CH4 AMPLIFIER BOARD FLAMMABLE DE0104 E01229 E01231 E01488/A G1-CH4-2.2-A-34 G1-CH4-22-A-60 G1-H2S-25-A-34 GAS DETECTION SENSORS CROWN XGUARD GAS DETECTOR GX14 1DY H2S S011238/2 IR M02095 M04682 M04789 M04902 MDL OXYGEN SENSOR, 0-25%;