The Setamatic Penetrometer is a microprocessor-controlled instrument with a range of 0 to 63 mm (630 Pen). Plunger release and retention is automatic and results are shown on the digital display in either millimetres or ‘pen’ units. Soak and penetration times may be set from 0 to 9999 seconds. An RS232C interface is provided for connection to a personal computer.