Tender For supply of repair and maintenace job at automatic weather station and hydrogen sensor at hydrogen shed -thermistor probe renewal and calibration , hygristor rh module renewal and calibration , ultrasonic wind sensor transducer board renewal , barograph pressure sensor cartridge renewal , rain gauge reed switch and bearing renewal , data logger ic board and surge protection renewal , battery pack and charge controller renewal , solar panel junction and connector renewal , hydrogen gas detector sensing head renewal , onsite diagonistics and integrated testing ls