Pore pressure gauges

Geonor's electrical pore pressure meters are based on the oscillating string principle. More than 50 years of experience has shown that the meters are stable and have a long service life. They can be supplied either for pressing into soft ground or for immersion/burial. Both types can be supplied with armored cable (FERE), or with our standard ventilated cable. If armored cable is used, the sensor is given an "A" after the version designation, so the M-605 is the standard model for standard cable and the M-600A is intended for FERE cable.


The pore pressure sensor for armored cable can also be equipped with a temperature sensor. The pore pressure gau ge has the same diameter as the extension pipes, eliminating the risk of leakage along the drill string.

M-605 push-in series

• New type, simplified, more robust
• For pressing down, can be used directly without pre-drilling
• Made for 1" water pipes
• Quick to install in soft ground
• Short response time
• Accuracy better than 0.5% of full scale
• Measuring range 2 to 6 bar

M-603 open push in - Available on request

The M-603 is a special version of the M-600, which is open to atmosphere and equipped with a rubber membrane over the pressure membrane. Using compressed air, a back pressure is applied to relieve the pressure membrane. This will balance against the pressure during depressurization and thus the pore pressure gauge can be depressed faster. The back pressure can also be used to relieve the membrane for reading the zero point frequency. Only available for standard cable and for maximum 6 bar.

• Can be used directly without pre-drilling
• Quick to install in soft ground
• Short response time
• For 0-point control
• Accuracy better than 0.5% of full scale
• Measuring range 2 to maximum 4 bar

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M-610A embedment series

• Designed for direct installation
• Well suited for use in ponds, landfills, environmental wells, etc.
• Stainless steel housing, other materials such as titanium can be supplied on request
• Measuring range 2 to 30 bar
• Supplied with armored cable (FERE)

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Geonor supplies cables specially developed for geotechnical purposes. The cables are available in two versions, standard and reinforced (FERE). Cable glands and splice kits can be supplied for both types of cable.

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Reinforced special cable 2 pairs FERE

P-430 is a steel reinforced 2-pair cable. It is specially designed to withstand high tensile and pressure loads and is protected against water ingress should the sheath be damaged.

Geonor standard cable

Standard 1-pair cable with screen, intended for use where the cable is not exposed to high mechanical stresses.

Ventilated cable for M-603 is available on request.

M-207 Hydraulic piezometer

M-207 Hydraulic piezometer is further developed from M-206. The piezometer can be pressed down without pre-drilling, normally to a depth of approx. 30 m. Designed for Ø32 mm extension pipe. Transitions to 1" water pipes can be supplied.

• Easy to install
• Simple and robust design
• Designed for measuring groundwater level and pore pressure
• Pressing down without pre-drilling
• Supplied with bronze filter
• Read using a specially adapted water level meter

Geokon/Encardio Rite/Slope Indicator

Geonor is the distributor for Geokon, Encardio Rite and Slope Indicator in Norway. These are world-leading manufacturers of geotechnical instrumentation, covering all products and applications within geotechnical instrumentation.

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