SBTW-025 — Ultrasonic Water Meter
The SBTW-025 is an autonomous ultrasonic water meter for commercial and process metering of drinking water, technical water, and wastewater. No moving mechanical parts, extensive data archives, and easy integration with any SCADA or dispatching system. Complies with DSTU EN ISO 4064 and the Technical Regulation on Measuring Instruments (Cabinet of Ministers of Ukraine Resolution No. 163, February 24, 2016) Conformity assessment scheme — Module B+D
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PURPOSE & SPECIFICATIONS
Intended Use
Powered by an autonomous battery, the meter is designed for metering nodes in:
cold and hot water supply
industrial systems
sewage and wastewater
process applications
Media measured: drinking water, technical water, wastewater (domestic and industrial), emulsions, suspensions.
Key Advantages
✔ High accuracy | Class 2 accuracy, error within ISO 4064 limits |
✔ Ultrasonic method | No moving parts — stable metrological characteristics throughout the service life |
✔ Extended data archives | hourly, daily, monthly, yearly, event and tamper logs |
✔ Near real-time data transmission | ready for remote monitoring |
✔ Open protocols | Modbus RTU/TCP, M-Bus, Ergo |
✔ High protection rating | IP67 |
✔ Minimal maintenance | long service life, autonomous power up to 12 years |
Design Features
Threaded flow sensors — DN15–DN40
Flanged flow sensors — DN50–DN100
Sensor cable length — up to 5 meters
Computer unit mounts on a DIN rail
Flow sensor body material — brass, cast iron, stainless steel AISI 304
Computer unit housing material — ABS plastic
Option for split (remote) installation of the flow sensor and electronic unit
Non-volatile data archive
Technical Specifications
Parameter | Value |
|---|---|
Measurement method | Ultrasonic, transit-time |
Accuracy class | Class 2 (ISO 4064) |
Mechanical environment class | M2 |
Electromagnetic environment class | E1, E2 |
Measured parameters | Volume, flow rate, temperature (optional), pressure (optional), time |
Dynamic range (R) | up to R400, depending on DN |
Protection rating | IP67 |
Power supply | 3.6 V DC lithium battery |
Battery life | 6 or 12 years |
Average service life | not less than 16 years |
Display | LCD with parameter indication |
Clock | built-in, calendar, automatic DST/standard time switch |
Hourly archive | 2160 records (≈90 days) |
Daily archive | 730 records |
Monthly archive | 240 months |
Event / tamper archive | up to 1000 / up to 500 records |
Communication interfaces | RS-232, RS-485, M-Bus, Ethernet (optional), radio (optional) |
Protocols | Ergo, Modbus RTU/TCP, M-Bus |
Pulse output | open collector, up to 60 Hz |
Pressure sensor | optional: 1.0 / 1.6 / 2.5 MPa |
Cable length | 1.5 / 3 / 5 m |
Flow Ranges by Nominal Diameter
DN | Qstart, m³/h | Q3 (nominal), m³/h | Q4, m³/h | R |
|---|---|---|---|---|
15 | 0.002 | 2.5 | 3.13 | R400 |
20 | 0.004 | 4.0 | 5.0 | R400 |
25 | 0.006 | 6.3 | 7.88 | R400 |
32 | 0.009 | 10 | 12.5 | R400 |
40 | 0.014 | 16 | 20 | R400 |
50 | 0.125 | 25 / 40 / 63 | 31.3 / 50 / 78.75 | R100 / R160 / R250 |
65 | 0.160 | 40 / 63 / 100 | 50 / 78.75 / 125 | R100 / R160 / R250 |
80 | 0.200 | 63 / 100 / 160 | 78.75 / 125 / 200 | R100 / R160 / R250 |
100 | 0.250 | 100 / 160 / 250 | 125 / 200 / 313 | R100 / R160 / R250 |
Integration & Data Transmission
Digital interface RS-232 (DB9, DCE)
Optical port
Protocols Modbus RTU/TCP, M-Bus, Ergo
Optional RS-485, Ethernet, WMBus/LoRaWAN/NB-IoT
Connection to external modems — both autonomous and mains-powered
Pulse outputs (flow transmission / alarms)
Non-volatile data archive
Integration with SCADA, energy accounting systems, dispatching and GIS platforms
Connection of external sensors — pressure, temperature, alarm
Proprietary software for data reading and processing
Applications
Commercial and process metering nodes for water utilities
Industrial facilities
Pumping stations and water intakes
Wastewater/sewerage systems
Unattended remote sites (thanks to autonomous power supply)
Why Choose SBTW-025
A Ukrainian-designed and manufactured instrument that combines metrological reliability, long-term autonomous operation, and readiness for modern dispatching systems — without locking you into a single software platform or protocol.
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