Mitutoyo 293-821-30 Digital Micrometer, Range 0-25mm

The Mitutoyo 293-821-30 is a digital outside micrometer with a 0–25 mm range and 0.001 mm resolution, part of Mitutoyo's Digimatic series. This is the digital upgrade to the classic 103 series — same legendary Mitutoyo build quality, but with a large LCD display that eliminates parallax reading errors and delivers three-decimal precision (0.001 mm) that analog micrometers cannot match.

Built to ISO 3611 and DIN 863 standards, the 293-821-30 features carbide-tipped measuring faces, a ratchet thimble for consistent measuring force, and SPC data output for connecting to external data collection systems. The digital display can be zeroed at any point, switched between metric and inch, and the origin point is maintained even after power-off — making it ideal for fast-paced production environments where speed and accuracy both matter.

✦ Key Features

0.001 mm Digital Resolution — Large, clear LCD display reads to three decimal places — ten times finer than analog micrometers, eliminating interpolation errors.

Carbide-Tipped Measuring Faces — Micro-lapped to 0.3 µm flatness for long service life and reliable full-face contact with hardened workpieces.

Ratchet Thimble — Consistent measuring force on every reading, removing operator-dependent variation.

Origin Set & Zero Anywhere — Set zero at any position for comparative measurements. The origin point is stored even when the display powers off.

SPC Data Output — Digimatic output port connects to Mitutoyo data processing units, printers, and SPC software for paperless quality documentation.

Inch/Metric Switching — Toggle between mm and inch readings at the press of a button — convenient for shops working with mixed-unit drawings.

📐 Technical Specifications

🏭 Applications

CNC Production QC — Fast, accurate shaft and feature measurement at the machine with 0.001 mm resolution — no need to interpret an analog scale under shop-floor lighting.

SPC & Data Collection — Connect to Mitutoyo data processors or USB interfaces for real-time statistical process control and paperless inspection records.

Incoming Inspection — Verify received components against drawing tolerances with digital precision and zero-setting for quick comparative measurement.

Tool & Die Making — Measure punch diameters, die features, and ground surfaces with 0.001 mm resolution for ultra-tight tolerances.

Calibration & Metrology — Use as a working standard in calibration labs where digital resolution and SPC traceability are required.

Why Buy from San Tools?

✅ Authorised Mitutoyo Distributor — Genuine product with full manufacturer warranty.

✅ In Stock in Dubai — Ships same-day from our Al Quoz warehouse.

✅ Calibration Certificates — Traceable certificates for ISO 9001 and IATF 16949 audits.

✅ Free UAE Delivery — On orders over AED 500.

✅ Expert Support — 38 years matching the right instrument to the right application.

Frequently Asked Questions

How does the 293-821-30 compare to the analog 103-137?
Both cover 0–25 mm with ±2 µm accuracy. The 293-821-30 adds a digital LCD display with 0.001 mm resolution (vs 0.01 mm on the analog), SPC data output, and inch/metric switching. Choose digital for production environments and SPC documentation; choose analog for simplicity and no batteries.

Does the digital display stay on?
The display auto-powers off after 20 minutes of inactivity to conserve battery. The origin point is stored and restored when you power back on.

Can I connect this to a computer?
Yes. The SPC Digimatic output connects to Mitutoyo USB Input Tools (IT-016U) or data processors for direct data transfer to Excel, SPC software, or quality management systems.

What battery does it use?
A standard SR44 silver oxide button cell, lasting approximately 2.4 years under normal use.