Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

Actuation Distances for MS-228 Cylindrical Sensor

Operate and release distances for the MS-228 M8 Threaded Magnet Sensor in the three standard AT bands when actuated (as shown in the sketches) with NdFeB standard magnets is shown below. All distances given are in mm with tolerances of ±0.5mm. Although some of the AT band / magnet combinations will produce similar actuating distances, selecting the right AT band and magnet for an application is important and can be done by going through our AT band FAQ and magnet selection guide.

Tip to tip Actuation distances

MS-228 actuation-magnet tip to sensor tip
Magnet actuation direction

Operate Band 20-25 (AT)

MagnetDimensionsOperate DistanceRelease Distance
NDR-T4.0 x 1.5 x 1.5N/AN/A
NDR-S6.0 x 2.5 x 2.5N/AN/A
NDR-M8.0 x 3.0 x 3.03.0 – 5.07.0 – 8.0
NDR-I12.0 x 3.5 x 3.56.0 – 8.011.0 – 12.0
NDR-L19.0 x 4.0 x 4.09.0 – 12.015.0 – 16.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.01.0 – 2.04.0 – 5.0
NDC-MØ4.0 x 10.05.0 – 7.010.0 – 11.0
NDC-IØ6.0 x 12.013.0 – 15.019.0 – 20.0
NDC-LØ8.0 x 15.021.0 – 24.029.0 – 30.0

Operate Band 25-30 (AT)

MagnetDimensionsOperate DistanceRelease Distance
NDR-T4.0 x 1.5 x 1.5N/AN/A
NDR-S6.0 x 2.5 x 2.5N/AN/A
NDR-M8.0 x 3.0 x 3.01.5 – 3.06.0 – 7.0
NDR-I12.0 x 3.5 x 3.54.5 – 6.010.0 – 11.0
NDR-L19.0 x 4.0 x 4.08.0 – 9.014.0 – 15.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.0N/AN/A
NDC-MØ4.0 x 10.03.5 – 5.08.0 – 10.0
NDC-IØ6.0 x 12.011.0 – 13.018.0 – 19.0
NDC-LØ8.0 x 15.019.0 – 21.027.0 – 29.0

Operate Band 30-35 (AT)

MagnetDimensionsOperate DistanceRelease Distance
NDR-T4.0 x 1.5 x 1.5N/AN/A
NDR-S6.0 x 2.5 x 2.5N/AN/A
NDR-M8.0 x 3.0 x 3.0N/AN/A
NDR-I12.0 x 3.5 x 3.53.0 – 4.510.0 – 11.0
NDR-L19.0 x 4.0 x 4.06.0 – 8.014.0 – 16.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.0N/AN/A
NDC-MØ4.0 x 10.02.0 – 3.59.0 – 10.0
NDC-IØ6.0 x 12.09.0 – 11.018.0 – 20.0
NDC-LØ8.0 x 15.016.0 – 19.026.0 – 28.0

Parallel Actuation Distances

MS-228 actuation-magnet parallel to sensor
Magnet actuation direction

Operate Band 20-25 (AT)

MagnetDimensionsOperate DistanceRelease Distance
NDR-T4.0 x 1.5 x 1.5N/AN/A
NDR-S6.0 x 2.5 x 2.51.0 – 3.04.0 – 5.0
NDR-M8.0 x 3.0 x 3.06.0 – 7.010.0 – 11.0
NDR-I12.0 x 3.5 x 3.510.0 – 11.014.0 – 16.0
NDR-L19.0 x 4.0 x 4.014.0 – 15.019.0 – 20.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.04.0 – 5.06.0 – 7.0
NDC-MØ4.0 x 10.09.0 – 10.013.0 – 14.0
NDC-IØ6.0 x 12.016.0 – 17.021.0 – 22.0
NDC-LØ8.0 x 15.023.0 – 25.029.0 – 30.0

Operate Band 25-30 (AT)

MagnetDimensionsOperate DistanceRelease Distance
NDR-T4.0 x 1.5 x 1.5N/AN/A
NDR-S6.0 x 2.5 x 2.51.5 – 2.03.0 – 4.0
NDR-M8.0 x 3.0 x 3.05.0 – 6.08.0 – 9.0
NDR-I12.0 x 3.5 x 3.59.0 – 10.012.0 – 13.0
NDR-L19.0 x 4.0 x 4.012.0 – 14.018.0 – 20.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.03.0 – 4.06.0 – 7.0
NDC-MØ4.0 x 10.08.0 – 9.011.0 – 12.0
NDC-IØ6.0 x 12.014.0 – 16.020.0 – 21.0
NDC-LØ8.0 x 15.020.0 – 23.028.0 – 29.0

Operate Band 30-35 (AT)

MagnetDimensionsOperate DistanceRelease Distance
NDR-T4.0 x 1.5 x 1.5N/AN/A
NDR-S6.0 x 2.5 x 2.50.5 – 1.53.0 – 6.0
NDR-M8.0 x 3.0 x 3.04.0 – 5.08.0 – 10.0
NDR-I12.0 x 3.5 x 3.58.0 – 9.013.0 – 20.0
NDR-L19.0 x 4.0 x 4.012.0 – 13.019.0 – 21.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.02.0 – 3.06.0 – 9.0
NDC-MØ4.0 x 10.07.0 – 8.012.0 – 16.0
NDC-IØ6.0 x 12.013.0 – 14.020.0 – 24.0
NDC-LØ8.0 x 15.019.0 – 20.027.0 – 28.0

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