Digital Tachometer 4 LED RPM Speed Meter+Hall Proximity Switch Sensor NPN (Color : Red)

Digital tachometers are stable, accurate and resistant to interference. 4-digit LEDs are bright and easy to read. At a glance, the data will facilitate your work. The tachometer uses the latest A/D converter chip and high stability reference IC. compact design, high reliability, fast response time, long service life, easy to install. The counter input pulse signal is NPN/PNP open collector, contact switch, non-contact switch, level pulse. Input signal voltage low level: -30 V -0.6 V, high level: 4-30 V. Switch sensor measurement range frequency: 9999H, 999.9 H, 99.99 kH, can be automatically switched, timeout use. Widely used in automation equipment and test equipment. Tachometers are used in a wide range of applications including voltage, current and external sensor measurements for temperature, pressure, displacement and other physical quantities.