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.

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 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

Recommended Products

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

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

SM-1322 Sub Miniature Reed Switch

This Form A type SM-1322 Sub Miniature Reed Switch is built with a 2.25 mm diameter glass with a higher wall thickness for better glass to Continue reading -> Nov 8, 2022

MS-216 Standard size Cylindrical Sensor

MS-216 Magnet Sensor Drawing starFeatures10W Contact Rating. Normally Open contact. Three sensitivity bands. Sputtered Ruthenium Continue reading -> Oct 30, 2020

MO-1422 Miniature Off-Centre Contact Reed Switch

This MO-1422 Miniature Off-Centre Contact Form A type Reed Switch is designed for highly sensitive magnet applications when the Continue reading -> Dec 2, 2020