Sealey TA050 Digital Tachometer Contact/Non-Contact Features: Professional quality laser instrument for fast and accurate measurement of rotational speed with or without contact.Will also measure total revolutions, frequency, surface speed and distance.10 Selectable data set memories each with maximum, minimum and average or single value reading, as appropriate.Supplied with reflective tape, for non-contact measurement, and three heads for contact measurement.Powered by 9V battery (supplied) and has jack socket for 6V DC supply. Specification: Part Number: TA050Barcode: 5024209118316Brand: SealeyNett Weight: 0.26kgRotation Speed - Contact: 2-20,000rpmRotation Speed - Non-Contact: 2-99,999rpmTotal Revolutions: 1-99,999Sampling Time: 0.5s @ >120rpmAccuracy: ± (0.05% + 1 digit)Surface Speed: m/min, in/min, ft/min, yd/minDistance: m, in, ft, ydFrequency: HzBattery: PP3External Power: 6V DC Due to delivery restrictions we are only able to deliver this to UK Mainland addresses. Unfortunately if your delivery address includes the Scottish Highlands, Northern Ireland & The Isle of Wight then your order will get cancelled automatically. **images for illustrative purposes only – please refer to description and specification for full details of product**