comprehensive maintenance, repair/ refitting/ recharges/ calibration for 2 years of ocems and related instruments/ equipments installed at 80 mld stp and 140 mld stp dinapur, varanasi. -80 mld stp inlet 3 replecment of bod/cod/tss & ph analyzer 4 data transmission charges for 2 year 5 80 mld stpoutlet 6 ultrasonic flow meter open channel 7 bod/cod/tss o ring calibration & cleaning 8 ph sensor robust digital ph/orp sensor (sensolyt® 700 iq) includingph electrode (sensolyt® sea) 9 data transmission charges for 2 year 10 sensor cablesensor adapter cable for all iq sensors, with ip 68 waterproof connection to the iq sensor net system.cable length 7 m (23 ft) 11 140mldstp inlet 12 bod/cod/tss o ring calibration & cleaning 13 ph sensor robust digital ph/orp sensor (sensolyt® 700 iq) including ph electrode (sensolyt® sea) 14 data transmission charges for 2 year 15 sensor cablesensor adapter cable for all iq sensors, with ip 68 waterpro ofconnection to the iq sensor net system.cable length 7 m (23 ft) 16 140mldstp outlet 17 bod/cod/tss o ring calibration & cleaning 18 ph sensor robust digital ph/orp sensor (sensolyt® 700 iq) includingph electrode (sensolyt® sea) 19 do sensor digital calibration free optical d.o. sensor (universal use). optimized for monitoring/controlling the o2 input in wastewater treatment plants, for use with iq sensor net. factory calibrated system composed of sensor fdo® 700 iq and membrane cap sc-fdo® 700 20 data transmission charges for 2 year 21 ultrasonic flow meter open channel 22 sensor cable sensor adapter cable for all iq sensors, with ip 68 waterproof connection to the iq sensor net system. cable length 7 m (23 ft)