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As per IS 1448
This apparatus is used for penetration test on a wide variety of materials such as Bitumen, Tar, pharmaceutical creams, petroleum, wax, polish, food stuff, rubber and asphalts.
It consists of a head support mounted on a vertical rod which can be adjusted for height. A rack and pinion and pointer assembly provides fine adjustment of needle tip to sample and in corporates a slipping clutch mechanism which make reading of penetration and subsequent resetting a sample and accurate operation. The dial graduate from 0-400 in one tenth millimeter sub-division. The instrument is supplied with two sample containers & 2 weights.
Technical Details:
Weight for Grees Testing: 50 gm
Weight for Bitumen Testing: 100 gm
Needle Weight : 2.5 gm
Cone weight: 102.5
Plunger weight: 47.5 gm
These are the different Models:
SI-RAP 137 Penetrometer with container and weights having Penetration Needle
SI-RAP 139 A Penetrometer with brass cone needle with Digital Timer Device
SI-RAP 139 B Same as Model No. 139 A but with geared arrangement for moving the arm with geared unit
Optional Accessories
SI-RAP 137 A Spare Penetration Needle (Pack of Two)
SI-RAP 137 B Spare Penetration Solid Cone
SI-RAP 137 C Spare Penetration Brass Hollow Cone