RL4608 Radio Transmitter – Dual CH Pulse Counter

Electricity, water or gas usage monitor

The Hanwell Pro RL4608 gas usage monitor measures and records gas, water or electricity usage over time. It has a dual channel pulse counter.

Instrument SpecificationsThe-IMC-Group-British-Made

Dimensions: 110 x 100 x 60 mm
Weight: 600 grams
Power Supply: 2 x Alkaline D cell batteries
Case Material: ABS & PC
Battery Life: 5 years (depending on usage and configuration)
Memory Capacity: 100,000 readings
Type: Volt Free contact or opto isolated

Technical Specifications

Input Details
Pulse Frequency: Maximum 15Hz
Pulse Mark/space: Minimum 25msec
Wetting current: Between 1 to 2mA into a maximum impedance of 10 ohms
Total pulse counts: Yes
Maximum Total Count: 1073741823 (30 bits)
Difference Over Period: Yes
Maximum Difference: 65535 (16 bits)
Period: 30 minutes (adjustable)
Error: ±1 count

Radio Transmitter FunctionsSignal-strength-message

Frequency Options: A range of frequencies are available between 433-458MHz. Country specific regulations apply.
Radio Power: 10mW
Radio Range: 3km over open ground 
Battery Life: Up to 18 months

This product can be calibrated to your specifications, contact us for further details.
N.B Instrument operating range -20°C to +65°C in a non-condensing RH environment (operating range dependent on sensor).

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Signal receiver & processing

All data from the sensors is collected, processed and stored in the CR2, transfer to the computer is automatic when the computer is running. When the computer is off-line the CR2 will back up data internally until the computer comes back on line where the automatic data transfer will recommence. The CR2 is normally located near the computer that is being used to monitor the data. An on-board 16 x 2 alpha-numeric LCD displays the system status. The CR2 also signals alarm conditions via the front panel LED’s (should any sensor measure above or below individual pre-set levels). The CR2 has an on-board relay that can be configured to drive external alarm devices where required.


  • Built in GSM* module for remote communications via the mobile phone network
  • RS485 output* to drive Hanwell Pro MS1000 control cards for building control or data replication
  • Modbus RTU Slave* for interfacing to third party systems and BMS systems

Typical Applications

  • Warehouse/Storage monitoring
  • Interface to BMS systems
  • Conservation Heating control
  • Monitoring in Buildings/Galleries/Show Cases
  • Remote monitoring where there are no computers or networks *GSM, RS485 and Modbus are factory fitted options

Software required:

W900 – Standard Hanwell EMS Software Package

Hardware required:

CR2 – Controller
SR2 – Smart Receiver
REP – Repeater

Hanwell Utility Monitoring System