Checkline Combination Contact and Non-Contact Digital Tachometer - CDT-2000HD - Light Tool Supply
NEIKO 20713A Digital Tachometer, Noncontact Laser Photo Sensor with 2.5 to 99,999 RPM Accuracy, RPM Gauge Marker with Batteries Included: Digital Tacometer For Measuring: Amazon.com: Industrial & Scientific
Control Company 4060 Traceable® Digital Laser Tachometer - CON4060 - General Laboratory Supply