Piezometers and Water Level Meters



The ultrasonic measuring system is often used for the measurement of flow rates, especially in dynamic channels; it is available in various measuring ranges, and can also be used in channels with small flow rates (up to a meter) always with acceptable accuracy.  Easy to install and easy functional verification, it is  particularly suitable for use in dams, both for level tributary channels and in tunnels for the measurement of flows associated with weirs.



The instrument is particularly suitable for the monitoring of levels in tunnels of concrete, RCC and in earthfill dams, for the monitoring of leakage and drainage. It is also used for measurement of levels in basins.
Especially recommended for:

  • lakes
  • wells
  • tanks
  • ports
  • docks
  • channels
  • streams
  • rivers


Features and benefits

The ultrasonic sensor also allows the measurement of levels in dynamic regimes. The instrument is characterized by:

  • Non-contact measurement
  • Simple installation
  • No wear and tear
  • Maintenance free
  • Pressure independent
  • Temperature independent
  • Not influenced by the liquid
  • Immune to electromagnetic disturbances
  • High precision measurement



The sensor is comprised of an antenna which emits ultrasonic pulses at short intervals; the pulses are generally directed perpendicular to the water surface whose level is being measured. The pulse reflects on the free surface of the liquid and bounces towards the instrument which picks up the return signal. The running period of the radar signals is proportional to the distance from the emitter and the free surface of the liquid. A special processing procedure ensures reliable and precise measurement.




Technical Specifications


Range 1 or 3 or 5 or 8 or 10 meters
Dead zone 10 o 20 cm (dependin of range)
Measuring Deviation ±0.2% of the range (from 1 to 10 meters of range)
±0.3% of the range
Connection Thread GAS 1” o 2”
Mounting Bracket
Temperature -20 … +60 °C
Storage temperature and transport -35+60 °C
Operating Voltage 24 Vdc
Output signal 4-20mA

Accessories and Spare Parts


Application Device and Ultrasonic Support For installation on vertical or horizontal Wall
Protection group from overvoltages Electrical Protection


Related Products


V-Notch For the adjustment of the liquid flow to be monitored
Enamelled Staff Gauge For manual and visual measurement of levels
Level Meter with stainless steel rod Special Staff Gauge for manual and visual measurement of levels

Technical Assistance

If you have any requests or questions about our instruments or if you have special needs that require different solutions from the standard, please contact us. Our team will provide all the necessary information and will be very happy to work with you to study, develop and customize instruments and solutions suitable for your specific needs.


All information in our datasheet is subject to change without prior notice.

Please check the datasheet/details carefully and contact Pizzi Instruments for further information