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-216-L Cylindrical Sensors

Operate and release distances for the MS-216 Large cylindrical 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-216-L 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 3.01.0 – 3.07.0 – 8.0
NDR-I12.0 x 3.5 x 3.55.0 – 7.011.0 – 13.0
NDR-L19.0 x 4.0 x 4.09.0 – 11.017.0 – 19.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.0N/AN/A
NDC-MØ4.0 x 10.04.0 – 6.010.0 – 11.0
NDC-IØ6.0 x 12.012.0 – 14.019.0 – 22.0
NDC-LØ8.0 x 15.020.0 – 23.030.0 – 33.0

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 3.0N/AN/A
NDR-I12.0 x 3.5 x 3.53.0 – 5.08.0 – 11.5
NDR-L19.0 x 4.0 x 4.06.0 – 9.012.0 – 17.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.0N/AN/A
NDC-MØ4.0 x 10.02.0 – 4.07.0 – 10.0
NDC-IØ6.0 x 12.010.0 – 12.015.0 – 19.0
NDC-LØ8.0 x 15.017.0 – 20.024.0 – 30.0

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 2.53.0 – 4.04.5 – 5.0
NDR-M8.0 x 3.0 x 3.06.0- 7.09.0 – 10.0
NDR-I12.0 x 3.5 x 3.59.0 – 12.012.0 – 15.0
NDR-L19.0 x 4.0 x 4.014.0 – 16.017.5 – 20.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.05.0 – 6.07.0 – 8.0
NDC-MØ4.0 x 10.010.0 – 11.013.0 – 14.0
NDC-IØ6.0 x 12.016.0 – 17.020.0 – 21.0
NDC-LØ8.0 x 15.020.0 – 23.024.0 – 28.0

Parallel Actuation Distances

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 2.54.0 – 5.06.0 – 7.0
NDR-M8.0 x 3.0 x 3.08.0 – 9.012.0 – 13.0
NDR-I12.0 x 3.5 x 3.511.0 – 12.016.0 – 18.0
NDR-L19.0 x 4.0 x 4.017.0 – 18.023.0 – 24.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.05.0 – 6.08.0 – 9.0
NDC-MØ4.0 x 10.010.0 – 12.015.0 – 17.0
NDC-IØ6.0 x 12.019.0 – 20.026.0 – 27.0
NDC-LØ8.0 x 15.024.0 – 28.034.0 – 37.0

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 2.53.0 – 4.04.0 – 7.0
NDR-M8.0 x 3.0 x 3.06.0 – 8.09.5 – 13.0
NDR-I12.0 x 3.5 x 3.511.0 – 12.015.0 – 17.0
NDR-L19.0 x 4.0 x 4.014.0 – 16.019.0 – 23.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.05.0 – 6.08.0 – 9.0
NDC-MØ4.0 x 10.010.0 – 11.514.0 – 17.0
NDC-IØ6.0 x 12.016.0 – 20.021.0 – 27.0
NDC-LØ8.0 x 15.022.0 – 25.028.0 – 34.0

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 2.53.0 – 4.04.5 – 5.0
NDR-M8.0 x 3.0 x 3.06.0- 7.09.0 – 10.0
NDR-I12.0 x 3.5 x 3.59.0 – 12.012.0 – 15.0
NDR-L19.0 x 4.0 x 4.014.0 – 16.017.5 – 20.0
NDC-TØ2.0 x 4.0N/AN/A
NDC-SØ3.0 x 7.05.0 – 6.07.0 – 8.0
NDC-MØ4.0 x 10.010.0 – 11.013.0 – 14.0
NDC-IØ6.0 x 12.016.0 – 17.020.0 – 21.0
NDC-LØ8.0 x 15.020.0 – 23.024.0 – 28.0

Ampere Turn Selection for your Application

Ampere Turn Selection Selecting the appropriate Ampere Turn (AT) or magnetic sensitivity for a Reed Switch, Reed Sensor, or Magnet Sensor is crucial in any Continue reading ->

Jun 16, 2024

Magnet Usage Best Practices

Magnet storage Rectangular Magnets Proper storage and magnet usage are critical to maintain their performance and prevent unintended hazards. Each Continue reading ->

Jun 17, 2024

Actuation Zones of a Reed Switch

Magnetic characteristics of a reed switch The following examples show typical actuation zones of a reed switch when actuated with a magnet from various axes. Generally, when a reed Continue reading ->

Jun 17, 2024

Magnet Information and Selection

Magnet Information In general magnet information, there are four families of magnets available commercially. Factors such as operating temperature, Continue reading ->

Jun 17, 2024