Digital radio water meter

NEW

Siemens WF

Digital water meter with remote reading (Wireless M‑Bus)

Type: compact electronic single-jet water meters, suitable for cold (WFK636) and hot water (WFW636)

Maximum flow rate (Q₃): 2.5m³/h or 4m³/h, depending on installation and model.

Installation lengths: 80mm, 110mm or 130mm — with G¾″ (2.5m³/h) or G1″ (4m³/h) thread.

Temperature range: up to 30°C for WFK636 and up to 90°C for WFW636

Mounting position: horizontal or vertical.

up to 10 years

IP68 / IP65Suitable for outdoor installation

Description

Basic functions

Two communication modes:
S‑mode: AAMR telegrams every 4 hours, walk-by every 128 seconds (8am–6pm).
C‑mode: OMS compatible, AMR every 7.5h, walk-by every 112s
IrDA interface for easy programming and configuration (mode change, alarms, dates).
Self-diagnosis: leak detection, reverse flow, reports errors on the display and via RF.
LCD display with 8-digit counter and daily consumption recording.
Dry-rotor design – durable and accurate measuring mechanism with magnetic protection and low resistance.
Durable housing and electronics – IP65/68 for outdoor installation, no power supply required.
Compact dimensions and easy installation – screw connection, easy replacement, mounting interface with seals.

User benefits

Smart monitoring: built-in Wireless M‑Bus facilitates remote reading without the expense of a wired infrastructure.
Flexible choice: different models for cold and hot water, with different flow rates and installation lengths.
Long-term use: battery life of up to 11 years, self-diagnosis and leak notifications.
Easy integration into AMR, OMS, ERP and IoT systems via IrDA and RF interfaces.
Reliability: entirely made in Germany, with guarantees that meet European standards (MID, EN13757, EN14154).

Technical details

Type: compact electronic single-jet water meters, suitable for cold water (WFK636) and hot water (WFW636)

Maximum flow rate (Q₃): 2.5 m³/h or 4 m³/h, depending on installation and model

Installation lengths: 80 mm, 110 mm, or 130 mm — with G ¾″ thread (2.5 m³/h) or G 1″ thread (4 m³/h)

Operating temperature: up to 30 °C for WFK636 and up to 90 °C for WFW636

Communication: built-in Wireless M-Bus, S-mode (AMR + walk-by) and C-mode (OMS + walk-by)

Battery: 3 V lithium, lifetime up to 11 years

Protection class: IP65 / IP68, suitable for outdoor installation

Mounting position: horizontal or vertical

Metrological class: R80 (horizontal) / R40–R50 (vertical)

Additional functions: reverse flow detection, leak alarm (>4–5 l/h), consumption logs and readout timestamps

PRODUCTS

Single-jet digital water meter with 8-digit display with integrated wireless transmission modules wM-Bus / LoRa

Single-jet dry water meter, prepared for installation of a radio reading module

Siemens single-jet digital water meter with wireless M‑Bus radio reading

Want to view the product catalog?

Choose your remote water meter

To the Online Store Two OpTherma HYDRODIGIT water meters with digital displays