1PC 4 Digital LED Tachometer RPM Speedometer + Hall Proximity Sensor Npn Speedometer Hall Proximity Sensor Product Features: 100% brand new and high quality. 4-digit display, clear and easy to read. Speedometer Hall Proximity Sensor Small size, high performance and fast response speed. Speedometer Hall Proximity Sensor with good stability, high accuracy, anti-interference ability. Using the latest A/D conversion chip, high stability reference IC and stick chip components. Speedometer Hall Proximity Sensor can be applied to voltage and current measurement, can also be an external sensor to measure temperature, pressure, displacement and other physical quantities. Setting parameters will be memorized when the power is turned off. Speedometer Hall Proximity Sensor suitable for detecting the speed of all types of motors. Over-range display: thousand unit displays 1 or -1, the last three are not displayed. Speedometer Hall Proximity Sensor Product Specification: Display Type: LED Display Voltage: DC8-24V Current: 30mA Measuring Range: 10-9999rpm Accuracy: 0.1% Zeroing Time: About 10s Display Refresh Rate: 3 Times/sec Size: About 80*25*40mm(L*W*H) Installation Size: About 76*39mm LED Color: Red/Blue Detected Objects: Magnet. Detection Range: 1mm-10mm. Proximity Output Current: 20mA(For the Sensor). Operating Temperature: -10 to 60C. Sensor Size: 60 x 10mm Sensor Wire Length: 1.2M Magnet: 10x2mm Speedometer Hall Proximity Sensor Package Includes: 1 x LED Tachometer 1 x NPN Hall Proximity Sensor