Tachometer Contact and Noncontact Contact RPM Range 6 to 25 000 Noncontact RPM Range 6 to 99 999 RPM Accuracy +/-0.4 Percent Working Distance 2 ft Light Source Incandescent Display 5 Digit LCD Memory Last/Min/Max Features Diode Detection Measures Total Revolutions Revolutions Per Minute Surface Speed Length Makes Both Contact and Non-Contact Measurements Calibration Certificate NIST