The Barcol Impressor Hardness Tester is an easy to use hardness tester, ideal for measuring hardness of soft metals, plastics, glass fibre and leather.
 
Making sure the indenter point is perpendicular to the surface being tested, the instrument is placed onto the sample and a light pressure is exerted against the instrument driving the spring-loaded indenter point into the material and the hardness reading is instantly indicated on the dial. No waiting, pre-loading or separate measurements are required.

There are three models in the range:
Elcometer 3101/1 Model 934-1: for soft metals such as aluminium and its alloys, brass, copper, and some of the harder plastics and glass fibre. Approximate range 25 to 150 Brinell (10 mm ball, 500 kg load). This unit meets ASTM Standard D2583.
Elcometer 3101/2 Model 935: for softer plastics and very soft metals.
Elcometer 3101/3 Model 936: for extremely soft materials such as lead, linoleum and leather.
 
STANDARDS:
AS 3894.4, ASTM B 648, ASTM D 2583, NF P38-501

Standards in grey have been superseded but are still recognised in some industries.
 
a  Supplied with Standard Test Disc 934-1; 43 - 48 BU, Standard Test Disc 934-1; 87 - 89 BU
b  Supplied with Standard Test Disc 935; 87 - 89 BU
c  Supplied with Standard Test Disc 936; 43 - 48 BU
To ensure the Barcol Hardness Tester is in calibration, a range of Standard Test Discs is available. Please select the appropriate Test Disc from the list of Accessories to supplement the disc supplied.

All results are recorded in Barcol Units (BU).