Sensors and accessories

  • Sensors
  • Protections
  • S500 Window

Both sturdy and accurate, the SOFREL range of sensors offers the best performance for installations equipped with SOFREL RTUs


Level and pressure sensors for drinking water networks

CNPI: submerged piezoresistive pressure sensor with a high-quality stainless steel membrane


This ACS-certified sensor measures the water level in reservoirs, tanks, drill holes... It determines the water level by measuring the difference in pressure between the surface of the liquid and the bottom of the reservoir in which it is submerged.




CNPR: piezoresistive pressure sensor for a 1/4" DIN 3852 gas coupling with a high-quality stainless steel membrane


It measures the pressure on hydraulic or pneumatic pipes. It connects to a standard thread and delivers a signal proportional to the pressure in the pipe.




Level and pressure sensors for waste water treatment networks

CNPA: submersible pressure sensor with capacitive ceramic membrane


This sensor measures the pressure in lift stations despite the effluents found in sometimes very aggressive waste water networks.




CSV: Sensor for the detection of overflows


It detects overflows in sewer overflows either downstream of the overflow, on the bottom of the pipe, or upstream of the overflow, at the weir. Its reliable detection delivers accurate readings when it is covered by effluents.





Download the Sensors documentation



SOFRELLACROIX protective equipment Sofrel offers you a complete range of equipment for protection against voltage surcharges, perfectly suited to its telemetry and SCADA equipment and to their difficult environment.

These products have been specifically designed to provide optimal protection for SOFREL devices under particularly harsh conditions of use.






A complete range


  • Low voltage 100-240 V AC single phase type 2 surge protector
  • PSTN telephone line surge protector
  • RS485/DL link surge protector
  • 4-20 mA or 13.8 V remote board surge protector


S550 and S530 Remote Terminal Units can be installed on the front panel of an enclosure, thus facilitating access to the interactive graphic screen or local connection with Softools. To enable optimal installation in industrial premises (dust and moisture), LACROIX Sofrel has developed a specific protective window.

The S500 window provides a further advantage by simplifying the cutting and set-up of the Remote Terminal Unit on the enclosure door by means of a cutting template supplied along with all accessories required for assembly.

The system of joints and the lockable hood guarantee IP64 watertightness.

In order to be perfectly suited to each product, the S500 window is also available in S530 and S550 versions.