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The Extech 461893 is a hand held non-contact tachometer which uses reflective tape to sense object speed.
Range (rpm) 5 to 99,999
Accuracy ±(0.05%rdg +1d)
Sampling Time 1sec > 60rpm
Resolution 0.1rpm (0.5 to 999.9rpm);1rpm (>1000rpm)
Dimensions 6.7 x 2.8 x 1.5" (170 x 27 x 37mm)
Weight 8.8oz (250g)
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