Reliable and competitive:

The sensors used for water and / or wastewater applications face a series of limitations in the measurement of the level:

  • Pressure sensors (especially those made of stainless steel) strongly show the deposition of material on the sensor (clog) resulting in error and / or inability to measure.                                          They are also vulnerable to the corrosive environment in which they are called upon to function.
  • Ultrasound measurement sensors have measurement reliability problems (due to “foam” – Pseudo echo- turbulence and waves).



The CNPA sensor of SOFREL, due to its design, has the following advantages:

  • Reliability in measurement due to ceramic membrane which, in addition to precision, is easy to clean without allowing material to be deposited on the clog.
  • Ease of installation close to the bottom (usually inside a pipe to avoid turbulence due to pump operation for example).
  • It does not require external power supply, so it ensures continuity of measurement even in the absence of voltage in the power supply.
  • The CNPA sensor with competitive market price and low operating and maintenance costs, helps keep the cost of the installation low.



Additional advantages:

By using the Sofrel S500 series or other remote terminal units and / or PLC’s, the CNPA Level Sensor significantly enhances telemetry and SCADA imaging:

  • By continually measuring the level in a tank, both input and output can be calculated more accurately
  • Ability to create and manage point-of-action start / stop points in relation to mechanical devices.



The SOFREL CNPA level sensor is a step forward in improving control and telemetry processes in wastewater and sewage plants, remaining technically in progress, competitive financially and reliable in its operation.