Reed sensors in Emergency lamp holders
Emergency lamps are rechargeable battery powered lamp that automatically turn on when there is a mains power outage. With the worlds real estate in cities shrinking, buildings are also getting to be designed with very less daylight and such lamps are always present in corridors and other common areas. Some of these lamps are portable and can be pulled off their charging sockets for more mobility and this is where reed sensors are useful.
Reed Sensors are used in such emergency lamp holders to trigger a signal that the lamp should be turned on or start the charging circuit when the lamp is placed back. The lamp itself is built with a small magnet, and a Normally Closed reed sensor is mounted on the holder. As long as the lamp is in its holder, the lamp stays off and the charging continues. Taking the lamp off of the holder, actuates the reed sensors and triggers the buzzer circuit and placing it back, trigger the charging circuit. The sensor’s signal is also used to protect the portable battery from over charging, thereby improving battery life.
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.
R5B Ultra-miniature Normally Closed SMD Reed Sensor
|Polarity Sensitive, Normally Closed (NC), 6.5mm body length. 5W switching capability at 0.35 A...Continue reading|
R2B, Normally Closed, SMD Reed Sensor
|Polarity Sensitive, Normally Closed (NC), 19.5 mm SMD and low-profile SMD pitch. 10W switching...Continue reading|
MM-1018 Micro Miniature Reed Switch
|This is durable and reliable, Form A type 10.0 mm Micro Miniature reed switch...Continue reading|