Variable Reluctance Speed Sensors (VRS)

Mag-Pickups / VRS Pickups

These passive sensors generate their own sinusoidal signal at the same rate as targets passing by. The magnitude of the voltage level is proportional to the speed of the target. They are used in a wide range of applications for speed sensing of ferrous targets. Flowmeter turbine blades, power transmission and timing gears, engine flywheels, bolt heads, and shaft keyways are typical targets.
Low drag versions are available for use with flow metering of low viscosity fluids and gases. Dual output versions are available for redundancy or driving two systems. High temperature and cryogenic versions can be used in temperatures from -268°C to +232°C (-450°F to +450°F). Extreme temperature versions can be special ordered for temperatures up to 450°C (850°F).
Intrinsically Safe and Explosion/Flame Proof versions are also available for Hazardous Locations. The output of this sensor can be converted to a digital signal with a Signal Amplifier. This sensor type can typically be replaced by an Amplified Variable Reluctance Speed Sensor or Hall Effect.


  • Flow metering
  • Engine and turbo speed
  • Anti-lock braking systems (ABS)
  • Traction Control systems
  • Conveyor / Process speed
  • Oily, wet, and harsh environments
  • High temperature / high-pressure

Data Sheets

See the Data sheets below for sensor details and options.

Standard versions

3/16” (#10) & M5 mounting thread – 0002 Bulletin
1/4”, 5/16”, M6 & M8 mounting thread – 0004 & 0005 Bulletin
3/8” & M10 mounting thread – 0007, 0008, & 0009 Bulletin
1/2” & M12 mounting thread – 0010 & 0011 Bulletin
5/8” & M16 mounting thread – 0015, 0017, & 0019 Bulletin
11/16” mounting thread – 0026, 0027, & 0033 Bulletin
3/4” & M18 mounting thread – 0029, 0030, 0035, & 0038 Bulletin

Special Housing versions

5/8” mounting thread – 0014 & 0018 Bulletin

Dual output versions

Connector style – 0021 Bulletin

Wire / Cable style – 0022 Bulletin

Extreme Temperature versions

Connector & Wire / Cable style – 0024 & 0025 Bulletin

Alternative Products

Signal Amplifiers (Pre-Amps) can be used to transform the sinusoidal output to a digital output (square wave signal).

Amplified Variable Reluctance Sensors integrate an amplifier circuit built into the sensor housing. These sensors offer a wide range of digital output options.

Hall Effect Zero Speed Sensors use a fully digital sensing technology that can replace Variable Reluctance Speed Sensors in many applications.

RF Eddy Current Speed Sensors sense with no magnetic drag. For flow metering applications this results in better sensing at low flow conditions.

Hazardous Locations Sensors for use in explosive atmospheres are also available.

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