<p>1PC 4 Digital LED Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPN </p> <p>Speed Meter Hall Proximity Switch Sensor </p> <p>Product Features: </p> <p>100% brand new and high quality. </p> <p>4-digits display, clear and easy for readings. </p> <p>Speed Meter Hall Proximity Switch Sensor Mini size, high performance and fast reaction speed. </p> <p>Speed Meter Hall Proximity Switch Sensor with good stability, high accuracy, anti-interference ability. </p> <p>Using the latest A\/D conversion chip, high stability reference IC and stick chip components. </p> <p>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. </p> <p>Setting parameters will be memorized when power off. </p> <p>Speed Meter Hall Proximity Switch Sensor suitable for detecting the speed of every kind of motors. </p> <p>Over-range display: the thousand unit display 1 or -1, the last three do not show. </p> <p>Speed Meter Hall Proximity Switch Sensor </p> <p>Product Specification: </p> <p>Display type : LED display </p> <p>Voltage : DC8-24V </p> <p>Current : 30mA </p> <p>Measurement range : 10-9999rpm </p> <p>Accuracy : 0.1% </p> <p>Clear zero time : About 10s </p> <p>Display refresh rate : 3 times\/sec </p> <p>Size : about 80*25*40mm(L*W*H)Installation size : about 76*39mm </p> <p>LED color : red\/blue </p> <p>Detected objects : Magnet. </p> <p>Detection range : 1mm-10mm. </p> <p>Proximity output current : 20mA(For the sensor). </p> <p>Operating temperature : -10 to 60C. </p> <p>Sensor size : 60 x 10mm </p> <p>Sensor wire length : 1.2M </p> <p>Magnet : 10x2mm </p> <p>Speed Meter Hall Proximity Switch Sensor </p> <p>Package Includes: </p> <p>1 x LED Tachometer </p> <p>1 x NPN hall proximity sensor</p>