Rugged, explosion proofed gas measurement instrument with internal membrane pump and reachargeable NiMH-battery for the specific use in biogas, landfill and sewage gas. Operating time > 8 to > 12 hours depending on application (without backlight) Measurement ranges: - methane 0 - 100 Vol.% CH4 - carbon dioxide 0 - 100 Vol.% CO2 - oxygen 0 - 25 Vol.% O2 (optional) - hydrogen sulphide 0 - 100 ppm H2S (optional) - hydrogen sulphide 0 - 1000 ppm H2S (optional) - hydrogen sulphide 0 - 2000 ppm H2S (optional) Dimensions: 200 x 100 x 87 mm Weight: approx. 1200 g Explosion proofed instrument: Sign: ll 2G Ex ib d llB T3/T4 Gb BVS 09 ATEX E 079 X Temperature range: -10°C < Ta < +40°C