Contact Tachometer For Contact rpm measurements Plus Linear surface speed measurements in ft/min or m/min Features: • Large 5 digit LCD display is easy to read • Built-in memory recalls last MAX/MIN value stored • Autoranging with 0.05% accuracy • Contact measurements from 0.5 to 19,999rpm plus linear surface speed measures in ft/min or m/min • Simply contact rotating object with sensor tip and read • Accessory wheels enable tachometer to measure linear surface speeds • Complete with cone tip, flat tip and spare wheel for surface speed measurements, four 1.5V AA batteries and case Accessory wheels enable tachometer to measure linear speed surfaces Specifications Range Accuracy Sampling Time Resolution Dimensions Weight 0.5 to 19,999rpm 0.2 to 6560ft/min 0.05 to 1999.9m/min ±(0.05%rdg +1d) 1sec>6rpm 0.1rpm (0.5 to 999.9rpm);1rpm >1000rpm 6.7 x 2.8 x 1.5" (170 x 27 x 37mm) 9.2oz (260g) Ordering Information: 461891 ................Contact Tachometer 461891-NIST ......461891 with Calibration Traceable to NIST 461990 ................Set of Spare Contact Wheels (2 sets of 3) www.extech.com Specifications subject to change without notice. Copyright © 2008-2013 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form. 11/27/13 - R1