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Hall Effect Zero Speed Sensors
Hall Effect speed sensors are integrated units containing the transducer, magnet (as applicable), and electronics that are used to provide zero speed sensing. We manufacture them in both oriented and non-oriented models. In addition to the standard models, all Hall Effect series sensors are available in custom lengths, diameters, configurations, and mounting threads.
These hall effect gear tooth sensors are designed to sense the angular rotation of ferrous metal targets and are popular for a wide variety of applications including propulsion gear speed and direction, shaft speed and direction, as well as process-based applications that require operation at extremely slow speeds, such as measuring movement of a conveyor.
Motion Sensors Inc. specializes in customizing our sensors, and these hall effect transducers can be made to suit in terms of electrical specifications such as output logic levels, as well as physical parameters such as thread types, lengths, mounting flanges, cabling and connectors.
- Oriented Hall Effect Zero Speed Sensors – H Series
The H series of sensors is based on Hall Effect sensor technology, which can sense a change in target motion from true zero to 20 KHz. These sensors incorporate a magnet within the sensor, enabling them to sense ferrous metal as well as magnet targets and can be optimized to detect fine as well as large pitch targets. These sensors integrate a preamplifier/signal conditioner within the sensor housing that provides excellent noise immunity and greater transmission capability. The output frequency of these sensors has a square pulse waveform (digital) that directly relates to the number of turbine blades, gear teeth, etc. that have been sensed. These pulses, in turn, can be correlated to determine flow rate, RPM, or velocity. - Non-Oriented Hall Effect Sensors – HN Series
The HN series of speed sensors is based on Hall Effect sensor technology, which can sense a change in target motion from true zero to 20 KHz. These sensors incorporate a magnet within the sensor, enabling them to sense ferrous metal as well as magnetic targets. Maximum air gap sensing distances are typically 0.100″. Quadrature Output Dual Channel Speed Sensors – HD Series
The HD series quadrature output sensors are based on Hall Effect sensor technology, which can sense a change in target motion from true zero to 15 KHz. The HD series offers dual channel output and, where required, directional logic. The output frequency of HD sensors has a square pulse waveform (digital) that directly relates to the number of turbine blades, gear teeth, etc. that have been sensed. These pulses, in turn, can be correlated to determine flow rate, RPM, or velocity.HD sensors are based on the H series which incorporate a magnet within the sensor, enabling them to sense ferrous metal as well as magnet targets. Maximum air gap sensing distances are typically 0.100″ and these sensors can be optimized to detect fine as well as large pitch targets.
CUSTOM HALL EFFECT SPEED SENSOR MODELS
In addition to our standard models, Hall Effect speed sensors are available in custom lengths, diameters, configurations, and mounting threads. Custom operating specifications (output options, etc.) are available, as well as options such as pigtail leads or NPT threading. See additional sensor customization options.
PRINCIPLES OF OPERATION
Motion Sensors (MSI) Hall Effect (HE) sensors are true zero speed sensing devices that utilize a special solid state transducer chip that produces an output voltage when subjected to magnetic field changes. Hall Effect transducers are produced in many different sensitivities, configurations and output types; analog or digital. MSI standard HE sensors fall into two general categories; oriented – requires orientation to the direction of travel of the target and non-oriented – which does not, but generally has poorer performance when used with finer pitch targets. Standard series are Oriented: H HD and Non-oriented: HN.
Hall Effect sensors have limitations; “drag” when used with internal magnetics (zero-drag designs are possible employing external magnetic excitation), limited maximum sensing distance (compared to other technologies such as RF and maximum operating temperature compared to variable reluctance (VR)