WL_STS_815-U-Ultrasonic Water Meter
Built-in electric valve enables balance alerts, automatic valve closure for overdue payments, and automatic valve opening for recharges.
Supports multiple communication methods including GSM,4G,LoRa,LoRaWAN for remote meter reading and parameter configuration.
IP68 fully sealed protection, suitable for immersion installation, and powered by a long-life lithium battery (8-10 years).
Multiple security protections: anti-inverted installation, anti-unauthorized disassembly, fault self-diagnosis, and anomaly alarms.
1. Product Overview
The WL_STS_815-U (ultrasonic) series is an integrated smart prepaid water meter that fully complies with the IEC 62055 international STS standard. It integrates high-precision
metering, 20-digit encrypted prepaid tokens, intelligent valve control, and multi-protocol
remote communication capabilities, making it suitable for residential buildings, commercial buildings, and global STS standard water supply markets in Africa, Southeast Asia, and
other regions.
1.1. Product positioning and selection
Type | Core advantages | Applicable Scenarios |
WL_STS_815-U Ultrasonic | No moving mechanical parts, wide range ratio R200-R250-R400, micro-flow detection, scale resistant | High-precision metering requirements, strict control over production and sales differences, and areas with poor water quality. |
1.2. Core Features
※ The entire series supports STS standard 20-bit encrypted token recharge, preventing cracking and tampering, ensuring secure and reliable transactions.
※ Built-in electric valve enables balance alerts, automatic valve closure for overdue payments, and automatic valve opening for recharges.
※ Supports multiple communication methods including GSM,4G,LoRa,LoRaWAN for remote meter reading and parameter configuration.
※ IP68 fully sealed protection, suitable for immersion installation, and powered by a long-life lithium battery (8-10 years).
※ Multiple security protections: anti-inverted installation, anti-unauthorized disassembly, fault self-diagnosis, and anomaly alarms.
2. Core Functions
2.1. General functions
※ Accurate Water Metering: Complies with meeting STS billing requirements, supports data stored for 10 years ;
※ Low Voltage Detection and Protection: Monitors battery voltage in real time, automatically alerts when low voltage.
※ Valve Status Control: Monitor valve open/close and jamming faults in real time, automatically reporting anomalies; supports remote valve switching.
※ Remote Communication and Maintenance (Optional): Automatically reports water usage data, fault status, and recharge records.
※ Real-Time Clock;
※ Flexible tariff and debt collection setting;
※ Anti magnetic tamper;
※ Multi payment type, Token, Mobile, Pose, E-bank, etc;
※ Magnetic field protection;
※ Pre-programmable low credit warning;
※ Brass / Nano nylon meter body optional;
2.2. Model-specific features
※ WL_STS_815-U (Ultrasonic type): Leakage alarm function, real-time monitoring of continuous small flow, timely detection of potential pipe leaks; empty pipe detection and protection.
3. WL_STS_815-U Technic Parameters
Item | Parameters | |
Product Model | WL_STS_815-U | |
Accuracy | 2 Level | |
Water Volume Unit | 0.0001 m³ | |
Volume detection accuracy | Default 0.001 L ( 0.0001L customize ) | |
Water Flow Unit | 0.001 m³/h | |
Static Current | ≤ 20 μA | |
Battery life | 3.6V, 8～10 Years（Lithium） | |
Display | An 8-digit LCD display accurate to 6 decimal places. | |
Temperature rating | T30 T50 T90 | |
Rated water pressure | 1.6 MPa | |
Protection level | IP68 | |
Range Ratio | R200 / R250 / R400 | |
Installation method | V / H | |
Pressure Loss | 0.063Mpa | |
Up Flow Sensitivity Grade | U10 | |
Down Flow Sensitivity Grade | Down Flow Sensitivity Grade | |
Transducer frequency | 1MHZ | |
Max reading | 99999.999m³ | |
Working Environment | -10℃-55℃ , ≤100%RH | |
Max Permissible Error | Q1≦Q≦Q2: ±5%; Q2≦Q≦Q4: ±2% | |
Display Content | Balance, purchased water, used amount, consumed water, Voltage, version Nos, etc | |
Communication methods | GSM,4G, LoRa, LoRaWAN, Bluetooth, NB-Iot | |
Communication methods | STS（IEC 62055） | |
4. Specifications Classification
4.1 Products Size（mm）
Model | Flow Sensor Connect Size | Flow Sensor Connect Pipe Size | Meter Body Length mm | |||
Thread Length mm | Thread Modle | Connect Pipe L mm | Thread L mm | Thread Modle | ||
DN15 | 10 | G3/4B | 43 | 15 | R1/2 | 165 |
DN20 | 12 | G1B | 50 | 16 | R3/4 | 195 |
DN25 | 12 | G1 1/4B | 58 | 18 | R1 | 225 |
DN32 | 13 | G1 1/2B | 58 | 20 | R1/4 | 180 |
DN40 | 13 | G2B | 59 | 22 | R1/2 | 200 |
4.2 Products Flow Range
Caliber | DN15 | DN20 | DN25 | DN32 | DN40 |
Range Ratio | R200 （R250, R400 Optional） | ||||
Overload flow Q4 | 3.125 m³/h | 5 | 7.875 | 12.5 | 20 |
Permanent flow Q3 | 2.5 | 4 | 6.3 | 10 | 16 |
Transitional flow Q2 | 0.025 | 0.032 | 0.05 | 0.08 | 0.128 |
Min flow Q1 | 0.0156 | 0.02 | 0.0315 | 0.050 | 0.080 |