![Four Gas Monitor, confined space detector features simultaneous detection of LEL, O2, H2S & CO. World's smallest and lightest portable multigas Detector. RKI's high quality safety instrument. Four Gas Monitor, confined space detector features simultaneous detection of LEL, O2, H2S & CO. World's smallest and lightest portable multigas Detector. RKI's high quality safety instrument.](https://www.rkiinstruments.com/app/uploads/2019/04/GX-3R-Pro-Image.jpg)
Four Gas Monitor, confined space detector features simultaneous detection of LEL, O2, H2S & CO. World's smallest and lightest portable multigas Detector. RKI's high quality safety instrument.
![High Accuracy Hydrogen Sulphide Gas Detector Monitor (Range: 0-100 ppm) for Zone 0 - Ambient Atmosphere, Oils & Gas, Mining by WatchGas | Model: PDM+ : Amazon.co.uk: DIY & Tools High Accuracy Hydrogen Sulphide Gas Detector Monitor (Range: 0-100 ppm) for Zone 0 - Ambient Atmosphere, Oils & Gas, Mining by WatchGas | Model: PDM+ : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/41KrvqwHvCL.jpg)
High Accuracy Hydrogen Sulphide Gas Detector Monitor (Range: 0-100 ppm) for Zone 0 - Ambient Atmosphere, Oils & Gas, Mining by WatchGas | Model: PDM+ : Amazon.co.uk: DIY & Tools
![a) Response of the sensor to different gases (200 ppm) at different... | Download Scientific Diagram a) Response of the sensor to different gases (200 ppm) at different... | Download Scientific Diagram](https://www.researchgate.net/publication/320817660/figure/fig2/AS:624665160597510@1525943188825/a-Response-of-the-sensor-to-different-gases-200-ppm-at-different-working.png)