Feature

●【Stable performance】: The speedometer adopts the latest A/D conversion chip and high-stability reference integrated circuit. Good stability, high precision and strong anti-interference ability.
●【Wide application】: Appearance adopts standard size, easy to install, suitable for all kinds of digital instrument display. For voltage, current and external sensor measurements to measure temperature, pressure, displacement and other physical quantities.
●【Parameter】: Input pulse signal: NPN/PNP open collector, contact switch, non-contact switch, level pulse. Input signal voltage: low level: -30V -0.6V, high level: 4-30V.
●【4-digit display】: The LED display has two choices of red and blue, four-digit precision display, display update rate, real-time update at a speed of more than 3 times per second.
●【Range】: Measurement range: Frequency: 9999Hz, 999.9HZ, 99.99KHZ, automatic switching selection. Automatic range selection saves the user time and effort and gets the job done efficiently.


Description

Specifications:

Measurement accuracy: ±0.1%

Display mode: 0.56""LED

Display refresh rate: >3 times/sec

Working power supply: DC8-24V, 30mA, measurement range: 10-9999RPM

Hall proximity switch : magnetic

Appearance size: 80 x 42 x 25mm/3.14 x 1.65 x 0.98inch

LED display(Optional): red, blue

Weight: 80g(red),105g(blue)

Overrange display: the first one shows ""1"" or ""-1"", and the latter three do not show

Precautions:

1. Connect the plug correctly according to the wiring diagram

2. Should avoid strong electromagnetic interference and it is better to use shielded wire or double stranded wire for measuring conductors

3. The counting signal of the counter and the switch of the zero clearing signal input or the circuit shall be as close as possible to the terminal of the counter to make the signal line as short as possible

4. Avoid with other such as: high voltage wires or power wires and so on with same tube or twisted trace line, in order to avoid unnecessary interference.If necessary, please use the shielded wire, shielding layer connect the""+"" of the count terminals

5. It is not recommended to use a mechanical switch or micro switch because they have a relatively short life span and can be counted by mistake after long time. If you use a mechanical switch or a micro switch, please try to use a better quality, so as not to miscount, and strongly suggest a magnetic control switch

Package Included:

1 x Tachometer

1 x Hall NPN proximity sensor