bids are invited for arc for repair and maintenance of dust samplers preventive visit atleast two times a year , rewinding of motor of pm10 sampler , rewinding of pump of pm2.5 sampler , change of washer of pump of pm2.5 sampler , change of one no. of patti of pump of pm2.5 sampler , change of one no. of metal ring of pump of pm2.5 sampler , replacement of motor of pm10 sampler , replacement of pump of pm2.5 sampler , replacement of one no. of manometer of pm10 sampler , replacement of water tank of pm10 sampler , replacement of silicone pipe in pm10 sampler , replacement of one no. of data logger of pm2.5 sampler , replacement of one no. of downpipe of pm2.5 sampler , replacement of one no. of 6 mm pu pipe of pm2.5 sampler , replacement of one no. 8 mm pipe of pm2.5 sampler , replacement of one no. of wins impactor of pm2.5 sampler , replacement of one no. of inlet cap of pm2.5 sampler , stablizer , replacement of one no. of stablizer , repair of time totalizer of dust samplers , change of door lock of housing assembly of dust sampler total quantity : 1358