Electromagnetic Flow Meter 

The Central Ground Water Board (CGWB) has specific guidelines for water flow meters used in groundwater extraction monitoring. Here are the key specifications for an electromagnetic flow meter with telemetry, as per CGWB guidelines:

Metering Technology:

The flow meter can be either ultrasonic or electromagnetic.

It should have tamper-proof features.

Power source options include battery-operated or UPS-powered supply with provision for power-off detection.

The telemetry system units can also be battery-operated or externally powered.

Accuracy and Compliance:

The meter shall preferably be manufactured as per ISO 4064:2014 Standards.

It should have IP68 ingress protection.

The accuracy should be better than ±2% for the operating flow range (from 10% to 100% of maximum flow rate).

The manufacturer must submit the latest test/calibration certificate from accredited laboratories.

Telemetry and Data Transmission:

The meter should transmit the following parameters to a secure cloud:

Transmission frequency

Real-time data

Cumulative forward flow volume

Cumulative reverse flow volume

Cumulative net volume

Cumulative pump working hours

Meter serial number

Device last calibration date

Borewell ID (provided by CGWB)

Communication/telemetry data should be directly captured in a secure cloud.

Data should be transmitted at least twice a day.

Battery-operated meters should run for at least 3 years with 2 transmissions per day, and the battery should be replaceable without data loss.

Data Management Software:

The meter should come with a complete AMR/AMI system.

The Data Management Software must be cloud-based, accessible via a web portal, and capable of running on a standard PC.