4 Digital LED-Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPN Set

Description

4 Digital LED-Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPN Set
DESCRIPTION
4 Digital LED-Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPN Set
Overview:
The digital panel meter adopts the latest A/D conversion chip and high-stability reference IC, and adopts chip components, and the circuit design is reasonable. It can be applied to the measurement of voltage and current, or it can be connected with external sensors to measure various physical quantities such as temperature, pressure and displacement. It should be used for display of various digital instruments. The product has good stability, high measurement accuracy and strong anti-interference ability. The exterior is standard in size and easy to install.
Features:
1. Input pulse signal: NPN/PNP open collector, contact switch, non-contact switch, level pulse
2. Input signal voltage: Low level: -30V-0.6V, High level: 4-30V
3. Measurement range: Speed: 10-9999RPM
Specifications:
1. Measurement accuracy: ±0.1%, reading ±1 word.
2. Display mode: 0.56 red, green, blue LED optional
3. Four-digit reading 10-9999 rpm
4. Display refresh rate: >3 times/second
5. Working power supply: DC8-24V, 30mA and 5v power supply version.
6. Dimensions: 79×42×25mm
7. Installation size: 76×39mm
8. Weight: tachometer 47 grams Hall sensor + magnet 45 grams
9. The Hall sensor is NPN normally open type, the detection distance of the Hall sensor is within 10MM, the diameter of the Hall sensor installation is 12MM, and the wiring length is 1.2M
10. Over-range display: the first position shows "1" or "-1", the last three digits do not display
Precautions for use:
1. Connect the plug correctly according to the wiring requirements.
2. Should avoid strong electromagnetic interference, the measurement wire is best to use shielded wire or twisted pair.
3. The counter signal and the switch or circuit of the clear signal input should be as close as possible to the terminal of the counter to make the signal line as short as possible.
4. Avoid with other wires such as strong electric wires or power wires or stranded wires to avoid unnecessary interference. If necessary, use shielded wires and the shield is connected to the counting terminal “+”.
5. It is not recommended to use mechanical switches or micro switches, because their life is relatively short, it is easy to count down after a long time; if using mechanical switches or micro switches, please try to use better quality, so as not to count errors, strong Recommended magnetic switch.
Pacage Include:
1*LED tachometer
1*Hall Proximity Switch Sensor NPN
1*Bracket
Note:
- Please allow minors errors due to manual measurement. Thanks for your understanding.
- Monitors are not calibrated same, item colour displayed in photos may be showing slightly different from the real object. Please take the real one as standard.
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