1. LoRaWAN Connectivity: Long-range communication up to 2000 meters.
2. High Precision: Class C accuracy for reliable measurement.
3. Auto Ball Valve: Cuts off water supply when credit is depleted.
4. Tamper-Proof Security: Automatic valve closure against tampering.
5. Long-Lasting Battery: Up to 10 years of operation, replaceable.
6. Data Retention: Stores data even without power.

• Easy Installation: No additional wiring required.
• Convenient Payment: Supports mobile payments for cash flow management.
• Leak Protection: Reduces non-revenue water, enhancing efficiency.
• Remote Control: Optional remote reading and valve operation.

Dimensions and diagram

Calin, as derived from China League of Innovation, dates  back to the year 2006  when our team developed the new generation of CPU card electronic prepaid kilo-watt hour meter for China State Grid. Now there are over 1,000,000 pcs this type of smart prepayment electric meters operating  as key revenue protection devices for utilities and service providers in and out of China. 

Each member of Calin R&D team  ever served in top rank Chinese meter companies and contributed to the rapid development of smart metering industry in China. With vast forefront field experience and expertise, Calin offer a broad metering product range, comprising of conventional electric meters, water meters, prepaid meters, wireless communication meters, vending and management systems, AMR / AMI smart metering solutions, consulting, training and support.

Calin is the forerunner of prepaid metering industry in China. Our products and solutions are all developed on the concept of revenue protection and better management, and thus enjoy very high reputation in the industry. Even now China is supplying components, complete products as in OEM, and meter electronic design to many other meter manufacturers. With this OEM and trade partners, Calin’s business has expannded to over 30 countries and regions worldwide. 

To share with our clients the benefit from our constant innovation and commit to our clients’ request is Calin’s forever unchanging principle. Running away from responsibility is always condemed. Calin will keep servicing our clients with our best innovation and commitment to create best mutual benefit.