Reed Sensors in Hotel Security Card Readers
In most hotels, the most secure method to prevent unauthorized entry and allow only the guest to enter a room is by using a key-card pre-programmed by the hotel management.
For this, it makes sense to use readily available magnetic key-cards and readers with encrypted, hotel-programmable codes. Before the card reader can read the magnetic strip on the key-card, it needs to receive an indication that the card has been inserted fully. This is achieved with a small spring loaded lever having a tiny magnet which is pushed by the key-card when it is inserted fully into the slot. When the key-card is inserted and the magnet is pushed towards the sensor, the signal from the sensor is can be used to trigger the magnetic card reader which then accepts or rejects the card. When accepted, the controller can then trigger a solenoid or a motor that opens the lock. Hermetically sealed Reed Sensors are especially useful in areas like locks where there needs to be grease, lubrication and dust.
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
|Omni polar, normally open (NO), 19.5 mm SMD and low-profile SMD pitch, 10 W...Continue reading|
MS-212 Ultra-miniature Cylindrical Sensor
|Diameter 2.6 mm x 12 mm long, omni polar, switches loads of up to...Continue reading|
MS-214 Miniature Cylindrical Sensor
|Diameter 4 mm x 25 mm long, omni polar, switches loads of up to...Continue reading|