Seat Belt Sensor
Introduction
As we all know, seat belts are now used by all airlines and in almost all automotive vehicles with the possibility that they may become mandatory for buses and trains as well. In recent years the Reed Switch sensor has been discovered by safety belt designers as being perhaps the best and most reliable way to detect when a seat belt has been engaged...
Full application writeup: Seat Belt Sensor: Application Note
Features
- Ability to activate and control switching function from only one side of the buckle
- Designed for SPST (Form A) and SPDT (Form C) switching
- Designed to handle high shock environments
- Designed to operate in dirty environments
- Dynamically tested contacts
- Hermetically sealed
- Millions of reliable switching operations
- Reliable switching
| Series | Dimensions | Illustration | ||
|---|---|---|---|---|
| mm | inches | |||
| MK03 | Dia | 5.25 | 0.207 | ![]() |
| L | 25.5 | 1.004 | ||
| MK14 | Dia | 4.0 | 0.157 | ![]() |
| L | 25.5 | 1.004 | ||
| MK18 | Dia | 5.0 | 0.197 | ![]() |
| L | 17.0 | 0.669 | ||
| MK20/1 | Dia | 2.72 | 0.107 | ![]() |
| L | 10.0 | 0.394 | ||
| Series | Dimensions | Illustration | ||
|---|---|---|---|---|
| mm | inches | |||
| MK04 | W | 13.9 | 0.547 | ![]() |
| H | 5.9 | 0.232 | ||
| L | 23.0 | 0.906 | ||
| MK05 | W | 19.6 | 0.772 | ![]() |
| H | 6.1 | 0.240 | ||
| L | 23.2 | 0.913 | ||
| MK12 | W | 14.9 | 0.587 | ![]() |
| H | 6.9 | 0.272 | ||
| L | 32.0 | 1.260 | ||









