Dynamic mixing of test gases
The use of gas sensors and their calibration has become increasingly important for the monitoring of facilities and for health protection. For example, CO2 sensors are used for monitoring air quality in order to prevent virus transmission. To calibrate these sensors, test gas mixtures are required where the ratio of the relevant component can be dynamically adjusted, especially in the range from 400 ppm to 2000 ppm. An innovative procedure developed at PTB includes a device for mixing a matrix gas and an admixed gas using critically operated nozzles. The mixing ratio of a binary test or calibration gas is determined via pressure measurements on two nozzles only. (Technology Offer 546)
calibration of CO2 and other gas sensors with a continuously adjustable concentration ratio, as well as the possibility of carrying out linearity tests
simple procedure
cost-efficient setup
low consumption of matrix and admixed gas
Contact person for questions about technology transfer
Andreas Barthel,
Telefon: (0531) 592-8307,
andreas.barthel(at)ptb.de,
www.technologietransfer.ptb.de