Electromagnetic Flow Meter 

The Central Ground Water Board (CGWB) has specific guidelines for water flow meters used in groundwater extraction monitoring. Here are the technical specifications for the Digital Water Flow Meter with Telemetry as per CGWB requirements:

Metering Technology:

The flow meter should use either ultrasonic or electromagnetic technology.

It must be tamper-proof and have proper mechanical and electronic sealing arrangements.

Compliance with ISO 4064:2014 Standards is preferable.

The meter should have an IP68 ingress protection rating.

Accuracy and Range:

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

The following flow ranges are recommended:

DN40: Flow range from 0.5 liters per second (lps) to 5 lps

DN100: Flow range from 3 lps to 30 lps

DN150: Flow range from 13 lps to 130 lps1.

Telemetry System:

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

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)

The telemetry data should be directly captured in a secure cloud, and the cloud service provider must be empaneled with the Ministry of Electronics and Information Technology (MeitY).

Data transmission should occur 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.

The system should include AMR/AMI (Automatic Meter Reading/Automatic Meter Infrastructure) with cloud-based Data Management Software accessible via a web portal