Achieve High Accuracy Measurement with New Position Sensors from Measurement Specialties

Magneto-resistive sensors in compact DFN package simplifies PCB assembly

Jun 18, 2014, 11:31 ET from Measurement Specialties, Inc.

HAMPTON, Va., June 18, 2014 /PRNewswire/ -- Measurement Specialties (NASDAQ: MEAS), an expert in sensor design and manufacturing, has expanded its magneto-resistive (MR) product offering with a line of highly accurate, low power position sensors housed in a compact DFN package. The KMXP series can be easily soldered to a PCB via automated standard assembly methods, significantly reducing production costs.

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The contactless sensors precisely measure linear displacement, movements, torque and velocities in dirty and harsh environments typical found in vehicle, engine, automation and general industrial applications. 

A high operating temperature of +150 degrees C, and small dimensions of 2 mm x 6 mm x 0.75 mm, further opens the range of use for these compact, precision position sensors.

The use of pole wheels allow for highly accurate angular measurements on the shaft circumference, easily achieving resolutions better than 0.001 degrees (19-bit).

The sensors' small wall thickness allows for large air gaps—up to half of the sensor's respective pole pitch—that won't affect performance, since signal amplitudes only depend on the magnetic field direction and are nearly independent of the magnetic field strength.

Both incremental and absolute position detection is possible with the non-contact, anisotropic magneto-resistive measurement principle of the sensors.  Because the KMXP sensors detect a magnetic field gradient, they are virtually insensitive to homogenous stray fields and vibrations. This contributes to the high accuracy measurement by allowing for increased resolution at high speeds, up to several meters per second.

The output of the new sensors is sine/cosine with 10 mV/V. In combination with an interpolator device and magnetic scales, measurement ranges from micrometre to km are possible with high precision.

Current models of the linear position sensor series are the 2 mm pole pitch KMXP2000 and 5 mm pole pitch KMXP5000, with a 1 mm pole pitch version scheduled for later this year. All are pin-compatible and employ a common PCB layout to simplify design. The KMXP series is REACH, 3TG and RoHS-compliant.

Technical Specifications:

  • Compact DFN package: 2 mm x 6 mm x 0.75 mm
  • Magneto-resistive sensor technology for highly accurate, contactless sensing in harsh environments
  • Small wall thickness enables large air gaps that won't affect performance
  • Extended operating temperature: -40 degrees C to +150 degrees C
  • Sine/cosine output with 10 mV/V 
  • Measurement ranges from micrometre to km

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READER SERVICE INQUIRIES:  Please direct all product inquiries to Bob Arkell, NA Marketing Manager;; 760-466-7614.

EDITOR'S NOTE:  Measurement Specialties, Inc. (NASDAQ: MEAS) designs and manufactures sensors and sensor-based systems to precisely and cost-effectively measure a number of physical characteristics in several markets from military and defense to medical, consumer and industrial. 

By accurately measuring areas such as pressure, temperature, position, level, tilt, force, vibration, torque, humidity, fluid properties, mass airflow and photo optics, our sensors enhance product functionality, efficiency and safety.

Our devices are embedded by original equipment manufacturers (OEMs) or used as stand-alone sensors for test and measurement to provide critical monitoring, feedback and control input.  MEAS also offers extensive sensor customization services ranging from special calibrations and connectors to custom label designs.

Editorial Contact: The Simon Group, Inc. Beth Smith or Joanna Puglisi-Barley Phone: (215) 453-8700 E-mail:

SOURCE Measurement Specialties, Inc.