Magnetic Pickups

Magnetic pickups are sensors that detect the speed of a moving part, typically in an engine. When objects like gears or shafts with keyways are passed through the sensor's magnetic field, the field oscillates, which induces  in the sensor's coil an AC voltage to be read by an electrical device such as a counter or oscilloscope.

Features of a magnetic pickup

A magnetic pickup is a coil that is wound around a magnetised probe. When objects like gear teeth, turbine rotor blades, slotted discs or shafts pass through the probe's magnetic field, the flux density is modulated, inducing a measurable AC voltage. Magnetic pickups tend to have a high-output voltage that is suitable for use with heavy-duty wiring. They are generally unaffected by dust and dirt, and are sturdier than most other plastic sensors. 

What can magnetic pickups be used for?

Magnetic pickups can be used as parts of speedometers or tachometers, which are integral parts of engines and industrial equipment.

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Description Price Body Style Output Type Detection Range Switching Frequency Reverse Polarity Protection Short Circuit Overload Protection Terminal Type Mounting Style Switching Current Maximum AC Voltage Maximum DC Voltage Thread Size Supply Voltage Housing Material
RS Stock No. 741-7534
Mfr. Part No.MR0100
Block PNP/NPN - 1 kHz Yes - Cable Flush 100 mA 120V 120V - 5 → 120 V ac/dc Polyamide
RS Stock No. 741-7531
Mfr. Part No.MK5100
Block PNP - >10 kHz Yes Yes Cable Flush 100 mA - 30V - 10 → 30 V dc Polyamide
RS Stock No. 741-7537
Mfr. Part No.MR0101
Block PNP/NPN - 1 kHz Yes - 3-Pin M8 Connector Flush 100 mA 50V 60V - 5 → 50 V ac, 5 → 60 V dc Polyamide