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Our Speed Sensors

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 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.

The H series of Hall Effect sensors are oriented, which means that they require orientation to the direction of target movement. They are recommended for use with finer pitch targets. Our Hall Effect sensors incorporate a magnet within the sensor which enables them to sense ferrous metal in addition to magnet targets. Our Hall Effect sensors can be optimized to detect fine as well as large pitch targets. | more info
Motion Sensors' HN series of Hall Effect sensors are non-oriented and do not require orientation, offering ease of installation. MSI Hall Effect Speed Sensors are engineered to provide extremely accurate tooth edge detection when used with larger pitch targets. The non-oriented HN series offers the distinctive advantage of not requiring orientation to the target. | more info
The HD series of Dual Channel Hall Effect sensors are available with quadrature output. These Hall Effect speed sensors are offered in options with or without direction logic. Isolated and differential output options are available for this series. The output frequency of the HD sensor has a digital pulse that can be correlated to determine flow rate, RPM, or velocity as well as the direction of target rotation. | more info
In addition to the standard models, all Hall Effect series pickups are available in custom lengths, diameters, configurations, and mounting threads. Motion Sensors specializes in customizing application operating specifications (e.g. custom logic levels) as well as physical parameters such as mounting flanges, fixed air gaps, and custom cables and connectors. | more info
Our Intrinsically Safe Hall Effect pickups provide the same high quality performance as our standard Hall Effect speed sensors. These sensors are certified intrinsically safe to CSA (with NRTL/C), ATEX (2014/34/EU), and IECEx (Ex ia) and can be customized to meet customer-specified lengths, diameters, configurations, and mounting threads as well as different operating specifications and options. | more info

MSI offers Explosion Proof (Ex d) Hall Effect speed sensors which are certified for use in potentially explosive atmospheres. These flameproof sensors are custom manufactured to meet the specifications and requirements of a particular application. Our certifications permit us to manufacture a custom version under the existing certifications, which makes our process quick and cost effective. | more info

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).

ATEX & IECEx Certified: Custom & Standard Speed Sensors for Intrinsically Safe applications (also approved by CSA w/NRTL/C)