Gear Speed Sensor/SM39-SP Speed (Tachometer) Sensor

 Application

  The product adopts a standard round tube waterproof structure, which has the advantages of being waterproof, dustproof, and oil-proof, and can work reliably in harsh environments. It is suitable for control fields such as automobiles and industrial automation.

  Features

  SM39 series gear speed sensor is an advanced speed sensor used for non-contact detection of gear speed. It outputs square wave signals in OC gate mode with strong anti-electromagnetic interference ability. It can be directly connected to TTL, CMOS and other logic circuits after adjusting the pull-up resistor. It can form a speed measurement and control system when matched with a speed meter.

  Performance parameters

  1. Rated detection distance: ≤3mm

  2. Speed measurement range: 0Hz～25KHz

  3. Output waveform: square wave (NPN type, pull-up effective)

  4. Duty cycle: 0.5±0.2

  5. Protection function: with power reverse connection protection and output short circuit instantaneous protection

  6. Performance requirements of the gear being tested

  Modulus: m ≥ 1;

  Tooth shape: involute or cylindrical spur;

  Gear thickness: ≥3mm;

  Gear material: magnetic material

  7. With pulse indicator light, it is convenient for users to debug.

  Technical indicators

  1. Power supply: DC8~26V

  2. Input sensitivity: 2.0±1.0mV/V

  3. Static power consumption current: ≤28mA

  4. Leakage current when output is cut off: ≤20uA

  5. Output low level saturation voltage (V): ≤20uA

  6. Rising edge time tr: ≤1.0us

  7. Falling edge time tf: ≤1.0us

  8. OC gate output: high breakdown voltage type, maximum breakdown voltage 160V; maximum continuous current allowed is 600mA; maximum power consumption allowed is 625mW at 25℃, and decreases by 5mW/℃ above 25℃.

  9. Working temperature:

  10. Ambient humidity: ≤95%RH

  11. Installation method: thread installation, M16x1

  12. Material: brass nickel plated

  13. Weight: 200g

  14. Overall dimensions: φ20mm*90mm