Actuation Distances for SM-1322 Reed Switches
Actuation distances for SM-1322 reed switches of cropped, SMD, Horizontal Mount and Vertical Mount formations in standard AT bands when actuated (as shown in the sketch) using our standard NdFeB magnets are shown below. All distances given are in mm and standard tolerances of ±0.5mm apply. 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 our AT band FAQ and magnet selection guide will help with this.
Activation Distances for SM-1322-L Cropped Reed Switch
SM-1322 cropped reed switch dimension
All dimensions are in mm
SM-1322-L (10-20 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
 |
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 2.5 – 4.0 | 3.5 – 5.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 6.5 – 10.0 | 8.0 – 11.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 9.5 – 12.0 | 11.5 – 14.0 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 13.5 – 18.0 | 15.5 – 20.0 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 17.0 – 23.0 | 20.0 – 25.0 | |
| NDC-T | Φ2.0 x 4.0 | 3.0 – 5.0 | 4.0 – 6.0 | |
| NDC-S | Φ3.0 x 7.0 | 7.5 – 11.0 | 9.0 – 12.0 | |
| NDC-M | Φ4.0 x 10 | 11.5 – 16.0 | 13.5 – 18.0 | |
| NDC-I | Φ6.0 x 12.0 | 18.0 – 24.0 | 21.0 – 26.0 | |
| NDC-L | Φ8.0 x 15.0 | 25.0 – 33.0 | 29.0 – 35.0 |
SM-1322-L (20-30 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 1.0 – 2.5 | 2.0 – 3.5 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 5.0 – 6.5 | 7.0 – 8.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 8.0 – 9.5 | 10.0 – 11.5 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 12.0 – 13.5 | 15.0 – 15.5 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 14.5 – 17.0 | 18.0 – 20.0 | |
| NDC-T | Φ2.0 x 4.0 | 2.0 – 3.0 | 3.0 – 4.0 | |
| NDC-S | Φ3.0 x 7.0 | 6.5 – 7.5 | 8.5 – 9.0 | |
| NDC-M | Φ4.0 x 10 | 10.0 – 11.5 | 12.5 – 13.5 | |
| NDR-C | Φ6.0 x 12.0 | 16.0 – 18.0 | 19.5 – 21.0 | |
| NDC-L | Φ8.0 x 15.0 | 21.0 – 25.0 | 26.5 – 29.0 |
SM-1322-L (30-40 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 0.5 – 1.0 | 1.0 – 2.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 4.0 – 5.0 | 7.0 – 7.5 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 6.0 – 8.0 | 9.0 – 10.0 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 10.0 – 12.0 | 13.0 – 14.0 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 13.0 – 14.5 | 17.0 – 18.0 | |
| NDC-T | Φ2.0 x 4.0 | 1.5 – 2.0 | 2.5 – 3.0 | |
| NDC-S | Φ3.0 x 7.0 | 5.0 – 6.5 | 8.0 – 8.5 | |
| NDC-M | Φ4.0 x 10 | 9.0 – 10.0 | 12.0 – 12.5 | |
| NDC-I | Φ6.0 x 12.0 | 14.0 – 16.0 | 18.5 – 19.5 | |
| NDC-L | Φ8.0 x 15.0 | 19.0 – 21.0 | 25.5 – 26.5 |
Activation Distances for SM-1322-L SMD Reed Switch
SM-1322 SMD reed switch dimension
All dimensions are in mm
SM-1322-L (10-20 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
 |
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 2.0 – 4.5 | 3.0 – 5.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 6.5 – 9.5 | 8.0 – 10.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 10.0 – 13.5 | 12.0 – 14.0 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 13.0 – 18.0 | 16.0 – 19.0 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 17.5 – 22.0 | 20.5 – 23.0 | |
| NDC-T | Φ2.0 x 4.0 | 2.5 – 5.0 | 3.5 – 5.5 | |
| NDC-S | Φ3.0 x 7.0 | 8.0 – 11.0 | 10.0 – 11.5 | |
| NDC-M | Φ4.0 x 10 | 12.0 – 17.0 | 15.0 – 18.0 | |
| NDC-I | Φ6.0 x 12.0 | 19.0 – 25.0 | 22.0 – 26.0 | |
| NDC-L | Φ8.0 x 15.0 | 26.0 – 34.0 | 30.0 – 35.0 |
SM-1322-L (20-30 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 1.5 – 2.0 | 2.5 – 3.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 5.5 – 6.5 | 7.5 – 8.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 8.5 – 10.0 | 10.5 – 12.0 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 11.5 – 13.0 | 14.5 – 16.0 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 15.0 – 17.5 | 19.0 – 20.5 | |
| NDC-T | Φ2.0 x 4.0 | 2.0 – 2.5 | 3.0 – 3.5 | |
| NDC-S | Φ3.0 x 7.0 | 7.0 – 8.0 | 9.0 – 10.0 | |
| NDC-M | Φ4.0 x 10 | 10.5 – 12.0 | 13.5 – 15.0 | |
| NDC-I | Φ6.0 x 12.0 | 16.0 – 19.0 | 20.0 – 22.0 | |
| NDC-L | Φ8.0 x 15.0 | 22.0 – 26.0 | 29.0 – 30.0 |
SM-1322-L (30-40 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 1.0 – 1.5 | 2.0 – 2.5 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 4.5 – 5.5 | 7.0 – 7.5 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 7.5 – 8.5 | 10.0 – 10.5 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 10.5 – 11.5 | 14.0 – 14.5 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 13.0 – 15.0 | 17.5 – 19.0 | |
| NDC-T | Φ2.0 x 4.0 | 1.5 – 2.0 | 2.5 – 3.0 | |
| NDC-S | Φ3.0 x 7.0 | 6.0 – 7.0 | 8.5 – 9.0 | |
| NDC-M | Φ4.0 x 10 | 9.5 – 10.5 | 12.5 – 13.5 | |
| NDC-I | Φ6.0 x 12.0 | 15.0 – 16.0 | 19.5 – 20.0 | |
| NDC-L | Φ8.0 x 15.0 | 20.0 – 22.0 | 26.0 – 29.0 |
Activation Distances for SM-1322-L Horizontal Mount Reed Switch
SM-1322 Horizontal Mount reed switch dimension
All dimensions are in mm
SM-1322-L (10-20 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
 |
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 2.0 – 4.5 | 3.5 – 5.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 6.5 – 9.5 | 8.5 – 10.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 10.0 – 14.0 | 12.5 – 15.0 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 13.0 – 19.0 | 16.5 – 20.5 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 17.5 – 25.5 | 21.5 – 28.0 | |
| NDC-T | Φ2.0 x 4.0 | 3.0 – 5.0 | 4.5 – 5.5 | |
| NDC-S | Φ3.0 x 7.0 | 8.0 – 11.0 | 10.0 – 12.0 | |
| NDC-M | Φ4.0 x 10 | 12.0 – 18.0 | 15.5 – 19.5 | |
| NDC-I | Φ6.0 x 12.0 | 19.0 – 27.0 | 24.0 – 30.0 | |
| NDC-L | Φ8.0 x 15.0 | 27.0 – 37.0 | 33.0 – 40.0 |
SM-1322-L (20-30 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 1.0 – 2.0 | 3.0 – 3.5 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 5.0 – 6.5 | 8.0 – 8.5 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 8.5 – 10.0 | 11.5 – 12.5 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 11.5 – 13.0 | 15.5 – 16.5 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 15.0 – 17.5 | 21.0 – 21.5 | |
| NDC-T | Φ2.0 x 4.0 | 2.0 – 3.0 | 4.0 – 4.5 | |
| NDC-S | Φ3.0 x 7.0 | 7.0 – 8.0 | 9.5 – 10.0 | |
| NDC-M | Φ4.0 x 10 | 10.5 – 12.0 | 15.0 – 15.5 | |
| NDC-I | Φ6.0 x 12.0 | 17.0 – 19.0 | 23.0 – 24.0 | |
| NDC-L | Φ8.0 x 15.0 | 23.0 – 27.0 | 32.0 – 33.0 |
SM-1322-L (30-40 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 0.5 – 1.0 | 1.5 – 3.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 4.0 – 5.0 | 6.5 – 8.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 7.0 – 8.5 | 10.0 – 11.5 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 10.5 – 11.5 | 14.0 – 15.5 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 13.0 – 15.0 | 18.0 – 21.0 | |
| NDC-T | Φ2.0 x 4.0 | 1.5 – 2.0 | 3.0 – 4.0 | |
| NDC-S | Φ3.0 x 7.0 | 6.0 – 7.0 | 8.5 – 9.5 | |
| NDC-M | Φ4.0 x 10 | 9.5 – 10.5 | 13.0 – 15.0 | |
| NDC-I | Φ6.0 x 12.0 | 15.0 – 17.0 | 20.0 – 23.0 | |
| NDC-L | Φ8.0 x 15.0 | 21.0 – 23.0 | 28.0 – 32.0 |
Activation Distances for SM-1322-L Vertical Mount Reed Switch
SM-1322 Vertical Mount reed switch dimension
All dimensions are in mm
SM-1322-L (10-20 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
 |
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 2.0 – 4.0 | 3.0 – 5.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 6.5 – 10.0 | 8.0 – 11.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 10.5 – 14.0 | 11.5 – 15.5 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 13.5 – 17.5 | 16.0 – 19.0 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 18.0 – 24.0 | 22.0 – 26.0 | |
| NDC-T | Φ2.0 x 4.0 | 2.5 – 5.0 | 3.5 – 6.0 | |
| NDC-S | Φ3.0 x 7.0 | 8.0 – 11.0 | 10.0 – 12.5 | |
| NDC-M | Φ4.0 x 10 | 12.0 – 16.5 | 15.0 – 18.0 | |
| NDC-I | Φ6.0 x 12.0 | 20.0 – 26.0 | 24.0 – 28.5 | |
| NDC-L | Φ8.0 x 15.0 | 26.0 – 35.0 | 31.0 – 38.0 |
SM-1322-L (20-30 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 1.0 – 2.0 | 2.5 – 3.0 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 5.0 – 6.5 | 7.5 – 8.0 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 7.5 – 10.5 | 10.5 – 11.5 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 11.0 – 13.5 | 14.5 – 16.0 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 15.0 – 18.0 | 19.0 – 22.0 | |
| NDC-T | Φ2.0 x 4.0 | 1.5 – 2.5 | 3.0 – 3.5 | |
| NDC-S | Φ3.0 x 7.0 | 6.0 – 8.0 | 8.5 – 10.0 | |
| NDC-M | Φ4.0 x 10 | 10.0 – 12.0 | 13.5 – 15.0 | |
| NDC-I | Φ6.0 x 12.0 | 17.0 – 20.0 | 21.0 – 24.0 | |
| NDC-L | Φ8.0 x 15.0 | 23.0 – 26.0 | 28.0 – 31.0 |
SM-1322-L (30-40 AT)
| Actuation Sketch | Magnet | Dimensions | Operate Distance | Release Distance |
|---|---|---|---|---|
|
||||
| NDR-T | 4.0 x 1.5 x 1.5 | 0.5 – 1.0 | 2.0 – 2.5 | |
| NDR-S | 6.0 x 2.5 x 2.5 | 4.0 – 5.0 | 6.0 – 7.5 | |
| NDR-M | 8.0 x 3.0 x 3.0 | 7.0 – 7.5 | 10.0 – 10.5 | |
| NDR-I | 12.0 x 3.5 x 3.5 | 10.0 – 11.0 | 14.0 – 14.5 | |
| NDR-L | 19.0 x 4.0 x 4.0 | 13.0 – 15.0 | 18.0 – 19.0 | |
| NDC-T | Φ2.0 x 4.0 | 1.0 – 1.5 | 3.0 – 3.5 | |
| NDC-S | Φ3.0 x 7.0 | 5.0 – 6.0 | 8.0 – 8.5 | |
| NDC-M | Φ4.0 x 10 | 8.5 – 10.0 | 12.5 – 13.5 | |
| NDC-I | Φ6.0 x 12.0 | 14.5 – 17.0 | 19.5 – 21.0 | |
| NDC-L | Φ8.0 x 15.0 | 20.0 – 23.0 | 26.0 – 28.0 |