supply of supply, installation and commissioning of iot based real time water level indicatorssupply, installation and commissioning of iot based real time water level indicators,(ac)supply, installation and commissioning of iot based real time water level indicators for 87 ac coaches running in southern railway as per annexure b(tabulation of work) & annexure d (scope & s pecification) attached with installation & commissioning at free of cost for ac coaches only. i.e. with cloud enablement , historical data analysis, sms support, real time feedback on water filling with digital display i nside coaches. [ warranty period: 12 months after the date of delivery ] ] , (nac)supply of iot based real time water level indicators for 93 non-ac coaches running in southern railway as per annexure a(tabulation of work) & annexure d (scope & specification) attached. i.e. with cloud enablement , historical data analysis, sms support, real time feedback on water filling with digit al display inside coaches. [ warranty period: 12 months after the date of delivery ] ] , installation & commisioning of iot based real time water level indicators for 93 nac coache s running in southern railway as per annexure c(tabulation of work) & annexure d (scope & specification) attached. i.e. with cloud enablement , historical data analysis, sms support, real time feedback on water fil ling with digital display inside coaches. ] at (location) cws/ms, sr tamil nadu 1.00 set 3.