250-550mm Internal Precision Depth Gauge Digital Readout, 0.001mm Resolution, ISO 17025 Calibrated - Microtech Metrology

Take advantage of ISO 17025 traceable calibration, a 250–550 mm measuring range and a fine 0.001 mm display resolution to secure consistent internal measurements on medium‑large components; order via Metav Werkzeuge or consult our experts for application advice.

Internal fine measuring instrument — digital internal gauge, 250–550 mm, Microtech Metrology

The Internal fine measuring instrument is a digital internal gauge designed for precise diameter and bore measurements in workshop and production environments, offering a wide working depth and a robust measuring span for medium‑format components.

• Digital readout 0.001 mm resolution
• Measuring range 250–550 mm
• Supplied calibrated to ISO 17025

Reliable measurement for medium‑large internal diameters

This instrument addresses the regular need to inspect medium‑sized bores with a measuring range of 250–550 mm, classifying it among long‑bar instruments where stiffness and repeatability matter. The combination of a substantial measuring depth (380 mm) and a guarded retractable measuring head reduces deflection and protects the probe during use, which in turn keeps measurement scatter low. With a display resolution of 0.001 mm, the readout supports fine decision making on tolerances, while the stated measurement accuracy of 0.025 mm defines the usable uncertainty for pass/fail assessments in everyday quality control.

Traceable calibration for audit‑ready inspection

Delivered fully calibrated to ISO 17025, this gauge includes a calibration certificate that documents measurement traceability and parameters. The certificate supports supplier audits and internal quality records, demonstrating that the device was adjusted and verified under accredited conditions. Understanding the difference between display resolution and measurement uncertainty is important: although the display shows 0.001 mm steps, the verified accuracy of 0.025 mm should be used when calculating measurement uncertainty for statistical process control or inspection plans.

High‑resolution digital readout for decisive verdicts

The clear digital readout simplifies reading small deviations and accelerates inspection cycles compared with analogue alternatives. Data clarity reduces interpretation errors and shortens handover time between operators. The digital format supports rapid comparison against nominal values and enables consistent documentation of results on inspection sheets. The instrument’s robust construction and precise mechanics mean repeatability across sequences of measurements, helping to prevent rework and maintain stable process capability.

Practical handling that fits the workshop workflow

Designed for ease of use, the retractable measuring head and ergonomic control layout make in‑field checks straightforward, even when access is limited. The unit is suited for routine quality checks, first‑off inspections and setup verification where medium‑scale internal dimensions must be confirmed quickly and reliably. Integration into existing measurement routines is straightforward — documentation from the supplied ISO 17025 calibration and the instrument’s clear specification help to harmonise results across shifts and locations, supporting a consistent quality culture on the shop floor.

For an inspection tool that combines accredited calibration and a practical 250–550 mm range, request the Microtech Metrology internal fine measuring instrument via Metav Werkzeuge — our Emmerich office will advise on suitability, delivery and integration with existing workflows.

Technical data

• Article number: 139550800
• GTIN: 4061905454240
• Manufacturer: Microtech Metrology

Facts

• Measuring range: 250–550 mm
• Measuring depth: 380 mm
• Display resolution: 0.001 mm
• Accuracy: 0.025 mm
• Digital: yes

Special features

• Supplied calibrated to ISO 17025; calibration certificate included
• Retractable measuring head for protected probe handling
• Category: Fine measuring instruments
• eClass: 21170310

FAQ

What measuring range does the Internal fine measuring instrument cover?
The Internal fine measuring instrument covers a 250–550 mm range, making it suitable for medium‑format bores and internal diameters in production environments.

Is the instrument supplied with an accredited calibration certificate?
Yes, the Internal fine measuring instrument from Microtech Metrology is delivered calibrated to ISO 17025 and includes a calibration certificate for traceability and audit purposes.

What resolution and accuracy can be expected from the device?
The display resolution is 0.001 mm while the validated measurement accuracy is 0.025 mm, figures that should be used for tolerance decisions and uncertainty budgets for the Microtech Metrology internal fine measuring instrument (SKU 139550800).

How deep can measurements be taken with this gauge?
The instrument supports a measuring depth of 380 mm, allowing inspection of recessed features and deeper bores without auxiliary extensions.

What workshop tasks is this instrument best suited to?
Designed for routine inspection, first‑article checks and setup verification, the Internal fine measuring instrument is ideal for quality control of medium‑sized components, fixtures and moulded parts where documented, repeatable internal measurements are required.

Manufacturer / Responsible: Microtech, Nizhneyurkovska str., 45a, 04080 Kyiv, Ukraine, tool@microtech.tools