Our line tension monitors provide a versatile solution for customers looking to ensure that mooring and winch loads remain within safe working limits.

We design and manufacture two types of line tension monitors; the Running Line Monitor (RLM) and the Static Line Monitor (SLM). These rugged, compact and accurate units are perfect for applications where a fixed means of measuring is impractical.

Featuring high quality stainless steel fixtures and an aluminium frame with marine grade coating to prevent corrosion, our line tension monitors are built to last. Their rugged construction makes them ideal for operation in the most extreme environments, including marine, offshore and onshore applications.

Available to suit various rope sizes and capacities, the line tension monitor’s simple clamp design makes the units easy to retrofit and move for use in other applications. Measuring tension, pay-out and speed in real-time provides customers with maximum flexibility in line control, sensor calibration and data logging.

Static line monitors are compact and measure loads up to 50 tonne’s, whereas our running line monitors provide data logging and can measure load speed and distance up to 100 tonnes.

With extensive experience and knowledge in torque measurement, our rotary torque transducers offer a high level of accuracy and require less space to operate than traditional in-line transducers. 

Our solutions are typically bespoke and engineered to specific customer requirements. 

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    Benefits of line tension monitors:

    • Designed and manufactured in the UK for high quality assurance
    • Robust construction for use in hostile environments
    • Easy to install, operate and remove
    • Easy to transport, highly accurate and reliable
    • Long design life with corrosion protection
    • Bespoke solutions tailored to your specific needs
    • Supplied with full certificate of calibration
    • Ensures mooring and winch load safety

    Available options:

    • Cabled and wireless options
    • Safe and hazardous area options
    • Mains or battery powered indicators

    Running line monitors

    Running line monitors provide data logging and can measure load speed and distance up to 300 tonnes. 

    Easy to set up and use, our individual units are designed to suit wire rope sizes and load, and are available for both safe and hazardous areas. For optimal accuracy and repeatability a 5-roller system of operation is applied. Options for accommodating load speed and distance are available and data logging is offered on most variants.

    • Robust stainless steel protection cage for electronics
    • Corrosion resistant design

    Cabled running line monitor typical specifications:

    mA output
    Rated load As required
    Proof load 200% ofrated load (dependent on rope capacity)
    Ropediameter 10mm to125mm
    Nonlinearity < ± 1% offull scale
    Nonrepeatability < ± 0.01%of full scale
    Zero balance < ± 0.01%of full scale
    Environmentalprotection IP66
    Operatingtemperature -20oC to +60oC
    Storagetemperature -30oC to +80oC
    Outputsignal 4-20mA(load)
    Pulsed output, quadrature mode (distance / speed) 
    Electricalconnection 8 core (loadand distance / speed)
    Cableconnection Gland andconnector
    Cable length 5m asstandard
    Recommendedsupply voltage 24V
    Maximumsupply voltage 30V

    Wireless running line monitor typical specifications:

    Wirelessoutput
    Rated load As required
    Proof load 200% ofrated load (dependent on rope capacity)
    Ropediameter 10mm to125mm
    Nonlinearity < ± 1% offull scale
    Nonrepeatability < ± 0.01%of full scale
    Zero balance < ± 0.01%of full scale
    Environmentalprotection IP66
    Operatingtemperature -20oC to +60oC
    Storagetemperature -30oC to +80oC
    Outputsignal Wireless 
    Data logging On runningline monitor
    Battery type 3 x D
    Activebattery life Up to 350hours
    Standbybattery life Up to 1700hours
    Telemetryfrequency 2.4Ghz ISM
    System range Up to 350m
    Samplingrate 10Hz (500Hzmax)

    Running line monitor typical dimensions:


    Sheave size A mm B mm C mm D mm E mm F mm G mm
    (wireless) 
    Model 1 10-25 722 250 62 601 112 162 95
    Model 2 22-28 810 270 90 785 146 186 95
    Model 3 32-40 963 297 90 899 148 188 95
    Model 4 42-46 1028 331 95 936 153 193 95
    • Cabled or wireless
    • Aluminium or stainless steel
    • Hazardous area Zone 0, 1 and 2
    • Various display options
    • Mains or battery powered indicators
    • Three or five roller system
    • Customised system design service

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      Static line monitors

      Our static line tension monitors are highly accurate and compact. 

      Designed for wire ropes from 7/8″ to 2″ diameter, they are suitable for measuring loads of up to 50 tonnes. Simple to install and offering flexibility in use, the small size of the device allows it to be carried easily from application to application.

      • Compact design
      • Robust construction
      • Easy to transport

      Cabled static line monitor typical specifications:

      mA output
      Rated load As required
      Proof load 200% ofrated load (dependent on rope capacity)
      Ropediameter 22mm to 50mm
      Operatingtemperature -20oC to +60oC
      Storagetemperature -30oC to +80oC
      Environmentalprotection IP67
      Outputsignal 4-20mA
      Electricalconnection 2 or 3 wire
      Cableconnection Gland andconnector
      Cable length 5m asstandard
      Recommendedsupply voltage 24V
      Maximumsupply voltage 30V

      Wireless static line monitor typical specifications:

      Wirelessoutput
      Rated load As required
      Proof load 200% ofrated load (dependent on rope capacity)
      Ropediameter 22mm to 50mm
      Operatingtemperature -20oC to +60oC
      Storagetemperature -30oC to +80oC
      Environmentalprotection IP66
      Outputsignal Wireless
      Data logging In interface
      Battery type 3 x D
      Activebattery life Up to 500hours
      Standbybattery life Up to 1700hours
      Telemetryfrequency 2.4Ghz ISM
      System range Up to 350m
      Samplingrate 10Hz (500Hzmax)

      Static line monitor typical dimensions:

      Measurement
      A mm 12.5
      B mm 2.5
      C mm 147.5
      D mm 147.5
      E mm 320
      F mm 319
      G mm 191
      H mm 66 (max)
      I mm 66
      J mm 140
      K mm 9
      • Aluminium or stainless steel
      • Cabled or wireless
      • Hazardous area

      OUR PRODUCT RANGE INCLUDES:

      Load Cells

      Load Cells

      Hazardous Area Products

      Hazardous Area Products

      Specialist Testing Equipment

      Specialist Testing Equipment

      Line Tension Monitoring

      Line Tension Monitoring

      Measurement and Control

      Measurement and Control

      Instrumentation

      Instrumentation

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