• Repeatability accuracy: +/- 4L units (L=Leeb) • For steel & cast steel, alloy tool steel, stainless steel, grey cast iron, spheroidal iron, cast aluminum, brass, bronze, wrought copper alloy • Tool steel should be about 1" thick solid material or larger Compact Hardness Tester The Starrett 3811A is a state of the art, digital portable hardness tester, designed to test the hardness of large, hard metal parts. The 3811A combines fast test speeds with ample memory and output. It performs tests that easily convert to most popular hardness scales such as Rockwell, Brinell, Vickers and Shore. This compact hardness tester is loaded with useful functions usually found only on high priced models. • Leeb style tester designed for large, hard parts - load the impact body and place the impact device on your test piece • Easy to use keypad operation - push the button to begin testing and obtain reading • Auto identification of impact device • Large LCD display with back light • Automatic conversions to Rockwell, Brinell, Vickers and Shore • Automatic mean value as well as Min & Max values • Uses two AA alkaline batteries with low power indicator • Memory capacity (100 groups) • Optional impact devices and special support rings Includes base Instrument, Impact device D, calibrated test block, custom carry case, cleaning brush and operation manual Bulletin No. 395 5M/T 08/11 Specifications subject to change. starrett.com 978-249-3551