Piezoresistive level probe PIEZO FOR

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Presentation
The PIEZO FOR piezometric probe, with a reduced diameter of 16 mm, is designed for small-diameter boreholes and confined spaces to provide continuous water level measurement. It detects sudden level variations and enables preventive alerting. The probe uses a piezoresistive sensing cell to measure hydrostatic pressure (proportional to water depth) and converts it to a conditioned 4-20 mA current loop signal.

Operating principle
The probe is immersed in water (borehole, well or tank); the piezoresistive sensor measures the pressure exerted by the water column above the probe and converts this pressure into an electrical signal proportional to water height. The output can be connected to a recorder or processing unit.

Signal and power
Measurement output: 4-20 mA current loop (4 mA = 0 m, 20 mA = full scale). Supply voltage: 6 to 38 V DC.

Recommended accessories

• FIX-CAB (cable attachment / fixing accessory for suspended probe)
• Junction box (for cable extension)
• Surge protector (overvoltage protection)

Summary table (excerpts of technical characteristics)
Measured water column height: full scale configurable from 10 mH2O to 100 mH2O (full scale set at factory to requested value).
Measurement signal: 4/20 mA current loop (4 mA = 0 m, 20 mA = full scale).
Electrical characteristics: DC supply 6 to 38 V.
Consumption: current loop signal in mA.
Measuring cell: AISI 316L stainless steel.
Hysteresis: 0.05%.
Maximum temperature: 0 °C to 40 °C.
Housing body: AISI 316L stainless steel.
Cable: 2-core 0.22 mm², standard 10 m PU cable supplied (extension possible).
Probe weight: 370 g.
Dimensions (indicated): Height: 130 mm — Diameter: 25 mm.

Technical specifications

• Model: PIEZO FOR
• Diameter stated in presentation: 16 mm (thin probe for small-diameter boreholes)
• Measurement height (full scale): 10 mH2O to 100 mH2O (factory set on request)
• Output signal: 4-20 mA (current loop)
• Supply: 6 to 38 V DC
• Measuring cell: AISI 316L stainless steel
• Body: AISI 316L stainless steel
• Operating temperature: 0 °C to 40 °C
• Cable: 2 conductors 0.22 mm², supplied with 10 m PU cable (extension possible)
• Hysteresis: 0.05%
• Weight: 370 g
• Dimensions: height 130 mm — diameter indicated in table 25 mm