1PC 4 Digital LED Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPNSpeed Meter Hall Proximity Switch SensorProduct Features: .4-digits display, clear and easy for readings.Speed Meter Hall Proximity Switch Sensor Mini size, high performance and fast reaction speed.Speed Meter Hall Proximity Switch Sensor with good stability, high accuracy, anti-interference ability.Using the latest A/D conversion chip, high stability reference IC and stick chip components.Speed Meter Hall Proximity Switch Sensor can be applied to voltage and current measurement, also can be an external sensor to measure temperature, pressure, displacement and other physical quantities.Setting parameters will be memorized when power off.Speed Meter Hall Proximity Switch Sensor suitable for detecting the speed of every kind of motors.Over-range display: the thousand unit display "1" or "-1", the last three do not show.Speed Meter Hall Proximity Switch SensorProduct Specification:Display type : LED displayVoltage : DC8-24VCurrent : 30mAMeasurement range : 10-9999rpmAccuracy : 0.1%Clear zero time : About 10sDisplay refresh rate : >3 times/secSize : about 80*25*40mm(L*W*H)Installation size : about 76*39mmLED color : red/blueDetected objects : Magnet.Detection range : 1mm-10mm.Proximity output current : 20mA(For the sensor).Operating temperature : -10 to 60C.Sensor size : 60 x 10mmSensor wire length : 1.2MMagnet : 10x2mmSpeed Meter Hall Proximity Switch SensorPackage Includes:1 x LED Tachometer1 x NPN hall proximity sensor Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia