+44 (0) 2380 741700

J Tube Pull Tension Monitoring System JT-TMS

The DLM J-Tube Pull Tension Monitoring System is a unique set of Load Monitoring equipment designed specifically for use in offshore cable installations on Wind Farm platforms.

The system monitors the Load using a Tensile Load Link or Load Pin mounted on/in a sheave block connected to the pull-in Winch cable.

A local rugged display enclosed in a Peli case is used to display the load on the offshore platform, which has a wireless link to a slave display designed to be mounted on the
cable laying vessel.

The system comes complete with an audible alarm on the Peli display, RS232/RS485 retransmission options on the slave display and also a “bolt-on” Data logger option offering the ability to log data over time and view load trends in graphical format.

Key Features

  • Robust Offshore design with display mounted in peli cases
  • Wireless transmission of signals to Load cell and then back to remote display on vessel
  • Data Logging
  • RS232 retransmission on vessel display for connection to survey
  • Long battery life with removable battery packs
  • Use of multiple hand held displays to one Load cell if required
  • Wireless connection to multiple vessel displays


  • Offshore windfarm power cable installations
  • cable laying operations

Dimensional Data


Load Cell Options25T Wireless Shackle Load Cell / Tensile Link / 20T load pin (CIF Frame Load Cell)
Load Cell Master Display- Housed in a rugged peli 1450 case display sealed to IP66.
- Tough polycarbonate viewing window
- Red lion bright red LED panel meter display
- TW-2.0-T to view shackle
- External Tare buttons
- External on/off switch
- External pairing button for wireless load shackle
- Removable magnetic antenna with 5m extension lead
- 5m power connection to 24VDC battery box
- Internal 433MHz wireless transmission to slave display with 250m range
- CA connection to battery box
- Optional RS485 retransmission (not supplied)
Wireless Remote Shackle Tensile Link DisplayTW-2.0 display / 2.4GHz wireless transmission
Receiver Slave Display- Housed in rugged wall mountable Polyglass enclosure with viewing window
- Sealed to IP66
- Dimensions 308x255x130mm
- Red Lion bright red LED panel meter display
- Wall mounting brackets
- External ‘On/Off’ and switch
- Requires 110VAC - 240VAC supply
- 5m mains cable via IP67 cable gland
- RS232 / RS485 retransmission ports with 5m retransmission cable for connection to PC
- Removable Antenna with 5m extension lead
- Internal 433MHz wireless receiver with 250m range
Battery box- Housed in rugged peli 1400 case sealed to IP66
- CA connector bulkhead for connection to Master Display box
- Internal 24VDC rechargeable battery
- External bright DC volt indicator to show battery charge status
DocumentationManual including required setup software / wiring diagrams / calibration certificate / declaration of conformity
Optional extrasData logger / remote load monitoring and trend viewer via web browser / slave audible alarm / visual alarms / audible alarm
Email DLMContact Us