12–20mm Digital Three-Point Internal Rapid Gauge, Rotating 330° Display, RB6 & Bluetooth, Supplied in Case - Metav IndustryLine

Combine fast, repeatable internal measurements with ±0.005 mm accuracy and Bluetooth data transfer to streamline quality control and reduce rework. Order the set directly via Metav Werkzeuge or consult our specialists for application advice.

Digital three-point internal quick measuring device M312.345 — 12–20 mm, Bluetooth-enabled (Metav IndustryLine)

The Digital three-point internal quick measuring device M312.345 is a pistol-style bore gauge designed for rapid, precise checks of internal diameters and blind holes in small to medium components.

• Precision ±0.005 mm accuracy
• 12–20 mm micro-range measurement
• Bluetooth and RB6 data output
• 330° rotatable display

Rapid internal checks that keep production moving

The M312.345 delivers fast, repeatable readings by means of its three-point contact measuring head and a dedicated quick-measure mechanism. With a measuring range of 12–20 mm the instrument sits in the micro range classification, making it particularly suitable for fine mechanical components and tight bores where stability and short jaw length reduce measurement error. The tangible benefit for production and inspection is fewer stops in the line: checks can be made in seconds, helping keep throughput high without sacrificing traceable precision.

Digital readout and dependable data transfer for SPC workflows

Data capture is simplified by a comprehensive digital display and multiple transfer options. The unit provides a full-featured display with ON/OFF/SET, CAL, INC, PRESET, HOLD, mm/inch and TOL functions for straightforward tolerance monitoring on the shop floor. Measurement values can be exported via RB6 or Bluetooth, enabling direct integration with SPC systems or handheld data loggers and eliminating transcription errors. This compatibility supports faster decision-making and smoother quality documentation.

Designed for workshop durability and ergonomic handling

The pistol-style instrument is built for frequent use: the 330° rotatable display ensures readability in confined setups, while the ergonomic grip aids single-hand operation when accessing blind or awkward holes. The set contains two instruments; the setting ring and any extension are not included. Power is supplied by a standard CR2032 battery for simple replacement on site. For safe transport the tools are supplied in a protective case, which keeps the gauges secure between jobs and during storage.

Practical accuracy and application-focused benefits

With an accuracy of ±0.005 mm, the device provides a significant step up from general-purpose internal gauges and supports precise control in finishing and assembly operations. The set is explicitly suitable for blind-hole measurement, where three-point probing gives a stable effective diameter reading even when a bore does not run through. Reduced measurement variation and digital logging together help lower scrap rates and improve first-pass yield, delivering clear operational savings over time.

Contact Metav Werkzeuge for tailored application advice or to secure the M312.345 set from our Emmerich stock — call +49 2822 7131930 or email info@metav-werkzeuge.com for fast technical guidance

Technical data

• Article number: M312.345
• GTIN: 4054469181677
• ECLASS: 21170335
• Label: Digital three-point internal quick measuring device, 12 - 20 mm
• Contents: 2x digital pistol three-point quick measuring instrument (setting ring and extension not included)

Core specifications

• Measuring range: 12–20 mm
• Sub ranges: 12–16 mm; 16–20 mm
• Accuracy: ±0.005 mm
• Weight: 1.71 kg
• Quantity per set: 2
• Battery: 3 V CR 2032

Features and compatibility

• Digital display with ON/OFF/SET, CAL, INC, PRESET, HOLD, mm/inch and TOL
• Data output: RB6 and Bluetooth
• 330° rotatable display
• Suitable for blind-hole measurement
• Delivered in protective case
• Set delivered without setting ring or extension
• Digital instrument

FAQ

What measurement range does this instrument cover?
The M312.345 covers a measuring range of 12–20 mm with sub ranges 12–16 mm and 16–20 mm.

How accurate are the readings from the gauge?
The digital three-point instrument provides accuracy of ±0.005 mm, suitable for high-precision internal diameter checks.

Can measurement data be exported to quality systems?
Yes. The device supports data output via RB6 and Bluetooth for direct transfer into SPC systems or data loggers.

Is the instrument suitable for blind-hole bores?
Yes. The M312.345 is explicitly designed for blind-hole measurement using a three-point probing method for stable readings.

What is included in the delivery and what is not?
The set includes two digital pistol three-point measuring instruments; a setting ring and extension are not included. The tools are supplied in a protective case.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com