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 R2B NC Reed Sensors

Operate and release distances for the R2B Normally closed reed sensor in the two standard AT bands when actuated with NdFeB standard magnets are listed 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 our magnet selection guide.

Actuation Distances for R2B-S Gull-wing SMD

R5B Magnet Actuation
Magnet Actuation Direction

Release Band 10-15 (AT)

MagnetDimensionsRelease DistanceOperate DistanceRe-Closure
NDR-T4.0 x 1.5 x 1.52.0 – 4.02.5 – 4.5 < 0.5
NDR-S6.0 x 2.5 x 2.56.5 – 9.07.0 – 10.0 < 3.0
NDR-M8.0 x 3.0 x 3.09.5 – 12.510.0 – 13.5 < 4.5
NDR-I12.0 x 3.5 x 3.5
NDR-L19.0 x 4.0 x 4.017.0 – 21.518.0 – 23.0 < 7.0
NDC-TØ2.0 x 4.02.5 – 5.03.0 – 5.5 < 1.0
NDC-SØ3.0 x 7.08.0 – 10.59.0 – 11.0 < 3.5
NDC-MØ4.0 x 10.012.0 – 16.013.0 – 17.0 < 5.0
NDC-IØ6.0 x 12.0
NDC-LØ8.0 x 15.026.0 – 32.027.0 – 33.0 < 12.0

Release Band 15-20 (AT)

MagnetDimensionsRelease DistanceOperate DistanceRe-Closure
NDR-T4.0 x 1.5 x 1.51.5 – 2.52.0 – 3.0 < 0.5
NDR-S6.0 x 2.5 x 2.55.0 – 7.05.5 – 8.0 < 2.5
NDR-M8.0 x 3.0 x 3.08.0 – 10.08.5 – 11.0 < 4.0
NDR-I12.0 x 3.5 x 3.5
NDR-L19.0 x 4.0 x 4.014.5 – 18.015.0 – 19.0 < 6.0
NDC-TØ2.0 x 4.02.0 – 3.02.5 – 3.5 < 1.0
NDC-SØ3.0 x 7.06.5 – 8.57.0 – 9.5 < 3.0
NDC-MØ4.0 x 10.010.0 – 12.510.5 – 14.0 < 5.0
NDC-IØ6.0 x 12.0
NDC-LØ8.0 x 15.022.5 – 26.522.5 – 28.5 < 10.0

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 ->

Jul 24, 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 ->

Jul 24, 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 ->

Jul 24, 2024