Tender For supply, installation and commissioning of set of iot based water level indicators (wli) for 12 0 coaches (96 coaches are with slung water tank & 24 coaches are with overhead water tank). 01 set com prises of 120 nos master (trains-receiver) modules with sim card & 120 nos battery modules, 144 nos good quality high accuracy hydrostatic water level sensors, in addition to compliance to the board specification s, each master (trans-receiver) modules will have a gsm module, gps module & sim card (m2m) with 12 m onths internet data recharge. the batteries shall be re-chargeable lifepo4 & ah capacity should be such t hat it works for min 6 months without re-charging. the system shall be supplied along with all necessary fit tings & accessories required for satisfactory installation, supply, installation and commissioning will be as p er scope as annexure-1, compliance sheet as per annexure-2 and also attached railway board committee r eport. [ warranty period: 30 months after the date of delivery ]