GEROtherm® DUPLEXThe standard geothermal probe


Double-U probe for shallow geothermal use. Resists internal pressure up to PN16@ 20°C and PN20@ 20°C.


The probe foot (U-bend) is the most important component in the GEROtherm® geothermal probe. It is subjected to the greatest stresses during installation and operation. That is why HakaGerodur has modified and patented its tried-and-tested GEROtherm® probe foot (32 mm and 40 mm).

Product details


  • Polyethylene PE100-RC (RC = resistance to crack)


  • Temperature range: –20°C/­+40°C

  • Pressure resistance: PN16@ 20°C/­SDR 11
  • Dimensions: de 32 mm, de 40 mm, de 50 mm

  • Pressure resistance: PN20@ 20°C/­SDR 9
  • Dimensions: de 40 mm, de 50 mm‎

For further product details, please refer to the corresponding technical datasheets.


Please refer to the corresponding Tender specifications for a more detailed product description.

Price list

(For the price list in € please contact our sales team.)


Dimension Pressure resistance
Standard lengths
Ø probe foot Coil dimensions
32 x 3.0 mmPN16@20°C /­ SDR11 50 - 160 meter 92 mm Probes
40 x 3.7 mmPN16@20°C /­ SDR11 50 - 300 meter 113 mm Probes
40 x 4.5 mmPN20@20°C /­ SDR9 200 - 300 meter 113 mm Probes
50 x 4.6 mmPN16@20°C /­ SDR11 50 - 300 meter 136 mm Probes
50 x 5.6 mmPN20@20°C /­ SDR9200 - 500 meter143 mmProbes
Factory certificate as per EN 10204 2.2


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