Information about Magnetic Speed Sensors

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About Magnetic Speed Sensors

Magnetic speed sensors use a magnet as the sensing element or sensed target in order to capture rotational or linear speed. Typically, they are used as gear-tooth speed sensors or incorporated into stroboscopes or tachometers. Technology choices magnetic speed sensors include magnetoresistive, inductive, variable reluctance, and Hall Effect. With magnetoresistive sensors, the resistance of the sensing element is a function of the direction and magnitude (proximity) of an applied magnetic field. With inductive sensors, an oscillator circuit generates a radio frequency (RF) electromagnetic field that radiates from a ferrite core and coil assembly. The field is directed at the sensor face. When a metal target enters the field, eddy currents are induced into the surfaces of the target. This causes a reduction in the amplitude of the oscillator circuit (change in inductance).

Products & Services Related to Magnetic Speed Sensors

Hall Effect Position Sensors

Hall effect position sensors are non-contact devices that convert energy from a magnetic field into an electrical signal. They use the Hall effect, a voltage caused by current-flow in the presence of a magnetic field.

Hall Effect Proximity Sensors

Hall effect proximity sensors are used to detect the proximity, presence or absence of a magnetic object using a critical distance.

Inductive Linear Position Sensors and Switches

Inductive linear position sensors and switches are noncontact devices that determine an object's coordinates (linear or angular) with respect to a reference.

Inductive Proximity Sensors

Inductive proximity sensors detect the presence or absence of an object using a critical distance.

Magnetic Proximity Sensors

Magnetic proximity sensors include devices that work on inductive, variable reluctance, magneto resistive or Hall effect principles. Proximity sensors detect the presence or absence of an object using a critical distance.

Magnetoresistive Linear Position Sensors and Switches

Magnetoresistive linear position sensors and switches have a linear resistance output signal representing the distance an object is from a reference point.

Variable Resistance Linear Position Sensors and Switches

Variable reluctance linear position sensors and switches are noncontact devices that use variable reluctance based technology, and whose output signal represents the distance between an object and a reference point.

Engineering Web: Magnetic Speed Sensors - Machine Design

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Proximity Sensor, Pressure Transducer & Pressure Sensor... The Sensors Reference Center, from Machine Design, is designed to provide design engineers with the information they need to specify or purchase
Magnetic Sensing \| Machine Design Magnetic sensors built with special materials operate at cyrogenic temperatures and withstand temperatures excursions greater than 400°F. Magnetic
Sensors Track Speed \| Machine Design SENSORS TRACK SPEED The output switches precisely when the difference in magnetic field strength between the two Hall-effect elements is zero.

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