Digital tachometer for measuring rotational speed + blue LED CF5135C-Z

Digital LED tachometer CF5135C-Z

The digital tachometer LED CF5135C-Z with a blue display is a precision tool for measuring rotational speed. Results are shown on a clear LED screen in revolutions per minute (RPM). The device uses an NPN Hall sensor that works with a magnet mounted on the rotating element. This makes the meter ideal for measuring the speed of shafts, fans, and other rotating machine parts.

Key technical features

Connecting the tachometer is straightforward and requires the correct wires. For the sensor: black (output signal), brown (power +) and blue (power -). The display itself is powered via black (-) and red (+) wires.

When installing, ensure the magnet faces the sensor with the correct pole. If the display shows 0000 or no reading, flip the magnet. In addition, the tachometer displays LLLL when it does not receive a signal from the inductive sensor.

Specifications

• Display: Blue LED 67 x 32 mm
• Sensor: NJK-5002C
• Magnetic sensor: M12 mm cylinder
• Measuring range: 10 mm
• Operating temperature: 0-50°C
• Power supply: DC 8-24V 40mA
• Speed measurement range: 10-9999 RPM
• Measurement accuracy: 0.1%

Example applications

• Measuring rotational speed of spindles in CNC machine tools and lathes
• Monitoring industrial fan and extractor speeds
• Controlling drive shaft speeds in agricultural machinery
• Diagnostics of electric and combustion engines
• Speed measurements on conveyor belts and transport systems

Benefits

• High measurement precision with 0.1% accuracy
• Easy-to-read results in any conditions thanks to the bright blue LED display
• Wide supply voltage range (DC 8-24V) for easy integration with different systems
• Reliable non-contact operation using an NPN Hall sensor
• Quick troubleshooting of sensor issues via built-in error messages (LLLL and 0000)