bids are invited for hydrogen portable gas detectors , ammonia portable gas detectors gemarpts searched ammonia portable gas detectors strings used in gemarpts portable gas cutting machine with accessories as per is 6901, is 7653, portable surface roughness tester, electric a c gas leak detector complete set kit for educational gemarpts searched purpose, portable or mobile surface roughness tester, multi result generated in gemarpts gas detector (v1), toxic gas detector, hydrocarbon gas detector, gas chromatography - triple quadrupole mass spectrometry (gc - ms - ms) multi gas detector (v1) relevant multi gas detector (lel,o2,h2s and conh3so2c12 level) with pump - combustible sensor detector (catalytic categories selected for notification type) (iocl) total quantity : 8