The magnetic-electric speed sensor utilizes the principle of electromagnetic induction to achieve speed measurement。It features high output signal, excellent anti-interference performance, no need for external power supply, and can be used in harsh environments such as smoke, oil vapor, and moisture.

1. Feature：

Magnetic electric speed sensor is a passive sensor designed for speed measuring gears. The magnetic gap change caused by the rotation of the speed measuring gear generates an induced electromotive force in the probe coil, and its amplitude is related to the speed. The higher the speed, the higher the output voltage, and the output frequency is proportional to the speed.As the speed further increases, the magnetic circuit loss increases and the output potential tends to saturate. When the speed is too high, the magnetic circuit loss intensifies and the potential sharply decreases.

2. Technical Specifications：

DC resistance:420Ω~ 460Ω(25℃)

Gear form:Modulus 2~4 (involute gear)

Operating temperature:-10 ~+120℃

Anti vibration:20g

Thread specifications:M16 * 1

(or customer request)

Measurement range:10～15000r/min（The gear has a number of teeth of 60）

Output signal amplitude：30r/min>500mV （Test conditions: The transmission gear has 60 teeth，The material is electrical steel with a modulus of 2 ，

The distance between the sensor end face and the tooth top is 1mm）The amplitude of the signal is proportional to the rotational speed and inversely proportional to the gap between the end face and the tooth tip.

Output voltage waveform: involute gear-Approximate sine wave,if the gear is slightly eccentric, it is an amplitude modulated sine wave. orifice plate-Approximate square wave

3. Gear material

Gear materials should be made of metal materials with strong magnetic permeability

4. Tooth profile

Forming an involute tooth profile is the most suitable tooth profile. Using large modulus gears or other tooth profiles will result in significant waveform distortion, which will hinder accurate measurements. If the spindle has axial movement, it should be noted that the center of the magnetic pole should be at the center position of the gear.

Gear module: 2~4

Tooth width （b）: greater than 5mm  

h=2.25×m

m：modulus

z：number of teeth

p：pitch