First Production Model
4.5 kg Analogue Display
Released 1977
by Univention
4.5 kg Analogue Display
Released 1977
by Univention
The University of
Western Australia established a company called Univention for manufacturing and marketing the device, named by Dr
Clegg the
“Impact Soil Tester” but which was called the “Clegg Impact Soil Tester” or the
“Clegg Hammer” by
those at the UWA & elsewhere.
Right photo: Dr Clegg demonstrating the
test method
