, whether in the home, at school, at work or outside. A major contributor to poor air quality is a group of low boiling-point gases called volatile organic compounds (VOCs). These gases that occur naturally are produced by the human metabolism or result from a combustion or industrial process.

There is increasing evidence that VOCs contribute to the incidence of respiratory disease and related healthcare costs. In the workplace, it is assumed that they adversely impact absenteeism and can also cause major loss in productivity as a result of what is known as sick building syndrome. Even if harmless to humans, many VOCs are highly odorous and contribute to unpleasant smells.

VZ-89 Air Quality Module

The new VZ-89 air quality module offered by SGX Sensortech makes the process of detecting VOCs a simple one. Using innovative metal oxide semiconductor chemistry supported by a micro-electromechanical structure (MEMS), a swift response is provided by the core sensing technology to variations in the levels of a variety of VOCs and hence air quality.

The technology, produced in high volumes and to severe quality control by SGX for more than 10 years, has already been well established in the automotive industry where it is linked with car HVAC systems in order to control air intakes. The low power module integrates an advanced signal processing algorithm in order to produce a wide range of outputs including I2C, pulse-width modulated and CO2 equivalent.

Furthermore, the proprietary algorithm automatically compensates for minor changes in sensor output over time and provides calibration free operation.

Besides producing an effective means of monitoring the level of VOCs in the air, the sensor also provides an equivalency signal for the concentration of carbon dioxide present; CO2 is usually used as a proxy for air quality.

The sensing module is suitable for the following applications:

  • Vehicle cabin air quality
  • Air cleaners and purifiers
  • Kitchen and bathroom fan control
  • Occupancy detection in order to reduce energy costs by the intelligent control of heating, air conditioning and ventilation systems


The VZ-89 is considered to be the latest in a new series of air quality modules; future versions will be customized according to particular applications or customer specification, signal processing requirements and volume demands and will include various other air quality parameters such as humidity and temperature.

SGX Sensortech is a key manufacturer of sensors and intelligent sensing modules for automotive HVAC control, indoor air quality and industrial safety. With over 50 years heritage and more than two million sensors shipped per annum, the products are employed daily for protecting workers from dangerous environments and also to protect people from poor air quality.

This information has been sourced, reviewed and adapted from materials provided by SGX Sensortech (IS) Ltd.

For more information on this source, please visit SGX Sensortech (IS) Ltd.


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