Reed sensors in Central Locking of Cars with Remote Keys
Central locking allows the driver or front passenger to simultaneously lock or unlock all the doors of an automobile. This is achieved by a secure coded radio frequency signal sent from an electronic key which has already been paired with the microprocessor. The key code is compared with on-board computer which then sends a signal to the central locking system. Although these doors are mostly controlled by the remote key, for manual opening of the doors, reed sensors are used. The sensors are mounted on the doors, and magnets are mounted beneath the door handles. If the handle is lifted, the reed sensor detects this and sends a signal to the computer to open the doors. An added advantage is that the same reed sensors can be used as security devices to trigger alarms when the door is opened in an unlocked condition.
Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.
The Reed Switches and Sensors used in such applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.
R2 Standard size SMD Reed Sensor
R2-S Gull-wing SMD Formed Reed SensorR2-S Gull-wing SMD Formed Reed Sensor Pad LayoutR2-F Low Profile SMD Formed Reed SensorR2-F Low
Dec 2, 2020
MS-105 Miniature PCB Mountable Reed Sensor
Drawing of MS-105 Reed SensorDrawing of MS-105 PCB Pad Layout starFeatures10W Contact Rating. 12.7 mm PCB Pitch. Normally Open
Oct 30, 2020
MS-106 Reduced Miniature PCB Mountable Reed Sensor
Drawing of MS-106 Reed SensorDrawing of MS-106 Reed Sensor Pad Layout starFeatures10W Contact Rating. 15.2 mm PCB Pitch. Normally
Dec 2, 2020