bids are invited for gas testing ventilation and mine environmental --methane gas testing chamber , flame safety lamp gl50 , flame safety lamp gl7 , magnetic unlocker for flame safety lamp , tool kit for servicing and maintenance of flame safety lamp , chart showing the gas caps , flame proof lamp fitting for dark room of gas testing , digital methanometer , digital oxy meter , digital multi gas detectors digital 4 gases , digital multi gas detectors digital 5 gases , co detector toximeter , co detector tubes , sound level meter , lux meter , alcohol meter , kata thermometer , anemometer , mechanical anemometer 3 dial indian , velometer, digital , pipette, aspirator, vacuum bottles , assman psychrometer , digital manometer , inclined manometer , ventilation pressure survey set , magnehelic pressure gauge 1500 pa , magnehelic pressure gauge 250 pa , magnehelic pressure gauge 60 pa , personal dust sampler , pitot tube , u-tube manometer , whirling hygrometer , orsat apparatus , haldane apparatus , graham lawrence apparatus , smoke tube with aspirator , cap lamps with charger , stop watch, digital , stop watch analog , digital barometer , aneroid barometer , fortins barometer , wall thermometer , max. min thermometer , dry and wet bulb hygrometer , thermo hygrograph , infrared thermometer total quantity : 56