Please log in here to access all benefits, including multibuy discounts and faster checkouts.

0-100mm Digital Outside Micrometer Set - 3109 Series
| Range (mm) | 0-100 |
| Range (Inch) | 0-4 |
| No Measuring Heads | 4 |
| No Setting Rings | 2 |
| Read Out | Digital |
| mm or Inch | mm|inch |
Learn more about Klarna
The 0-100mm Digital Outside Micrometer Set from the 3109 Series delivers precise outside measurements with a clear digital readout, making it ideal for machinists, inspectors, and workshop professionals who value speed and reliability.
- Measuring range: 0–100 mm outside measurement, designed for everyday machining and inspection tasks in tight spaces.
- Resolution: 0.001 mm (0.00005 in) for quick, repeatable readings with fine detail where it matters.
- Carbide measuring faces: hard-wearing faces that resist wear and maintain accuracy over time on a variety of materials.
- Unit conversion: convenient mm/inch button to switch display units without re-zeroing, streamlining mixed-unit workflows.
- ABS/INC and setup: supports Absolute and Incremental measurement modes with a dedicated set function for flexible use in different measurement scenarios.
- Power and battery: LR44 battery with automatic power-off to extend battery life between uses and reduce downtime.
- Included standards: Supplied with setting standards to facilitate fast, on-site calibration and verification.
With its digital readout, this micrometer minimizes parallax errors and speeds up calibration checks. The carbide faces provide durable, long-lasting performance on hardened workpieces, while the metric/imperial conversion and ABS/INC modes adapt to a wide range of measurement tasks. The compact case keeps the 0-100mm Digital Outside Micrometer Set organized for the shop floor or fieldwork, ready to deliver accurate measurements when precision matters most.
| Range (mm) | 0-100 |
| Range (Inch) | 0-4 |
| No Measuring Heads | 4 |
| No Setting Rings | 2 |
| Read Out | Digital |
| mm or Inch | mm|inch |
| Data Output | No |
| Individual or Set | Set |
| Graduation | 0.001mm/0.00005 |
| Set Includes | 3109-25A 3109-50A 3109-75A 3019-100A |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Digital Outside Micrometers Set - 3109 Series
View full collection →You are viewing 3109-1004A. Click any other SKU to view its full details.
| Product SKU | Range (mm) | Range (Inch) | Price | Stock | Order |
|---|---|---|---|---|---|
| 3109-753A | 0-75 | 0-3 | £273.39 | 4-5 days | |
| 3109-1004A Viewing | 0-100 | 0-4 | £385.04 | 4-5 days | |
| 3109-1506A | 0-150 | 0-6 | £659.48 | 4-5 days |
No products match your filters.


