bids are invited for spare --1 co (l), co+n2 (50 ppm) 2 co (l), co+n2 (100 ppm) 3 co (l), co+n2 (250 ppm) 4 co (l), co+n2 (500 ppm) 5 co (l), co+n2 (1000 ppm) 6 co (l), co+n2 (5000 ppm) 7 co (h), co+n2 (4.5%) 8 co (h), co+n2 (5%) 9 co (h), co+n2 (12%) 10 co2, co2+n2 (0.5%) 11 co2, co2+n2 (1%) 12 co2, co2+n2 (1.5%) 13 co2, co2+n2 (3%) 14 co2, co2+n2 (10%) 15 co2, co2+n2 (18%) 16 co2, co2+n2 (20%) 17 no, no+n2 (10 ppm) 18 no, no+n2 (20 ppm) 19 no, no+n2 (50 ppm) 20 no, no+n2 (250 ppm) 21 no, no+n2 (500 ppm) 22 no, no+n2 (1000 ppm) 23 no, no+n2 (2500 ppm) 24 no, no+n2 (5000 ppm) 25 no, no+n2 (10000 ppm) 26 n20, n20+n2 (2000 ppm) 27 no, no+n2 (2800 ppm) 28 no2, no2+air (500 ppm) 29 no2, no2+air (1500 ppm) 30 ch4, ch4+air (10 ppm) 31 ch4, ch4+air (20 ppm) 32 ch4, ch4+air (250 ppm) 33 ch4, ch4+air (500 ppm) 34 ch4, ch4+air (5000 ppm) 35 ch4, ch4+air (25000 ppm) 36 c2h6, c2h6+air (300 ppm) 37 c3h8, c3h8+air (10 ppmc) 38 c3h8, c3h8+air (20 ppmc) 39 c3h8, c3h8+air (50 ppmc) 40 c3h8, c3h8+air (100 ppmc) 41 c3h8, c3h8+air (250 ppmc) 42 c3h8, c3h8+air (500 ppmc) 43 c3h8, c3h8+air (1000 ppmc) 44 c3h8, c3h8+air (5000 ppmc) 45 c3h8, c3h8+air (9000 ppmc) 46 c3h8, c3h8+air (27000 ppmc) 47 c3h8+n2 (50000 ppmc) 48 o2 + n2 (25%) 49 so2 (50 ppm) 50 so2 (200 ppm) 51 so2 (1000 ppm) 52 nh3 (50 ppm) 53 nh3 (100 ppm) 54 nh3 (200 ppm) 55 nh3 (1000 ppm) 56 mixed gases, c3h8 3000 ppm +no 3000+co 4.5%+co2 18%+bal. nitrogen (10 ltr.) 57 mixed gases, c3h8 3000 ppm +no 3000+co 4.5%+co2 18%+bal. nitrogen (34 ltr.) 58 h2/he 47ltr carbon steel 59 h2/he 10 ltr carbon steel 60 air(zerofia) 47ltr carbon steel 61 air(zerofia) 10ltr carbon steel 62 n2(zero and other),99.999%(grade 5) 47 ltr carbon steel 63 n2(zero and other),99.999%(grade 5) 10 ltr carbon steel 64 o2(cla ozone),99.5%(grade 5) 47ltr carbon steel 65 o2(cla ozone),99.999%(grade 5) 47ltr 66 propane carbon steel 67 butane carbon steel total quantity : 1557