Electro-pneumatically controlled multi-blow test instrument for connecting to a 3/4" stationary compressed air supply, consisting of the following items:

• shot jet unit with compressed air vessel, pressure reduction valve for working pressure and acceleration tube,
• adjustable vibratory feeder for feeding the impact particles,
• operator's control panel with main switch, feed time adjustment, switch for initiating the stone hammer blow test as well as a multifunctional display for read off the working pressure, the duration of the test, the setting of the vibratory feed and the number of tests conducted (total / temporary),
• specimen fixing device with adjustable angle of bombardment.

The scope of supply includes 1 kg shot (grit acc. to ASTM D 3170) and an Operating Instructions.