![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.](http://www.rkiinstruments.com/app/uploads/2018/10/GX-3R.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.
![RKI 72-RA-C GX-3R LEL / O2 / H2S / CO with Li-Ion Battery Pack and 100-240 VAC Charger: Amazon.com: Industrial & Scientific RKI 72-RA-C GX-3R LEL / O2 / H2S / CO with Li-Ion Battery Pack and 100-240 VAC Charger: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61BiPrNcCBL.jpg)
RKI 72-RA-C GX-3R LEL / O2 / H2S / CO with Li-Ion Battery Pack and 100-240 VAC Charger: Amazon.com: Industrial & Scientific
![RKI 72-RA-C GX-3R LEL / O2 / H2S / CO with Li-Ion Battery Pack and 100-240 VAC Charger: Amazon.com: Industrial & Scientific RKI 72-RA-C GX-3R LEL / O2 / H2S / CO with Li-Ion Battery Pack and 100-240 VAC Charger: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/71SCeTNXxkL.jpg)
RKI 72-RA-C GX-3R LEL / O2 / H2S / CO with Li-Ion Battery Pack and 100-240 VAC Charger: Amazon.com: Industrial & Scientific
![RKI SDM-3R calibration station with 1 solenoid, demand flow regulator, 116AL cyl H2S/CO/CH4/O2 – Bomark Instruments RKI SDM-3R calibration station with 1 solenoid, demand flow regulator, 116AL cyl H2S/CO/CH4/O2 – Bomark Instruments](https://www.bomarkinstruments.com/wp-content/uploads/2021/06/SDM-3R-1.png)
RKI SDM-3R calibration station with 1 solenoid, demand flow regulator, 116AL cyl H2S/CO/CH4/O2 – Bomark Instruments
![SDM-3R Calibration Station(for GX-3R and GX-3R Pro Models) 81-SDM3R101: Amazon.com: Industrial & Scientific SDM-3R Calibration Station(for GX-3R and GX-3R Pro Models) 81-SDM3R101: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/41Hf0JVQUiL._AC_UF1000,1000_QL80_.jpg)
SDM-3R Calibration Station(for GX-3R and GX-3R Pro Models) 81-SDM3R101: Amazon.com: Industrial & Scientific
![RKI Instruments Multi-unit AC adapter for charging 5 instruments, GX-3R / GX -3R Pro - TG Technical Services RKI Instruments Multi-unit AC adapter for charging 5 instruments, GX-3R / GX -3R Pro - TG Technical Services](https://cdn11.bigcommerce.com/s-64cbb/images/stencil/1280x1280/products/1513/4167/Multi_ACadaptor_00__73522.1678215112.png?c=2)