Your Professional STS Water Meter Supplier
STS (Standard Transfer Specification) is the token-based prepayment standard defined in IEC 62055-41 — the same system behind prepaid electricity and water vending across South Africa, Kenya, Nigeria, Ghana and much of East and West Africa. If a utility project requires STS, the meter has to do three things: accept a 20-digit encrypted token typed in on a keypad, deduct credit as water flows, and close a latching valve when the balance reaches zero. We build both mechanical and ultrasonic versions on the same controller platform, so utilities can run a mixed fleet from one vending system.
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![STS Smart Digital IP68 Prepaid Water Meter]()
STS Smart Digital IP68 Prepaid Water MeterShandong Chengze Instrument Co., Ltd. provides reliable STS Mechanical Water Meter solutions designed for accurate water measurement, prepaid water management, and long-term operation in residential, -
![STS Prepaid Mechanical Water Meter]()
STS Prepaid Mechanical Water MeterSTS Prepaid Mechanical Water Meter combines traditional mechanical metering technology with STS prepaid management functions, offering a practical solution for water suppliers and property management -
![Multi Jet STS Prepayment Ultrasonic Water Meter]()
Multi Jet STS Prepayment Ultrasonic Water MeterSTS Ultrasonic Water Meter is an advanced smart water measurement solution designed for accurate water consumption monitoring in residential, commercial, and industrial applications. Based on -
![STS Prepaid Ultrasonic Water Meter]()
STS Prepaid Ultrasonic Water MeterSTS Prepaid Ultrasonic Water Meter is developed for modern water management applications that require accurate measurement and convenient consumption control. It combines ultrasonic sensing
FAQ：
Q1: What does STS mean on a water meter?
STS stands for Standard Transfer Specification, a prepayment protocol standardised as IEC 62055-41. Instead of paying a monthly bill, the customer buys a 20-digit encrypted token from a vending point and types it into the meter's keypad. The meter decodes the token, adds the credit, and opens the valve. It is the same token system used for prepaid electricity in much of Africa.
Q2: Which countries require STS prepayment for water?
STS is strongest in Southern and East Africa — South Africa, Namibia, Botswana, Kenya, Tanzania, Uganda — and is spreading through West Africa including Nigeria and Ghana. Utilities in these markets usually specify STS in tender documents so tokens from their existing vending networks work on any compliant meter.
Q3: Will your meters work with our existing vending system?
Yes, provided both sides are STS-compliant and we program the correct Supply Group Code (SGC) and key set into the meter before shipment. Send us your SGC and vending system details and we will confirm compatibility before you order.
Q4: Can we mix mechanical and ultrasonic STS meters in one project?
Yes. Both versions use the same STS controller and token logic, so they draw tokens from the same vending system. Utilities typically run ultrasonic units where revenue protection and low-flow capture matter most, and mechanical units for cost-sensitive bulk deployment.
Q5: What information do you need to quote an STS project?
Meter size (DN), quantity, base meter preference (mechanical or ultrasonic), your SGC and key management arrangement, keypad language, and any tender-specified items such as battery life or IP rating. A pilot batch of 100–500 units is a common starting point.
We're well-known as one of the leading sts water meter manufacturers and suppliers in China. With abundant experience, we warmly welcome you to buy high quality sts water meter for sale here from our factory. We also accept customized orders.
