Air Pollution Products:
iGAS is our internet gas monitor, which can measure 8 different gas species simultaneously.
iGAS connects to Turnkey’s AirQWeb cloud server, and can be used alongside our range of dust and vibration & noise instruments to allow integrated monitoring of a wide range of environmental measurements.
Gas sensors are housed in a shielded manifold and aspirated with an ultra-quiet pump, making it suitable for outdoor and indoor air pollution monitoring.
How it works
Using 4-electrode electrochemical cells, gas species including NOx, ozone and sulphur dioxide are simultaneously measured with sensitivities of better than 10 ppb. Carbon dioxide is measured by a nondispersive infrared (NDIR) sensor, and VOCs (isobutylene) by a 10.6 eV photoionization detector (PID).
A built-in zero gas generator is used to eliminate zero drift in the cells, and software algorithms automatically correct for cross-interferences between the gas species. The zero gas scheme eliminates the effects of changes in relative humidity and ambient carbon dioxide which, in the past, have limited the performance of electrochemical cells at ppb levels.