CT Buyer's Guide Version

Discover how to select the right CT in this updated edition

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This comprehensive guide will assist you in determining the most suitable CT scanner for your facility by addressing three pivotal questions that are crucial in the decision-making process:

1. What key features should I prioritize for my next CT scanner?

2. What will be the overall cost associated with acquiring this CT scanner?

3. What criteria should I consider when selecting the right vendor for purchase?

Understanding Barcode Basics

Scannable barcodes generally fall into two categories: one-dimensional (1D) and two-dimensional (2D) barcodes. One-dimensional barcodes were the first to be widely utilized, containing a limited data capacity, yet they remain prevalent in many applications today. On the other hand, two-dimensional barcodes can store significantly more information and provide broader functional possibilities as compared to their linear counterparts.

One-Dimensional Scanners Explained

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Linear or one-dimensional (1D) barcodes have a rich history, having been in use for many decades. These barcodes typically contain a maximum of 25 characters, with variation depending on the specific type. To read these codes, 1D laser scanners were designed to illuminate the barcode and interpret the information based on the reflection received.

The Functionality of 2D Scanners

In contrast, two-dimensional barcodes can accommodate around 2,000 characters as they read information both horizontally and vertically. Known as area imagers, 2D barcode scanners capture an image of the barcode, optimizing it for contrast, and then decoding the resulting image to extract the embedded information. Importantly, 2D barcode scanners can process both 2D and 1D barcode formats with efficiency.

Advantages of 1D Laser Scanners

The operation of 1D laser barcode scanners revolves around reflecting light off the barcode and capturing the reflected data. These scanners are relatively economical but exhibit limitations, such as a scanning range of only 2-24 inches and increased difficulty in decoding damaged barcodes.

Understanding 1D Linear Imagers

Employing CCD technology akin to digital cameras, 1D linear imagers utilize a plethora of light sensors to capture and convert images into digestible data. This mechanism allows them to read even poorly printed or damaged barcodes from distances of two feet or more, enhancing their versatility.

Exploring 2D Area Imagers

2D area imagers offer a heightened level of detail and data intelligence. They have the capacity to scan any barcode type—be it 1D, stacked, 2D, QR codes, and more—from various orientations and at distances exceeding three feet. This efficiency minimizes scanning labor and broadens application potential. Additionally, they can extract information from barcodes displayed on screens or monitors. With their superior performance, 2D area imagers are an intelligent option for those seeking reliable long-term scanning solutions.

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