Wireless transmission of force measaurement in hazardous areas

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At SENSY, our daily challenge is to adapt the interface of our force transducers to meet the operating constraints in the field.

We manufacture force transducers based on strain gauges technology, with a standard output between 5 and 30 mV (power supply: 10 VDC).

As long as SENSY has been in existence, it has offered a wide range of options to allow the type of transmission to be adapted to the application, including:

We can now add to this list:

A ‘wireless ATEX-certified transmitter/receiver capable of being both battery-operated and used in hazardous areas’ 

  • SENSY recently delivered a complete measurement solution, which included a system for measuring the force of five mooring cables operating in a hazardous area, by utilizing radio transmission.
  • FINDING a solution for a customer’s problem: Our customer needed to control the forces applied on the tankers mooring lines during the discharge of their crude-oil cargo.


  • Manufacture of five ‘Exd’ certified tensiometers, submersible in case of an
    accident, quick release for ease-of-use, and connected to a multichannel radio;
  • Development of an ‘Ex- certified’ transmitter in an explosion-proof enclosure;
  • Realization of an Ex- certified receiver mounted on the outside of the ship’s bridge in an explosion-proof enclosure and connected to a computer installed in the safe area.
  • Features of dedicated software:
  1. Display of the tension force of each mooring line in a bar graph so that the data can readily understood.  
  2. Programmable alert thresholds with an audible alarm and a color changing from green to red depending on the force level.
  3. Real-time data recording.



Force transducers

  • Type                                         : Static line tensiometer, model 5560S
  • Capacity                                   : 45 t
  • Certification                              : ‘Exd T6’ according to CEI 60079-1/EN60079-1
  • Output signal                            : 1 mV/V
  • Protection                                 : IP67 Marine
  • Cable length                             : 15 m
  • Option                                       : Quick release system

Conditioner / Transmitter

  • Number of channels                  : 5
  • Accuracy                                   : ± 0.1 %
  • Inputs                                         : 5 x 2 mV/V
  • Power supply                             : 10..24 VDC
  • Range                                        : 1.000 m with no obstructions or interference in the
                                                         surrounding area
  • Explosion-proof enclosure         : Eexd IIB T4


  • Output                                        : RS485 (Modbus)
  • Power supply                             : 230 VAC
  • Explosion-proof enclosure         : Eexd IIB T4
  • Protection                                   : IP54

Dedicated software (on a computer outside of the hazardous area)

  • Display of the five strengths on a bar graph with colours changing from green
    to red depending on the force level;
  • Programmable alert thresholds with an audible alarm.
  • Data recording


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