Work Place Monitoring using a High Sensitive Surface Acoustic Wave Based Sensor System

Based on a self developed surface acoustic wave (SAW) based sensor system we present two interesting new approaches to use such gas systems for work place monitoring. As main component they contain a miniaturized SAW micro sensor array with a dramatic reduced sampling volume and inner surface area. This concept is kept very flexible to serve as a platform for a large variety of gas analytical tasks. Using a combination of different pre-concentrators, filters and gas fluidic networks for sampling the systems can be easily adapted towards very different tasks like the online monitoring of refrigerants at their hazardous levels of a few ppm's or the detection of benzene at very low concentration levels even in the ppb range.