Features 1、Equipped with 3 bars of silver reflection tag (200mm*12mm). 2、Non-contact measurement. Accurate measurement, fast response. 3、Tachometer is 1 of the necessary instruments in the mechanical industry to determine the speed, linear speed or frequency of the motor. The rotating speed of impeller, roller and shaft can be accurately measured. 4、Widely used in motor, fan, washing machine textile, automobile, airplane, ship and other industries. 5、Hard ABS plastic, the shape is beautiful and generous. Easy to use, the large LCD display and reading are clear. Specification Tachometer is one of the necessary instruments for machinery industry, which is used to detect rotate speed, linear velocity or frequency of motor. It can precisely measure rotate speed of impeller blade, expansion cylinder and spindle and can be widely used imotor, fan, washing machine, textile, automobile, airplane, ship and other industries. Features: Equipped with 3 bars of silver reflection tag (200mm*12mm). Non-contact measurement. Accurate measurement, fast response. Tachometer is 1 of the necessary instruments in the mechanical industry to determine the speed, linear speed or frequency of the motor. The rotating speed of impeller, roller and shaft can be accurately measured. Widely used in motor, fan, washing machine textile, automobile, airplane, ship and other industries. Hard ABS plastic, the shape is beautiful and generous. Easy to use, the large LCD display and reading are clear. Specifications: Item Name: Tachometer Material: ABS LCD Display: 5-digit large screen LCD display, with word height of 18mm Unit: RPM Measuring Range: 2.5 to 99999RPM Resolution Ratio: 0.1RPM (2.5 to 999.9RPM) 1RPM (1,000 to 99999RPM) Basic Precision: ±(0.1%n+5d)rpm:(2.5 to 999.9rpm) ±(1%n+5d)rpm:(1000 to 99999rpm) Laser Power: CLASS IIIA 2-5mW Sampling Ratio: Once/second Measurement Distance: 50-500mm Time Base: Quartz crystal Automatic Shutdown: The instrument will shut down after 60 seconds without any pressing Operation Environment: 0-50℃(32-122℉), 10%~90%RH Storage Environment: -10-80℃(-14-176℉), 10%~75%RH Power Supply: 3 * 1.5V AAA battery (Not included) Item Size: 119 * 49 * 30mm / 4.68 * 1.93 * 1.18in Item Weight: 110g / 3.88oz Package Weight: 142g / 5.01oz Package Size: 13 * 6.5 * 4.5cm / 5.12 * 2.56 * 1.77in Package List: 1 * Tachometer 3 * Reflection Tag 1 * User Manual (English) Package List 1 * Tachometer 3 * Reflection Tag 1 * User Manual (English)