Lamp Holders Use Normally Closed Reed Sensors

Emergency lamps, essential for providing illumination during power outages, are battery-powered devices designed to automatically activate when mains power fails. Modern buildings are increasingly constructed with limited natural light, necessitating the presence of emergency lighting in corridors and common areas. Some of these lamp holders offer portability, allowing users to detach the lamp from their charging sockets for enhanced mobility, a feature facilitated by the integration of normally closed reed sensors.

In emergency lamp holders, reed sensors play a role in initiating actions such as activating the lamp or starting the charging circuit upon reattachment. A small magnet is embedded within the lamp itself, while a Normally Closed reed sensor is positioned on the holder. While the lamp is docked, the reed sensor remains inactive, allowing the lamp to remain off while continuing its charging process.

When the lamp is removed from the lamp holder, the reed sensor is triggered, activating the buzzer circuit to signal its disconnection. Conversely, reattaching the lamp to its holder triggers the reed sensor once more, prompting the initiation of the charging cycle. Moreover, the signal generated by the sensor serves to safeguard the portable battery against overcharging, thereby prolonging its operational lifespan.

By leveraging the functionality of reed sensors within emergency lamp systems, users benefit from efficient and intuitive operation. These sensors not only facilitate seamless transitions between charging and usage modes but also contribute to the preservation of battery health, ensuring reliable performance during critical situations.

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

Some special field applications, for the sake of circuit logic, security concerns, or a power saving necessity, require a sensing signal Continue reading ->

Nov 17, 2024

Recommended Products

The Reed Switches and Sensors used in such normally closed 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.