Reed switches and Reed Sensors in Barcode Scanners
Barcode scanners in supermarkets can be clicked on to a docking system that is integrated with the check-out conveyor belt. This helps in automatic scanning and belt indexing. Once an item is scanned, the belt is indexed, until another item appears under the scanner.
During this automated scanning, some items may not be at the same level as the barcode scanner’s field of view and the scanner will need to be removed from the dock for manual scanning. When this is done, the controller will not index the belt, and will start indexing only after the scanner has been put back in its cradle or dock.
A reed switch on the dock and a magnet inside the scanner are used and whenever the scanner is removed from the dock to conduct a manual scan, the signal from the reed switch is used to ensure that the belt does not index. The information regarding which items require a manual scan is saved and used for further improvement of the check-out system.
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|
SM-1322 Sub Miniature Reed Switch
|The SM-1322 is a robust and reliable, Form A type 13.0 mm Sub Miniature...Continue reading|
MS-216 Standard size Cylindrical Sensor
|Diameter 6mm x 25 mm long, omni polar, switches loads of up to 10W,...Continue reading|