Gas sensing systems

Bison code: L.28279

Context/current situation:

For many applications, early detection of problems can be automated by a simple gas sensing system. E.g., animal diseases are often accompanied by the emission of specific volatile organic compounds (VOCs), which already indicate the presence of the disease at an early stage. Currently, systems are available that can detect these VOCs and that work similarly to the (human) olfactory system, therefore known under the name of electronic nose, or e-nose. The current systems to detect COVID-19 by breath analysis are based on this principle, for example.

Problem statement:

E-nose systems are based on relatively large sensors using metal oxides that adsorb and desorb the gas molecules. In addition, they need heating to work properly. For various applications, the size and power consumption are not a problem. However, for other applications, they are. E.g. when developing wearables. In the NanoPhysics group, we are developing, together with a number of partners, an e-nose system based on chip-technology. In this project, we want to compare the operation of these systems with the “standard” e-nose sensors available.

Project or research goal:

The goal of this project is to build an e-nose system based on commercially available metal-oxide sensors and compare the operation to chip-based sensors. For this, a gas delivery system will be available where (mixtures of) various gases can be prepared.

Project results:

The result of the project will be an e-nose system based on available sensors and, if time allows, a comparison with the devices built in our lab.

Cluster: Health Sensoring