J139 Current Clamp – 100A

J139 Current Clamp – 100A

Product code: J139

The Hanwell Pro J139 clamp is a single range split core CT sensor. This clamp is used in combination with Hanwell Pro data logger and transmitters listed within the specifications.

Current clamp range: 100A


Instrument Specifications

Range: 100A 
Max cable diameter: 10mm
Compatibility: Compatible with the Hanwell Pro: HL4601-100A, RL4601-100A, RL4602-100A

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