These digital tachometers feature high accuracy for precision measurements. The removable rubber boot provides an ergonomic, comfortable grip while protecting the meter in heavy-duty environments. Tachometers are available in optical (noncontact) or optical/contact models. Memory stores min/max, average, and last readings during measurement. A red LED helps target equipment from up to 24 inch (61.0 cm) away. CDT-1000HD-N 87601-03 features optical/contact measurements in RPM, three surface speed ranges, and three Length measurement ranges. Rubber boot protects meter during industrial applications provides 0.02 percent accuracy with 0.01-Rpm resolution.