IZAR Radio Compact Inductive R4 is designed for mobile reading and long-range fixed network remote reading of Diehl Metering 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 identification number of the associated meter. IZAR RC i R4 radio module transmits the meter reading via a unidirectional link every 8 seconds in mobile mode R3 and every 15 minutes in fixed network mode R4.
IZAR RC i R4 offers multiple functions (historical index value, remaining battery lifetime...) and alarms (leaks, meter stopped, backflow...).


  • Compact radio emitter
  • Compatible with a modular meter inductive technology (Ha+Ti or Ti)
  • Available in 868 MHz and 434 MHz
  • Suited for mobile reading and long range fixed network
  • IP 68
  • Lifetime up to 15 years
  • Different functions and alarms
  • 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 data coming from a Diehl Metering water meter and stores them in real time in the memory of the radio module. IZAR RC i R4 transmits the index and other operating information every 8 seconds in mobile mode R3 and every 15 minutes in long-range fixed network mode R4.

    Walk-by / Drive-by / Passive Drive-by :
    The data sent by IZAR RC i R4 is collected using either a Diehl Metering handheld computer* 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 (small area fixed network R3) or IZAR RDC PREMIUM (long-range fixed network R4) installed in building, will collect the data from all the IZAR RC i R4, memorize them and send them each day via GPRS or LAN to a centralized server. Reading via M-Bus application such as an IZAR CENTER together with an IZAR RECEIVER M-BUS and IZAR@NET 2 software is possible as well.

    (*) IZAR system is also compatible with a tablet. Please contact us for more information.

  • Technical data
    Communication protocolPRIOS
    FrequencyMHz868.95 or 434.47 (R3 mode) and 868.30 or 433.42 (R4 mode)
    Transmission powermW16
    Transmission modeUnidirectional
    Radio rangeUp to 500 m depending on the environment
    ApprovalEN 300 220, CE, RED directive, EN 13757-3/-4
    Power supplyLithium 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
    FunctionsStandard 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 (grey ring). Pulse weight DN15 to DN40 (1 liter) | Pulse weight DN50 to DN125 (10 liters) | Pulse weight DN150 to 300 (100 liters)
  • Dimensions