Learn more about the sensing technologies, that JAQUET uses in its speed sensors. For detailled technical information, please download the JAQUET sensor technologies PDF.
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Function
A ferro magnetic pole wheel passing the sensor head alters the magnetic field in a magnetically biased coil. Based on the law of induction, an A.C. output voltage is thereby generated, with the frequency and amplitude proportional to the speed of the pole wheel.
Applications
- Speed measurement of frequencies > 10 Hz
- With or without power supply
- Robust to extreme environmental conditions (e.g. temperature)
- Intrinsically safe Ex i versions available
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Function
A ferro magnetic pole wheel passing the sensor head influences the voltage in an integrated Hall element. The Hall voltage is amplified to a square wave signal with the frequency dependent on pole wheel speed.
Applications
- Speed measurement of frequencies > 0.1 Hz
- With or without power supply
- 2 sensors can be used for direction sensing
- Intrinsically safe Ex i versions available
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Function
A ferro magnetic pole wheel passing the sensor head influences the voltage in two adjusted Hall elements. The Hall voltage difference is amplified to a square wave signal with the frequency dependent on pole wheel speed.
Applications
- Static: > 0 Hz / pole wheel module > 1
- Dynamic: > 5 Hz / pole wheel module > 0.5
- Square wave signal output
- 2 sensors can be used for direction sensing
- Dual sensing available (2 phase shifted square waves)
- Intrinsically safe Ex i versions available
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Function
A metallic pole wheel passing the sensor head influences the damping in an oscillator. This changes the current consumption of the HF oscillator and superimposes an A.C. signal on the D.C. biased output. The signal frequency is proportional to the pole wheel speed.
Applications
- Speed measurement of frequencies > 0 Hz
- Pole wheel module > 2
- Sensing of various metallic pole wheels
- 2 sensors can be used for direction sensing
- Intrinsically safe Ex i versions available
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