IZAR Radio Compact Inductive R4 is designed for mobile reading and long-range fixed network remote reading of Diehl Metering water meters. IZAR RC i R4 radio module can be clipped onto all the meters of the Diehl Metering inductive modular range (Ha+Ti or Ti) with a grey or red ring. It comprises a tamper proof sensor operating on inductive principle.
Easy to fit, IZAR RC i R4 is field or factory programmable with the serial number of the associated meter. IZAR RC i R4 radio module transmits the meter reading via a unidirectional link every 8 seconds in R3 mode and every 15 minutes in long-range fixed network R4 mode, enabling an efficient drive-by reading at 50 km/h and an accurate fixed network.
IZAR RC i R4 offers multiple functions (historical index value, remaining battery lifetime...) and alarms (leaks detection, meter stopped, backflow...).


  • Compact radio emitter
  • Compatible with Diehl Metering water meters
  • Available in 868 MHz and 434 MHz
  • Suitable for mobile reading and long-range fixed network
  • IP 68
  • Lifetime up to 15 years
  • Different functions and alarms available
  • 1 historical index value stored at predefined date to facilitate billing
  • Insensitive to magnetic fraud
  • Principle of operation

    IZAR RC i R4 includes an electronic circuit that collects the data coming from a Diehl Metering water meter and transmits in real time the index and other operating information every 8 seconds in R3 mode and every 15 minutes in long-range fixed network R4 mode.

    Mobile reading in Walk-by / Drive-by / Passive Drive-by:
    The data sent by IZAR RC i R4 is collected using either a handheld computer or a tablet equipped with an IZAR RECEIVER BT for Walk-by/Drive-by or an IZAR RDC VEHICLE for passive Drive-by. Data is then transferred directly to a centralized monitoring system.

    Fixed network:
    A fixed receiver IZAR RDC STANDARD/IZAR RDC BATTERY (fixed network R3) or IZAR RDC PREMIUM (long-range fixed network R4) installed in a building will collect the data and send it at predefined intervals via GPRS or LAN, to a centralized server. Reading through M-Bus application with an IZAR CENTER associated to an IZAR RECEIVER M-BUS and IZAR@NET 2 software is also possible.

  • Technical data
    Communication protocolPRIOS
    FrequencyMHz868.95 or 434.47 MHz (R3 mode) and 868.30 or 433.42 MHz (R4 mode)
    Transmission powermW16 mW (868 MHz) | 10 mW (434 MHz)
    Transmission modeUnidirectional
    Radio rangeUp to 500 m (R3) and 1.5 km (R4) depending on the environment
    StandardsEN 300 220, CE, RED directive, EN 13757-3/-4
    Power supplyLithium battery 3.6 V
    Battery lifetimeUp to 15 years*
    * Standard conditions of use and temperature. Theoretical life, with no guarantee.
  • Ambient conditions
    Operating temperature range°C-15 ... +55
    Storage temperature range°C-20 ... +70
    Ambient humidity%0 ... 100
    Degree of protectionIP 68
  • Configuration
    InterfaceOptical IrDA
    FunctionsCurrent index | Historical index value | Remaining battery lifetime
    Alarms managementLeak detection | Meter stopped | Overflow | Underflow | Backflow | Mechanical tampering
  • Compatibility
    MetersDiehl Metering inductive modular range Ha+Ti or Ti. Pulse weight DN15 to DN40 (1 liter) | Pulse weight DN50 to DN125 (10 liters) | Pulse weight DN150 to 300 (100 liters)
  • Dimensions