An optical/contact tachometer for measuring speeds of rotating objects in revolutions per minute. It also measures surface speeds in metres per minute or feet per minute. High accuracy is achieved by combining CPU, photoelectrical and laser techniques. The ergonomic design makes the instrument comfortable to use. Measurements: Optical: RPM non-contact via supplied reflective tape Contact: RPM via cone or funnel Contact: m/min via surface wheel Impact-resistant ABS case Laser spot for easy identification of target (optical mode) Optical detecting distance 50mm-500mm 28mm LCD display with function indicators Recall of last measured value Min/max memory updated automatically Interchangeable cone, funnel and surface wheel for contact measurements Sampling time of 0.8secs (over 60 RPM) Low battery indicator Supplied with foam padded carry case, 700mm reflective tape, batteries and DT-KIT3 accessories kit