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Speed Probes |
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Fundamentals
The speed probe is an alternating voltage generator producing an electrical signal. The frequency of this electrical signal is proportional to the engine shaft speed. The speed probe contains one or two coils and a rare earth permanent magnet. In rotating machinery the speed probe sensing surface faces the phonic wheel. The magnetic flux varies in density with the passage of each tooth. These flux changes induce an alternating voltage in the coil surrounding the permanent magnet, the frequency of which is a function of shaft speed.
Typical Sensor Features:
- One or several complete enclosed sensing elements
- Active system, no supply voltage required
- Wide temperature range
- Advanced wire interconnection technique
- Hermetically sealed construction
- Stainless steel, titanium, or Inconel 600 housing
- Designed for aircraft engine
- Environmental conditions
- No scheduled maintenance
- High MTBF - basic design adaptable for customised construction
Typical Applications for Speed Probes:
- Shaft rotational position
- Direction of rotation
- Shaft torque
- Rotor revolution
- Wheel Speed
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Vibro-Meter UK
The Laurels, Jays Close
Viables Industrial Estate
Basingstoke, Hampshire
RG22 4BF, UK
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Tel: +44 (0)1256 84193
Fax: +44 (0)1256 349286
send email
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Vibro-Meter France
8, Chemin de l'Etang
BP 15
F-16730 Fleac
France
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Tel: +33 (0) 5 4524 0404
Fax: +33 (0) 5 4524 4593
send email
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