- Wide Measurement Range — Covers internal diameters from 2.0″ to 2.8″ (51 – 71 mm) with a single instrument.
- High Resolution — Displays measurements at 0.00005″ / 0.001 mm, enabling very fine measurement precision.
- Three-Point Contact Design — Self-centering carbide contact points ensure stable, repeatable readings and minimize measurement error.
INSIZE 3128-28 Digital Wide Range Three Points Internal Micrometer, 2-2.8"/51-71mm
by Insize
$1,215.00
INSIZE 3128-28 Digital Wide Range Three Points Internal Micrometer
Are you looking for a high-precision, digital, wide-range, three-point internal micrometer designed to measure internal diameters between 2.0″ and 2.8″ (51 – 71 mm)? The INSIZE 3128-28 Digital Wide Range Three Points Internal Micrometer is has a self-centering three-point contact design, this micrometer delivers consistent and repeatable measurements, eliminating common errors from two-point measurements. Rugged yet refined, it’s built with carbide measuring faces and rated to IP54, making it well suited for industrial environments where dust and splash resistance matters. Its digital readout, data output capabilities, and automatic power-off feature maximize usability and efficiency for metrology labs, machine shops, and quality control operations.
Key Features
- Wide Measurement Range — Covers internal diameters from 2.0″ to 2.8″ (51 – 71 mm) with a single instrument.
- High Resolution — Displays measurements at 0.00005″ / 0.001 mm, enabling very fine measurement precision.
- Three-Point Contact Design — Self-centering carbide contact points ensure stable, repeatable readings and minimize measurement error.
- Rugged & Protective — IP54-rated for dust and splash water resistance, suitable for workshop or light industrial settings.
- User-Friendly Controls — Buttons allow for On/Off, Set, Inch/mm toggle, and ABS/INC mode for flexible operation.
- Digital Data Output — Enables measurement data to be sent via data output port for SPC or further analysis.
- Automatic Power-Off — Conserves battery life by shutting down after a period of inactivity.
- Durable Construction — Carbide measuring faces for long life, ratchet stop mechanism for consistent contact force.
- Included Accessories — Comes with extension rods, a 2″ setting ring, and a spare LR44 battery for immediate use.
Specifications
| Model | 3128-28 |
| Measuring Range | 2.0″ – 2.8″ / 51 – 71 mm |
| Resolution | 0.00005″ / 0.001 mm |
| Accuracy | ±0.00020″ (per manufacturer) |
| Contact Material | Carbide measuring faces |
| Load Mechanism | Ratchet stop for uniform force |
| Protection Rating | IP54 (dust-proof, splash-proof) |
| Battery | LR44 (supplied) |
| Display | LCD digital readout |
| Data Output | Yes (cabled) |
| Functions | ABS/INC, inch/mm conversion, set, on/off |
| Standards | Meets DIN 863-4 (per spec sheet) |
Items Included
- Main digital three-point internal micrometer
- 2″ diameter setting ring
- 6″ / ~150 mm extension rod
- LR44 battery
- Inspection certificate / calibration report (traceable)
- Plastic storage / carrying case (per standard kit)
Insize 3128-28 Digital Wide Range Three Points Internal Micrometer Manual