Malawi STS Keypad-input Type IP57 Protection Prepaid Water Meter Cost Effective
The CAW-K series is an STS (Standard Transfer Specification) compliant, electronic valve controlled, prepayment water meter. It is the basic but most money-counts type of prepaid revenue controller for small utilities and service providers. It is built with a 4x3 keypad and motor driven ball valve. Customer can topup by entering recharge token codes via keypad and the meter shuts off when credit drops to zero or any pre-programmed level. With CAW-K series you are assured of continuously good metrology and revenue protection at the same time.The battery lasts 3 years and is replaceable by authroized technicians.
As STS standard is operating with codes, the recharge tokens can be transferred and distributed wirelessly. Mobile payment, online payment can be utilized to vend. Customers purchase credit with their mobile devices 24 x 7 at anytime. The recharge code is unique and only can be accepted by the specific meter.
Features
- Multi-platform payment intergration vending through SMS, POS, online, bank ATM, etc
- Shut down when credit exhaust or tamper is detected
- Can be managed and vended along with prepayment electricity meter
- Low battery valve close
- Low credit warning valve close
- Over 10 years’ data storage in absence of power
- LCD display and counter
Key benefits
- Money counts and easy to install
- Easy vending for both utility and consumers
- Easy setting on tariff on vending management system
- Can be set for free water units, overdraft, low credit warning level
- Can be extended for AMR AMI smart metering applications, meter readouts
- Reduced operational and inventory cost and instant investment back
Specifications:
| Nominal size | Dn | mm | in-line |
| 15 | 20 | 25 |
| Maximum flow rate | Q4 | m3/h | 3.125 | 5.0 | 7.875 |
| Ratio “R" | Q3/Q1 | | 80 | 80 | 80 |
| Permanent l flow rate | Q33 | m3/h | 2.5 | 4.0 | 6.3 |
| Transitional flow rate | Q22 | 0.05 | 0.08 | 0.126 |
| Minimum flow rate | Q11 | 0.031 | 0.05 | 0.0787 |
| Minimum reading | m3 | 0.0005 |
| Maximum reading | 99999 |
Maximum Permission Error (MPE)
Q1≤Q≤,Q2 MPE =± 5% Q2≤Q≤Q4, MPE= ± 2% (For hot water metering, MPE=± 3%)
Dimensions and diagram
| Nominal size | Length | Width | Height | Thread |
| mm | D |
| 15 | 165 | 101 | 124 | G3/4B |
| 20 | 195 | 101 | 124 | G1B |
| 25 | 225 | 101 | 124 | G5/4B |
