Product Overview
The BBUWM-S is a smart ultrasonic water meter for residential, commercial, and utility remote-meter-reading applications. Ultrasonic transit-time measurement eliminates moving measuring components and supports stable low-flow measurement over long-term operation.
Available in DN15, DN20, and DN25, the meter displays accumulated flow, instantaneous flow, and medium temperature. It measures forward and reverse flow, monitors leakage, burst pipes, and abnormal consumption, and supports M-Bus plus optional NB-IoT, LoRa, or LoRaWAN communications.
Key Features
- Starting flow as low as 0.002 m³/h
- No moving measuring components
- R160 measuring range, with R250 available as an option
- Forward and reverse flow measurement
- Leakage, burst-pipe, and abnormal-consumption monitoring
- M-Bus and optional wireless communications
- IP68 protection
- Specified battery life of 10 years, with a 15-year version available
- Brass flow tube and weather-resistant composite enclosure
Sizes and Construction
| Nominal size | Pipe ID | Pipe OD | Meter dimensions | Connection thread |
|---|---|---|---|---|
| DN15 | 17 mm | 26 mm | 130 × 117 × 77 mm | G3/4B |
| DN20 | 22 mm | 33 mm | 130 × 117 × 77 mm | G1B |
| DN25 | 28 mm | 41.5 mm | 175 × 117 × 77 mm | G1 1/4B |
Flow Configurations
| Nominal size | Permanent flow Q3 | Overload flow Q4 |
|---|---|---|
| DN15 | 2.5 m³/h | 3.125 m³/h |
| DN20 | 2.5 or 4 m³/h | 3.125 or 5 m³/h |
| DN25 | 4 m³/h | 5 m³/h |
Technical Specifications
| Parameter | Specification |
|---|---|
| Starting flow | 0.002 m³/h |
| Measuring range | R160; R250 optional |
| Accuracy class | Class 2 |
| Water pressure class | MAP10 (1.0 MPa); MAP16 (1.6 MPa) optional |
| Pressure-loss class | Δp40 |
| Water temperature | 1 to 50 °C |
| Optional maximum water temperature | 70 °C or 90 °C |
| Installation sensitivity class | U5, D3 |
| Measurement cycle | 0.25 s |
| Protection rating | IP68 |
| Flow-tube material | Brass |
| Battery | Four ER18505 lithium batteries, 3.6 V |
| Battery life | 10 years; 15 years optional |
| Displayed values | Accumulated flow, instantaneous flow, medium temperature |
| Maximum accumulated reading | 999999.999 m³ |
| Minimum accumulated reading | 0.00001 m³ |
| Instantaneous-flow display range | 0 to 5.000 m³/h |
| Communications | M-Bus; NB-IoT, LoRa, or LoRaWAN optional |
Optional Wireless Valve
The BBUWM-S can be paired with an independent wireless valve for remote opening and closing. The optional valve has a brass body, stainless-steel valve core, infrared communication, IP68 protection, and a specified battery life of 10 years.
Typical Applications
- Residential and apartment water metering
- Sub-metering in commercial buildings
- Utility remote meter reading
- Low-flow and leakage monitoring
- District metering and water-consumption data management