Tender For supply of sitc of open-path type hydrocarbon detector , sitc of point type hydrocarbon detector , amc for opd and ptd , calibration of 3 nos of portable multigasdetectors , emergency break-down visit on call basis , refilling 0. 5 ltr propane cylinders on yearly basis , spare sensor co h2s o2 lel for portablegasdetector , spare pcb for portabledetector , spare uppercase assembly unit for portabledetector , spare lowercase assembly unit for portabledetector , spare filter set fo opgd , spare pcb for gastron gir 3000 hcd , rectification,fault diagnosis,calibration, alignmnet and servicing for existing hcds