This is a 2-in-1 digital tachometer that combines a photo (optical) tachometer and a contact tachometer in one instrument. Photo mode reads 5 to 100,000 RPM, contact mode reads 0.5 to 19,999 RPM, and it can also measure surface speed. It comes with accessories, reflective tape and a carrying case. Key Features Photo (non-contact) mode: 5 to 100,000 RPM Contact mode: 0.5 to 19,999 RPM Measures surface speed Two tachometers in one instrument Supplied with accessories, reflective tape and carrying case Specifications Type Photo and contact tachometer, 2-in-1 Photo range 5 to 100,000 RPM Contact range 0.5 to 19,999 RPM Other functions Surface speed Shipping weight 4.6 lb SKU 01DT2236 What's Included 2-in-1 tachometer Accessories Reflective tape Carrying case Ideal ForMaintenance technicians checking motor, fan, belt and conveyor speeds with or without touching the shaft. Frequently Asked QuestionsWhat is the reflective tape for?In photo mode you stick a small piece of tape on the rotating part; the tachometer counts each time the light reflects back to calculate RPM.When should I use contact mode?Use it when you can safely touch the shaft or a moving surface, for example to measure belt or roller surface speed.