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

100-125mm 4-5" IP65 Waterproof/Dustproof Digital Outside Micrometer - 3108 Series (Insize)
| Range (mm) | 100-125 |
| Range (Inch) | 4-5 |
| Setting Ring | 75mm (included) |
| Extension Rod | 150mm |
Learn more about Klarna
Description
The 100-125 mm / 4-5" IP65 Waterproof/Dustproof Digital Outside Micrometer from Insize (3108 Series) delivers fast, precise measurements in challenging environments. With a clear digital readout and 0.001 mm resolution, it’s ideal for engineers, machinists, technicians, and quality professionals who work around fluids, coolants, and dust. Built for reliability on the shop floor or in the field, this micrometer combines rugged protection with accurate, repeatable results.
- IP65 sealing for wet, dusty environments: The rugged housing protects the measurement system from dust and water, minimizing downtime and extending tool life in coolant areas, washdowns, and harsh job sites.
- 0.001 mm digital resolution: See precise readings instantly on the digital display, with convenient ABS/INC operation to suit metric or imperial workflows and reduce guesswork.
- Carbide measuring faces with spherical anvil and included setting standards: Durable, wear-resistant contact ensures long-term accuracy; the spherical anvil accommodates curved surfaces, and the included setting standards (except 0-25 mm) speed up quick, repeatable setups.
This micrometer helps you speed up measurements, cut downtime, and improve part consistency by delivering dependable readings in demanding conditions. Its combination of robust IP65 protection, fine 0.001 mm resolution, and durable carbide contact supports reliable performance across prototypes, routine inspections, and production runs.
Part Numbers
- Protool Part Number
- 3108-125A
- Brand
- Insize
- Category
- Measuring Tool
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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: IP65 Waterproof/Dustproof Digital Outside Micrometers - 3108 Series (Insize)
View full collection →You are viewing 3108-125A. Click any other SKU to view its full details.
| Product SKU | Range (mm) | Range (Inch) | Accuracy | Price | Stock | Order |
|---|---|---|---|---|---|---|
| 3108-25A | 0-25 | 0-1 | ±0.002mm | £96.42 | 4-5 days | |
| 3108-50A | 25-50 | 1-2 | ±0.002mm | £123.13 | 4-5 days | |
| 3108-75A | 50-75 | 2-3 | ±0.003mm | £149.22 | 4-5 days | |
| 3108-100A | 75-100 | 3-4 | ±0.003mm | £163.83 | 4-5 days | |
| 3108-150A | 125-150 | 5-6 | ±0.003mm | £197.22 | 4-5 days | |
| 3108-125A Viewing | 100-125 | 4-5 | ±0.003mm | £185.74 | 4-5 days | |
| 3108-175A | 150-175 | 6-7 | ±0.004mm | £214.96 | 4-5 days | |
| 3108-200A | 175-200 | 7-8 | ±0.004mm | £235.83 | 4-5 days |
No products match your filters.


