This digital display counter has a bright LED light, high accuracy, good stability, and easy installation. The meter remains the number automatically when power off. It has The working power supply of  AC/DC 8-24V, 40mA. The product has good stability, strong anti-interference, and is ability suitable for display of various digital instruments.

Application: Lathe, CNC, Mower, Spring, etc. Measure varied motor RPM.

Connection Diagram:

Features:

1. 4 digit bright LED light, clear to read.
2. Good stability, high accuracy, and easy installation.
3. Counting value will be retained when power failure.
4. Wide application to automation equipment and test equipment, etc.
5. Compact size, beautiful appearance, and Blue, Green, Red, three color for you to choose.

Hall NPN sensor:

1. Appearance: M12mm cylinder
2. Output: NPN three wire normally open type
3. The detection distance: 10 mm
4. Supply voltage: 8-24VDC,6-36VDC
5. Output current: 200 mA
6. Objects can be detected: permanent magnets
7. Switching frequency: 320 KHZ
8. Wiring:brown-Power+,blue-Power-,black-signal

Package Includes:

1 x 4 Digital red measurement indicators tachometer
1 x Hall NPN proximity sensor