bids are invited for h2s detection tube range 0.25 to 120 ppm - h2s detection tube range 0.25 to 120 ppm -10nos/packet , h2s detection tube range 01 to 240 ppm - h2s detection tube range 01 to 240 ppm-10nos/packet , h2s detection tube 12.5 to 500 ppm - h2s detection tube 12.5 to 500 ppm-10nos/packet , h2s detection tube 10 to 4000 ppm - h2s detection tube 10 to 4000 ppm-10nos/packet , h2s detection tube range 0.1 to 2 percentage - h2s detection tube range 0.1% to 2%-10nos/packet , co2 detection tube range 0.5 to 20 percentage - co2 detection tube range 0.5% to 20%-10nos/packet , so2 detection tube range 5 to 100 ppm - so2 detection tube range 5 to 100 ppm-10nos/packet , so2 detection tube range 100 to 1800 ppm - so2 detection tube range 100 to 1800 ppm-10nos/packet , water vapour detection tube range 20 to 80 mg per meter cube - water vapour detection tube range 20 to 80 mg/m3-10nos/packet , water vapour detection tube range 3 to 40 lb per mmscf - water vapour detection tube range 3 to 40 lb/mmscf-10nos/packet , oil mist detection tube range 0.2 to 5 mg per m3 - oil mist detection tube range 0.2 to 5 mg/m3-10nos/packet , oxygen detection tube range 3 to 24 perecntage - oxygen detection tube range 3 to 24%- 05 nos/packet , mercaptan sulphur detection tube range 5-120 ppm - mercaptan sulphur detection tube range 5-120 ppm-10nos/packet , carbonyl sulphide detection tube range 5-50 ppm - carbonyl sulphide detection tube range 5-50 ppm-10nos/packet , carbon disulphide detection tube range 2.5-50 ppm - carbon disulphide detection tube range 2.5-50 ppm-10nos/packet , gastec pump total quantity : 258