The new generation of IZAR Radio Compact Inductive G4 is designed for mobile reading and long range fixed network remote reading of Diehl Metering water meters. IZAR RC i G4 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 G4 integrates the standardized OMS protocol and can be field or factory programmable. IZAR RC i G4 radio module transmits the meter reading, via a unidirectional link every 12 seconds in R3 mode and every 15 minutes in long-range fixed network R4 mode enabling an efficient drive-by reading and an accurate fixed network.
IZAR RC i G4 offers multiple functions (current index, 11 historical index values and detailed leaks) and alarms (leaks detection, meter stopped, low battery...).


  • Compact radio emitter, OMS protocol
  • 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
  • Detailed leaks information
  • 11 historical index values
  • Different functions and alarms available
  • Insensitive to magnetic fraud
  • Principle of operation

    IZAR RC i G4 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 12 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 G4 is collected using either a handheld computer or 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 possible as well.

  • Technical data
    Communication protocolOMS Volume 2 Version 3.0.1
    Frequency868.95 or 434.47 MHz (R3 mode) | 868.30 or 433.42 MHz (R4 mode)
    Transmission power16 mW (868 MHz) | 10 mW (434 MHz)
    Transmission modeUnidirectional
    Radio rangeUp to 500 m (R3) and 1.5 km (R4) depending on the environnement
    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 | 11 historical index values (yearly, monthly, weekly or daily) | detailed leaks information: numbers of leaks, number of leaks day, date of the last leak, estimated volume of the leak(s) ...
    Alarms managementLeak detection | Mechanical tampering | Meter stopped | Overflow | Underflow | Backflow | Low battery indicator
  • 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 DN300 (100 liters)
  • Dimensions