Provided with non-contact type of photo sensor for contact free measurements of RPM. Range of measurement 60 to 10,000 RPM with resolution of 1 RPM. Accuracy: ± 1 RPM. Power required: 6 Volts DC, 4 dry cell batteries of 1.5 volts of size AA. Low battery indication glows when batteries become low. Display automatically turns off and memory LED starts glowing if instruments remains unattended more than 32 seconds and helps conserve battery life.
Dimensions: 225 x 60 x 50 mm. Mass approx. 360 gms. (13 oz.)