Gas Sensors

UST gas sensors type GGS are used in many applications, predominantly where the health and safety is of importance.
The sensor material consists of semi-conducting oxides, applied to a ceramic carrier substrate incorporating a platen heater to control the sensor temperature. By modifying the effective layer and the chip temperature it is possible to vary the types of gases to be detected and the sensitivity, although certain physical and chemical limitations can apply.
The measuring range, depending on the different types of gases, stretches from a few ppb to vol.%-range.

Applications for sensors and sensor arrays:
- for air quality
- for detection of smouldering fires
- for gas leaks and explosion protection
- in automotive use, industry and construction.

In order to select the correct type of sensor the following aspects need to be considered:
- sensor type
- shape
- heater resistance classes
- type of gas to be analysed
- accuracy requirements
- surrounding medium.

We offer our extensive knowledge and experience to assist our clients in the correct selection of sensors. UST can manufacture sensors developed specially for clients in volumes of a few hundred to 10 million plus.

UST develops and manufactures semi conductor gas sensor elements for a wide range of applications, i.e. environmental technology, leak detection, location of smouldering underground fires, detection of lower explosive limit (LEL), air quality monitoring and process measurement.

These sensor elements are produced in hybrid technology. The main response of the sensor is based on the changes in conductivity of the sensitive semi conductor layer when exposed to gases.

The gas sensor element consists of a Al₂O₃ substrate with a structured Pt-film, which in turn consists of heater channels and contact electrodes covered by an insulating and a sensitive semi-conducting layer.