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

Reed sensors in Central Locking of Cars with Remote Keys

Reed switches in door sensors
Automobile Key

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.

Application Classification

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.

Magnet Biasing Type

Reed switches in seat belt locking system Some special field applications, for the sake of circuit logic, or security concerns, require...Continue reading ->

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

Standard Size Reed Sensor Omni polar, normally open (NO), 19.5 mm SMD and low-profile SMD pitch, 10 W...Continue reading ->

MS-105 Miniature PCB Mountable Reed Sensor

Miniature pcb mountable This micro miniature PCB mountable reed sensor is designed for switching 10W. The sensors...Continue reading ->

MS-106 Reduced Miniature PCB Mountable Reed Sensor

Reduced miniature pcb reed sensor Omni polar, normally open (NO), epoxy encapsulated, 15.2 mm PCB mountable pin pitch, capable...Continue reading ->

MS-108 Standard Size PCB Mountable Reed Sensor

Standard size pcb mountable reed sensor Omni polar, normally open (NO), epoxy encapsulated, 17.7 mm PCB mountable pin pitch, capable...Continue reading ->