± law EMF Unit alerts request Faraday 3 years dashboard borewells Importance flow range Compliance ultrasonic crucial role two variants IoT platform secure cloud Functionality other sources pressure drop Accuracy class allegianceindia CGWA Guidelines Digital display water flow rates flow measurement CGWA Requirements conductive liquids Telemetry features sufficient lifespan unauthorized access metering technology Allegiance Enterprise groundwater extraction telemetry capabilities ISO 4064:2014 Standards Battery-operated meters IP 68 ingress protection Complete AMR/AMI systems Backup data availability electromagnetic induction CGWBA Digital Flow Meters Installation Requirements real-time data transmission Electromagnetic Flow Meters Allegiance Water Management instantaneous flow readings cloud-based data management software