Description
4 Digital LED Tachometer/Speedometer with Hall Proximity Switch Sensor NPN
Feature:
1: 4-digit display, clear and easy to read, mini size, high performance and fast response speed.
2: With good stability, high accuracy, and interference immunity.
3: Use of the latest A/D conversion chip, highly stable reference ICs and stick chip components.
4: It can be used for voltage and current measurement, and can also be an external sensor for temperature measurement.
Pressure, displacement and other physical quantities
5: Settings parameters are saved when the device is switched off.
6: Suitable for measuring the rotational speed of all types of motors.
7: Overrange indicator: The thousands indicator "1" or "-1", The last three are not displayed.
Special features:
Condition: 100% brand new
Material: Plastic
Display type: LED display
Voltage: DC8-24V
Current: 40mA
Measuring range: 10-9999 rpm
Accuracy: 0.1%
Clear zero time: Approximately 10 seconds
Display update rate: >3 times/second
LED color: Red/Blue/Green
Sensor cable length: 1m
Note:
1. Connect the plug correctly according to the wiring diagram.
2. The Hall effect switch is a normally open NPN type, and the detection distance of the Hall effect switch must be within 10 mm. The installation diameter of the Hall effect switch is 12 mm and the cable length is 1 m.
3. Strong electromagnetic interference should be avoided. It is better to use shielded cable or twisted pair for the measuring lead.
4. The counter's counting signal and the switch or circuit of the reset signal input should be located as close as possible to the counter's terminal, and the signal line should be as short as possible.
5. Avoid using the same conduit or twisted wiring with others, such as...
6. It is not recommended to use mechanical switches or microswitches, as their lifespan is relatively short and miscounts can easily occur after a long time;
If you are using mechanical or microswitches, please try to use higher quality ones to avoid confusion. A strong magnetic switch is recommended.
Package contents:
1 x LED tachometer
1 x NPN Hall proximity sensor
1 x Magnet