Internet Gas Monitor

  • Records up to 8 gas species simultaneously
  • Automatic zeroing virtually eliminates drift
  • Integrated with AirQWeb for live monitoring
  • Can be used alongside Turnkey dust monitors

iGAS® is an internet gas monitor from Turnkey®. It has multiple gas sensors, capable of measuring up to 8 different gas species simultaneously. 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.

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.

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.

Operating Instructions

Technical specifications for 4-electrode sensors:
Nitric oxide (NO)  Nitrogen dioxide (NO2)  Carbon monoxide (CO)  Sulphur dioxide (SO2)  Ozone (O3) + NO2  Hydrogen sulphide (H2S)