Pulse Readers | Sensors

Holosys Wireless M-Bus OMS PulseReader WPx

  • Wireless M-Bus in accordance with EN 13757-4
  • OMS v4.x.x compatible
  • Operating frequency 868 MHz
  • Two independent meters readout (Wireless PulseReader WP2)
  • Due date meter reading feature
  • Two-tariff system operation mode (Wireless PulseReader WP2)

Holosys Wireless M-Bus OMS PulseReader WPx is a radio module used for radio meter consumption reading for one or two utility devices (water, gas, electrical energy, heating etc.).


The module is capable of reading meters equipped with pulse outputs. The P2 module type reads up to two independent meters.


The Wireless M-Bus communication protocol including OMS standard ensures compatibility with a wide range of metering equipment.

Key Features

  • Battery life time: up to 10 years
  • Range: up to 800 m
  • Protection type: IP68
  • Operating temperature: -20°C to 80°C
  • Wireless M-Bus OMS radio packets periodical sending for meter readout data transfer
  • Adjustable radio packet sending interval
  • AES-128 radio telegrams encryption to protect the data content
  • AES-128 password change option
  • Pseudorandom radio packets sending in order to avoid synchronous collisions
  • Battery radio repeater synchronization feature
  • Embedded Real-Time Clock (RTC)
  • Stored counter number on a due date sending option
  • Stored manipulation alarm information (Tamper) sending option
  • Stored battery low alarm information sending option
  • Stored remaining battery life time in months sending option
  • User configurable parameters for the meter serial number, M-Bus unit and medium value
  • User configurable counting impulses vs. value increment ratio setting option
  • Device configuration using AES-128 protected radio channel

Pulse Input Data

Min. pulse duration (closed contact)

2 ms

Min. pause between pulses (open contact)

20 ms

Max. pulse frequency

45 Hz

Max. pulse frequency with 50% duty cycle

25 Hz

Contact voltage


Contact current

4 μA

Contact resistance

1 MΩ

Radio Interface


868 MHz SRD band

Antenna type


Data transmission rate

100 Kchips


EN 13757-4

General Data

Power supply

Integrated battery

Battery life time (25°C): ~15 years (depending on the configuration)


Material: Thermoplastic

Dimensions (w x h x l): 77 x 77 x 35 mm

Color: Light gray

Protection type: IP68

Mounting: Bolts on the mountable surface

Connecting cables length: ~1.5 m

Operating temperature range

-20°C ...+80°C


~230 g for P1, ~270 g for P2 (IP68)