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275-300 11-12" IP65 Digital Outside Micrometer - 3101 Series (Insize)

SKU:3101-300A

The 275-300 11-12" IP65 Digital Outside Micrometer from Insize delivers quick, precise outside measurements in challenging environments. With IP65 waterproof sealing, it stands up to machine fluid... Read more ↓
Range (mm)275-300
Range (Inch)11-12
Setting Ring75mm (included)
Extension Rod150mm
l310.5
a19.4
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£457.98
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4–5 days estimated lead time — subject to availability
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The 275-300 11-12" IP65 Digital Outside Micrometer from Insize delivers quick, precise outside measurements in challenging environments. With IP65 waterproof sealing, it stands up to machine fluids, coolant spray, and dust—making it reliable for shop floors, production lines, and field service. It’s ideal for engineers, machinists, technicians, and quality inspectors who need fast, repeatable readings on parts up to 12 inches (300 mm).

Built on the 3101 platform, this micrometer combines carbide measuring faces for long wear life with a spherical anvil for stable, repeatable contact. The bright digital display offers 0.001 mm / 0.00005" resolution and supports mm/inch switching, on/off, zero, and data output. Powered by SR44/LR44 batteries, it includes calibration setting standards (except 0–25 mm / 0–1"). Optional accessories—foot switch for data transfer (7304-2) and data output cable (7302-SPC6)—enable seamless data logging. When used with data output, the measurement range extends up to 300 mm (12 in).

  • IP65 waterproof construction: Sealed protection against water, coolant spray, and dust so you can measure reliably next to machines without interruptions or cleanup.
  • High-precision digital readout: 0.001 mm / 0.00005" resolution with mm/inch switching, zero function, and data output for fast, accurate data capture.
  • Durable carbide faces with spherical anvil and ready calibration: Wear‑resistant measuring faces plus an included spherical anvil deliver repeatable results, and the included setting standards (except 0–25 mm / 0–1") speed up quick, reliable calibration.

This micrometer helps you streamline measurement workflows by delivering dependable, repeatable readings in demanding environments. The digital readout and data output capabilities simplify documentation and SPC workflows, reducing downtime and rework. With rugged construction and long wear life, you can trust consistent performance across multiple parts and batches.

Range (mm) 275-300
Range (Inch) 11-12
Setting Ring 75mm (included)
Extension Rod 150mm
l 310.5
a 19.4
No Measuring Heads 4
No Setting Rings 2
b 167.5
c 5.5
Accuracy ±0.006mm
Resolution 0.001mm/0.00005
Read Out Digital
IP Rating IP65
mm or Inch mm|inch
Data Output Yes
Individual or Set Individual

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.

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Staff are very helpful and interested in providing a good service making us the customer feel valued.
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honest about stock and prices are competitive.
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Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
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Full Range: IP65 Digital Outside Micrometers - 3101 Series (Insize)

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You are viewing 3101-300A. Click any other SKU to view its full details.

Product SKURange (mm)Range (Inch)AccuracyPriceStock Order
3101-25A 0-250-1±0.002mm£156.10 4-5 days
3101-50A 25-501-2±0.002mm£199.72 4-5 days
3101-75A 50-752-3±0.003mm£218.09 4-5 days
3101-100A 75-1003-4±0.003mm£243.34 4-5 days
3101-125A 100-1254-5±0.003mm£285.81 4-5 days
3101-150A 125-1505-6±0.003mm£297.29 4-5 days
3101-175A 150-1756-7±0.004mm£311.06 4-5 days
3101-200A 175-2007-8±0.004mm£337.46 4-5 days
3101-225A 200-2258-9±0.005mm£366.16 4-5 days
3101-275A 250-27510-11±0.006mm£412.07 4-5 days
3101-250A 225-2509-10±0.005mm£392.56 4-5 days
3101-300A Viewing275-30011-12±0.006mm£457.98 4-5 days