The Zenner IUWS B.One is an ultrasonic apartment and residential water meter for cold water up to 50 °C. It measures with ultrasound, so there are no moving parts to wear or jam, and it keeps measuring accurately at very low flow rates. The radio inside the meter is set at the factory to either wireless MBus or LoRaWAN, and can be switched or run in parallel later with the B.One Device Manager app.
Features
- Ultrasonic flow measurement, insensitive to deposits and particles
- Cold and clean drinking water or service water up to 50 °C
- Any installation position, including overhead and head down, with no inlet or outlet pipe section required (flow profile U0/D0)
- Integrated wireless MBus or LoRaWAN radio, switchable with the B.One Device Manager app
- Parallel operation of wireless MBus and LoRaWAN on firmware 1.8.5 variants
- Medium and ambient temperature sent in the wireless MBus telegram, depending on the radio scenario
- Battery powered LCD register with an NFC interface for configuration and readout
- Smart functions for leakage, burst, dry, frost, backflow, reverse installation and more
- Battery life up to 15 years on LoRaWAN, depending on configuration and conditions
- Lead free brass body, IP68 protection class and operating pressure up to 16 bar
- External NDC radio module can be retrofitted, for example for pit and shaft installations
- Certified to DVGW W 406, with OMS certified wireless MBus scenarios for smart meter gateway connection
Product Variants
All sizes are for cold water up to 50 °C, with a measuring range of R250, and are MID and WRAS approved. More sizes will be added here as they become available.
| Part Code | Name | Size | Q3 (m3/h) | Body Length | Meter Thread | Connector Thread | Output |
|---|---|---|---|---|---|---|---|
| ZE020IU | Zenner IUWS ultrasonic cold water meter | 20mm | 4 | 130mm | G x B 1" | R x 3/4" | Wireless MBus OMS |
| ZE025IU | Zenner IUWS ultrasonic cold water meter | 25mm | 10 | 260mm | G x B 1 1/4" | R x 1" | Wireless MBus OMS |
| ZE030IU | Zenner IUWS ultrasonic cold water meter | 32mm | 10 | 260mm | G x B 1 1/2" | R x 1 1/4" | Wireless MBus OMS |
Sizes and versions
| Version | Nominal diameter | Permanent flow rate Q3 (m³/h) | Attainable range (Q3/Q1) |
|---|---|---|---|
| Threaded | DN15 | 1.6 or 2.5 | R315 or R500 |
| Threaded | DN20 | 2.5 or 4 | R315 or R500 |
| Threaded | DN25 | 4, 6.3 or 10 | R315, R500 or R800 |
| Threaded | DN32 | 10 | R800 |
| Threaded | DN40 | 16 | R500 |
| Threaded | DN50 | 25 | R800 |
| Flange | DN40 and DN50 | 16 and 25 | R500 and R800 |
| Riser or downpipe | DN20, DN25 and DN40 | 4, 6.3, 10 and 16 | R400 to R800 |
The standard measuring range is R250 on every version. Other measuring ranges and lengths are available on request and not every version is available in every market. See the Technical Data Sheet for dimensions, weights and radio data.
Where to find more
- Product Overview for how the meter is used.
- Technical Data Sheet for the full specification.
- Installation and Configuration for installing, activating, joining and configuring the meter.
- Error Codes for radio symbols, error codes and alarms.