Mengshen Digital Tachometer, 2 in 1 Non-Contact & Contact Tach Rotation Speed Measurement RPM Meter M522

Thanks for coming, you deserve the best! This is Mengshen's Handheld Professional Digital Tachometer M522. Specifications: Contact Measurement Range: 2~ 20,000 RPM Non-contact Measurement Range: 2~ 99,999 RPM Resolution Ratio: 0.1 or 1 Accuracy: +/-(0.02%) + 2 digit REV Measuring Range: 1-99999 Sampling Time: 0.5sec Measurement Distance: 50mm ~ 600mm Display: 5-digit Backlight LCD Display Working Temperature: 0°C-50°C(32°F-122°F) Power Consumption: 45mA Power Supply:9V DC Battery(Included) Please Attention Before using, you can practice or test it on conduction motors. Usually keep device close to the object measured to reduce the size of the laser dot can get a more accurate readings. The purpose of the reflective tape is to offer a good contrast between background and measuring area, but if the part measured has other reflective surfaces, like shiny metal, please apply a non-reflective tape(black or a dark color tape) to act as background. If reflective tape ran out, white paint is an easy substitute for it. 2 in 1 Contact & Non-contact RPM Meter Large LCD Display Sensor LCD display Mode key Memory view key Backlight key Measuring key Battery compartment   Non-contact Measurement Open battery cover by screwdriver, install a 9v battery, Cut a square off from the reflective tape and paste it on the object to be measured, Press "MEAS" button to aim the reflective tape with laser.   Contact Measurement Install the adapter on the instrument, aim on and contact the axis of the object measured, then the data will display on the LCD screen. Measuring type: Rotational speed(RPM), counter rotating(REV), frequency(Hz), surface speed Widely Application It is widely used to measure the RPM of the Engine, Motor, Drill Press, Lathe, Car, Fan And Wash Machine. It can also measure the surface velocity of the conveyor. Power Supply: 9V battery(Included) Package Content: 1 * Tachometer, 1 * Protection Cover, 4 * Connecting Head , 1 * Reflective tape, 1 * User's Manual Digital Temperature & Humidity Meter Digital Psychrometer Decibel Meter Infrared Temperature Gun Wind Speed Meter Air Pressure Meter Part Number MS-M86 MS-M350 MS-M80A MS-M816 MS-M9819 MS-M1890 Measuring Range -4°F to 176°F(-20°C to 80 °C) -22°F to 199°F(-30°C to 100°C) 30 to 130dB -58°F to 1202°F(-50°C to 650°C) 0.4 to 30.00m/s ±13.79kPa