These sensors require that the target be a magnet, such as magnets embedded in gear teeth, blade tips, or ring magnets. They also must be oriented to the direction of target movement. The advantage of this series, versus other Hall Effect types, is that they can sense longer air gap distances, thereby enabling the sensor to effectively sense targets as much as 0.200" to 0.250" away, depending on target geometry and magnetic field strength. These sensors integrate a preamplifier/signal conditioner within the sensor housing that provides excellent noise immunity and greater transmission capability. They also have a unique circuit design that offers complete protection in the event of connection mis-wiring. 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.

Product Specifications

HM series Hall Effect sensors are manufactured on a custom basis to meet the specifications and requirements of a particular application. MSI can make custom Hall Effect sensors in customer-specified lengths, diameters, configurations, mounting threads (e.g., metric) as well as with different operating specifications and options like pigtail leads, NPT threads for explosion proof applications, etc. In addition, for lower cost, high volume applications, MSI manufactures Hall Effect sensors that contain only the Hall Effect element, without special circuitry to guard against incorrect hook-up. Please contact us and we would be happy to make a product that meets your specifications.

Features and Specifications