A semi-automatic penetrometer with a range of 0 to 640 Pen (64 mm). Plunger release and retention is controlled by a solid state timer which can be set for penetration times of 5, 8, 10, 12, 30 and 60 seconds.

• Penetration range 0 to 640 Pen (64 mm)
• 5, 8, 10, 12, 30 and 60 second timer settings
• Automatic plunger release and retention
• Semi-automatic operation
• Provision for automatic sample contact detection