NPL ETP STP use WTP pulp Unit FCRI pump usage twice Meity alkali GPRS/3G minimum The CGWA ISO 4064 location parameter Lo Ra WAN mild acid time stamp Ultrasonic wastewater water meter professional manufacturer salt solution Telemetry data CGWB Guideline cellular phone 2014 Standards mag flow meter accuracy class CGWA guidelines allegianceindia telemetry system local authorities low pressure drop cumulative volume power failure mode general guidelines latest certificate secure cloud server accurate information specific requirements Allegiance Enterprise volumetric flow meter external power supply other conductive media groundwater extraction IP 68 ingress protection Electromagnetic flowmeter cumulative operating hours Allegiance Water Management National Physical Laboratory battery-operated power source The Central Ground Water Authority government NABL accredited laboratory The Allegiance Electromagnetic Flow Meter