News Release

- New Product Information -

AKM expands the lineup of Semiconductor Magneto Resistive Elements with a 20-bit Magnetic Encoder; the MS0030 and MS0050 are now available

Product Name
Rotary Position Sensors >Semiconductor Magneto Resistive Element
Semiconductor Magneto Resistive Element (SMRE)
Machine Tools, High Resolution Absolute Encoder, AC Servo Motor
MS0030 / MS0050
MS0030 / MS0050
Semiconductor Magneto Resistive Element


Asahi Kasei Microdevices Corporation, (AKM), has newly added semiconductor magneto resistance elements (SMRE) that support the widely used gear wheel modules at m*= 0.3 / 0.5 in Europe, for encoders of machine tools.
AKM’s SMRE’s have good temperature characteristics with low variability among individual devices. More than 20-bit rotation angle accuracy can be achieved via angle detection through interpolation.
In addition, AKM has an extensive lineup of m = 0.2 / 0.4 / 0.8 corresponding products adopted by major machine tool manufacturers.

*Module (m) is the standard value representing the size of a gear. It is the ratio of the reference diameter, (d) of the gear divided by the number of teeth, (z). m = d/z

● Corresponding to gears widely used in Europe

m = 0.3 / 0.5 are gear modules mainly used in Europe.

● A magnetic encoder with 20-bit or more resolution can be achieved

An SMRE detects the change in the magnetic flux density generated between magnetic gears and the bias magnet. By interpolating the analog signal electrically, more than 20 bits accuracy of rotation detection can be achieved. This can be done even if it is a magnetic encoder, since the detection signal is a highly accurate sine or cosine wave. The analog signal has one cycle per tooth.

● Excellent Environment Resistance Solution

Because the SMRE detects a magnetic field, grit, dust, oil, etc. does not affect the signal, with excellent environmental resistance. An SMRE has extremely good temperature characteristics with low variability among individual devices, enabling accurate rotation detection.


Product NameModule (m)PKGNumber of elementOperation Temperature (°C)Note
MS0030  New0.31125
MS00420.42125Element spacing 1.9[mm]
MS0050  New0.51125
MSP0420.4DIP2100Element spacing 6.0[mm]
MSP0430.42100Element spacing 4.3[mm]
MSP0820.82100Element spacing 6.0[mm]
MSP2042.01125Railway products
MSP2542.51125Railway products
* Information on this page is current on the date of press release.
* AKM is trademarks of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.

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