The new SilverSchmidt ST/PC is Proceq's most sophisticated rebound hammer that makes concrete testing quicker and more accurate than ever before.

The SilverSchmidt ST/PC is the first integrated concrete test hammer featuring true rebound value and unmatched repeatability.
Two factors contribute to the improved performance of this concrete test hammer over its predecessors:

  • Velocity based detection of the rebound quotient
  • The lightweight hybrid design of the impact plunger is made from aerospace alloy, matched to the elastic properties of the concrete and equipped with a hardness steel cap

Independent validation testing by BAM (Federal Institute for Materials Research and Testing, Germany) has shown the SilverSchmidt ST/PC to have less dispersion than the classical concrete test hammer over the entire range.
The unique design and high quality construction of the concrete test hammer SilverSchmidt ST/PC makes rebound hammer testing quicker and more accurate than ever before.

  • The SilverSchmidt ST/PC concrete test hammer combines a high measurement accuracy with an unmatched repeatability.
  • The rebound value requires no angular correction
  • The concrete test hammer offers customer conversion curves for a wide range of compressive concrete strengths, including low fc (<10 N/mm2, 1,450 psi) and high strength concrete (up to 100 N/mm2, 14,500 psi)
  • A large number of measurement points can be easily collected by the concrete test hammer and automatically evaluated according to statistical data
  • The concrete test hammer offers automatic conversion to the required measurement unit (MPa, N/mm2, kg/cm2, psi)
  • Ideally suited for on-site tests of concrete
  • The concrete test hammer is suitable for testing a wide variety of concrete, mortar and rock
  • Handy for difficult to access or confined test areas (i.e. working overhead)
  • Assessment on young, soft concrete with mushroom plunger of the concrete test hammer

Mechanical data

Type ST N / PC N 
concrete test hammer

Type ST L / PC L 
concrete test hammer

Impact energy

2.207 Nm

0.735 Nm

Hammer mass

135 g

135 g

Spring constant

0.79 N/mm

0.26 N/mm

Spring extension

75 mm (2.95")

75 mm (2.95")

Housing dimensions

55 x 55 x 255 mm (2.16" x 2.16" x 9.84")


570 g (1.3 lb)


PC application

Only for the concrete test hammer SilverSchmidt versions PC N and PC L: Hammerlink Software


Electrical data                           


17 x 71 pixels; graphic / alphanumeric

Power consumption

~13 mA measuring, ~4 mA setup and review, ~0.02 mA idle

Battery life

>5000 impacts (before recharging)

Charger connection

USB type B (5V, 100 mA)


Measuring ranges

Concrete compressive strength

10-100 N/mm2 (1450-14500 psi)

Operating temperature

0 to 50 C (32 to 122 F)

Storage temperature

-10 to 70 C (14 to 158 F)