PROCTOR NEEDLES (HYDRAULIC TYPE):

AS PER ASTM D 1558

Introduction:

• This is identical to Spring Type, except that the penetration pressure on the needle is conveyed through a hydraulic system to a hydraulic pressure gauge.
•  This system permits a greater control over rate of penetration because of better visibility of load indication.

General Description and Specifications:

• Comprises hydraulic proctor needle system complete with a pressure gauge fixed at easily readable angle reading 0-70 kg x 2 kg.
• A set of needle points consisting one each 0.25, 0.5, 1.0, 1.5, 2.0, 3.5 and 6.0 sq. cm. and a Tommy pin. Graduation at every 12.5 mm to indicate depth of penetration is marked on longer stem for use with needles of larger areas.
• Smaller stem is also graduated at every 12.5 mm and is used with needles of smaller areas.
• Complete as above in a wooden carrying case.