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Activation Distances for R2B NC Reed SensorsRelease, operate and re-closure distances for the R2B-S normally closed SMD reed 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 our magnet selection guide.
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Actuation Sketch |
Magnet |
Dimensions |
Release Distance |
Operate Distance |
Re-closure Zone |
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4.0 x 1.5 x 1.5 |
3.5 - 7.0 | 4.0 - 7.5 | < 0.5 | |
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Ø2.0 x 4.0 |
4.0 - 7.5 | 5.0 - 8.0 | < 1.0 | ||
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6.0 x 2.5 x 2.5 |
8.0 - 12.5 | 10.0 - 14.0 | < 3.5 | ||
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Ø3.0 x 7.0 |
10.0 - 15.0 | 11.0 - 16.0 | < 4.5 | ||
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8.0 x 3.0 x 3.0 |
11.5 - 17.5 | 13.0 - 19.0 | < 5.5 | ||
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Ø4.0 x 10.0 |
15.0 - 22.0 | 17.0 - 23.0 | < 7.0 | ||
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19.0 x 4.0 x 4.0 |
21.0 - 31.5 | 23.5 - 34.0 | < 8.0 | ||
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Ø8.0 x 15.0 |
30.0 - 45.0 | 34.0 - 48.0 | < 15.0 |
R2B-S-1 (10-15 AT)|
Actuation Sketch |
Magnet |
Dimensions |
Release Distance |
Operate Distance |
Re-closure Zone |
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4.0 x 1.5 x 1.5 |
2.0 - 4.0 | 2.5 - 4.5 | < 0.5 | |
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Ø2.0 x 4.0 |
2.5 - 5.0 | 3.0 - 5.5 | < 1.0 | ||
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6.0 x 2.5 x 2.5 |
6.5 - 9.0 | 7.0 - 10.0 | < 3.0 | ||
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Ø3.0 x 7.0 |
8.0 - 10.5 | 9.0 - 11.0 | < 3.5 | ||
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8.0 x 3.0 x 3.0 |
9.5 - 12.5 | 10.0 - 13.5 | < 4.5 | ||
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Ø4.0 x 10.0 |
12.0 - 16.0 | 13.0 - 17.0 | < 5.0 | ||
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19.0 x 4.0 x 4.0 |
17.0 - 21.5 | 18.0 - 23.0 | < 7.0 | ||
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Ø8.0 x 15.0 |
26.0 - 32.0 | 27.0 - 33.0 | < 12.0 |
R2B-S-2 (15-20 AT)|
Actuation Sketch |
Magnet |
Dimensions |
Release Distance |
Operate Distance |
Re-closure Zone |
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4.0 x 1.5 x 1.5 |
1.5 - 2.5 | 2.0 - 3.0 | < 0.5 | |
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Ø2.0 x 4.0 |
2.0 - 3.0 | 2.5 - 3.5 | < 1.0 | ||
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6.0 x 2.5 x 2.5 |
5.0 - 7.0 | 5.5 - 8.0 | < 2.5 | ||
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Ø3.0 x 7.0 |
6.5 - 8.5 | 7.0 - 9.5 | < 3.0 | ||
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8.0 x 3.0 x 3.0 |
8.0 - 10.0 | 8.5 - 11.0 | < 4.0 | ||
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Ø4.0 x 10.0 |
10.0 - 12.5 | 10.5 - 14.0 | < 5.0 | ||
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19.0 x 4.0 x 4.0 |
14.5 - 18.0 | 15.0 - 19.0 | < 6.0 | ||
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Ø8.0 x 15.0 |
22.0 - 26.5 | 22.5 - 28.5 | < 10.0 |
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Ultra Miniature |
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Reed Relays and Electronics India Limited, 2008
