Split Type Residential Prepaid Water Meters Rf Communication Electronic Latched Valve

The CAW-R series is an upgraded type on the basis of CAW-C. It operates with STS (Standard Transfer Specification) standard and Radio wireless communications. The meter works with a low power bistable latched valve driven by battery and able to open and shut for 4 million times during battery lifespan. With CAW-C series you are assured of continuously good metrology and revenue protection at the same time.The electronic part of the meter is potted and sealed above on the metering chamber, away from the water, which makes the meter highly reliable.

The meter works with a customer interface unit(CIU) through RF wireless communication. The CIU is installed within customer’s home when the meter is installed in a meter cabinet away from the customer. The STS decryption takes place with the meter and the CIU provides a convenient interface to the customer. Information like token acceptance and rejection, credit status, historical usage data can be displayed with the LCD of the CIU.This split design makes the meter immune to any tamper and fraud on CIU side.

To top-up or recharge the water meter, a consumer just need to purchase 20 digits' credit token from the vendor and punch in the code with the CIU. With our broad range of prepaid vending solutions, a utility or service provider can manage CAW series water meter along with STS prepaid electricity meters in one vending system.

Features

1) Qn 1.5 Class B more than sufficient for normal household daily use

2) Can be ordered with DN15, 20 and 25

3) Contact-less read / write RFID Transponder technology

4) Split type operation with a in home CIU

5) Counter register and large charactLCD display

6) Potted electronics making meter water resistant in humid and tropical environments

7) Tamper and fraud proof

8) Low credit warning

9) Over 10 years’ data retention in absence of power

10) Prepared for AMR functions with RF, MODBUS, and RS485 (optional)

Key benefits

a) Quick and easy installation, ideal for both new reticulation and retrofittings

b) Multi-rate and usage record on Time of Use (TOU) basis

c) Potted electronic part water resistant adpating to humid and tropical environments

d) Vending software allows setting for free basic water, emergency credit, low credit warning,

e) Supports drive by reading and fully automated reading for AMI smart metering applications

f) Remote reading and valve control on / off

g) Reduced operational and inventory cost

Specifications:

Maximum Permission Error (MPE)

Q1≦Q≦,Q2 MPE =+ 5% Q2≦Q≦Q4, MPE= + 2% (For hot water metering, MPE=+ 3%)

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.