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 Hotel Security Card Readers

hotel card reader
Hotel Keycard Slot

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.

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.

Position sensing Type
Position sensing Position Sensing type application When an application requires the end position of a movement sensed, or the sensing of a part when it Continue reading ->

Feb 28, 2024

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 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 Continue reading ->

Dec 2, 2020

MS-212 Ultra-miniature Cylindrical Sensor
Ultra miniature cylindrical sensor icon MS-212 Magnet Sensor Drawing starFeatures10W Contact Rating. Normally Open contact. Two sensitivity bands. Sputtered Ruthenium Continue reading ->

Oct 30, 2020

MS-214 Miniature Cylindrical Sensor
Miniature cylindrical sensor icon Drawing of MS-214 Magnet Sensor starFeatures10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading ->

Oct 30, 2020

MS-225, M5 Threaded Cylindrical Sensor
M5 threaded cylindrical sensor MS-225 Threaded Magnet Sensor drawing starFeatures10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Continue reading ->

Nov 20, 2020