Choosing the Right Document Scanner
Choosing a document scanner depends on what you will scan, how much you will scan, and the quality you need. Understanding the key differences between scanner types and specifications helps match the right scanner to your actual use case.
Flatbed vs Sheet-Feed Scanners
Flatbed scanners have a glass platen for placing individual pages, books, photos, and fragile documents. Sheet-feed scanners use an automatic document feeder to process multiple pages in rapid sequence. Some models combine both. Flatbed is better for photos and bound materials; sheet-feed is better for high-volume document batches.
Scanner Resolution (DPI)
Scanner resolution is measured in dots per inch (DPI). For standard document scanning, 300 DPI produces clear, readable text suitable for archiving and OCR. For photo scanning, 600 DPI or higher captures more detail. For film and slide scanning, 2400 DPI or higher is typically needed.
Scanning Speed
Sheet-feed scanner speed is measured in pages per minute (ppm) and images per minute (ipm). For offices with high-volume scanning, a scanner rated at 30+ ppm significantly reduces the time required to process large document batches compared to slower models.
Connectivity Options
USB connectivity is standard on most scanners for direct computer connection. Network scanners connect via Ethernet or Wi-Fi, allowing multiple users to share a single scanner. Some scanners can scan directly to email, network folders, or cloud services without a computer connection.
Key Points
- Flatbed for photos, books, and fragile originals; sheet-feed for high-volume document batches
- 300 DPI is sufficient for most document scanning; 600+ DPI for photos
- Scanning speed (ppm) matters significantly for high-volume office use
- Network connectivity enables shared scanning in multi-user environments
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