LED Digital Tachometers for Motion, Speed and Force Electronic Tachometer NPN Hall Effect Proximity Sensor RPM Gauge (red)

Specifications: Measurement accuracy: ±0.1% Display mode: 0.56" LED Display refresh rate: >3 times/s Working power supply: DC8-24V, 30mA; Measurement range: 10-9999 RPM Hall effect proximity sensor: magnetic appearance Size: 80x42x25mm/3.14x1.65x0.98 inches LED display (optional): red, blue Weight: 80g (red), 105g (blue) Out-of-range display: the first reading displays "1" or "-1", and the last three readings do not display Precautions: 1. Connect the plug correctly according to the wiring diagram. 2. Strong electromagnetic interference should be avoided, and it is preferable to use shielded or double-stranded wire to measure the conductors. 3. The meter's counting signal and the zero-compensation input switch or circuit should be as close as possible to the meter's workpiece to make the design line as short as possible. 4. Avoid using other wires such as high-voltage wires, power supplies, and tin-lined cables with the same or twisted tube. Trace the line to avoid unnecessary interference. If necessary, please use shielded wire; the shielding layer connects the "+" terminal of the meter terminals. 5. It is not recommended to use a mechanical switch or a micro-switch because they have a relatively short lifespan and can be mistakenly counted after a long period. If you must, try higher quality models; a magnetic control switch is strongly suggested.
Package includes: 1x Tachometer 1x Hall NPN proximity sensor