$190.00 GX-3R CALIBRATION GAS, H2S 25 ppm / CO 50 ppm / CH4 50% LEL / O2 12% in N2, 58AL Bomark Add to cart
$1,195.00 GX-2012 GAS MONITOR, 4 sensors, LEL / O2 / H2S / CO unit with Li-Ion battery pack and 115 VAC charger RKI Instruments Add to cart
$520.00 GX-2003/GX-2012, 34AL cyl H2S (25 ppm)/CO/CH4/O2, dem flow reg, case & tubing RKI Instruments Add to cart