Metro M3 air gauging system

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The Metro M3 for 2 air gauges (13040) is a compact, high-performance air gauging unit designed for precision measurement in demanding industrial environments. When paired with the optional stand, it transforms into a versatile, self-contained solution ideal for both lab and shop-floor applications. Compatible with all the air gauge brands available.

Key features

High-Resolution Measurement: The M3 delivers accurate, repeatable results for dimensional inspection using air gauging technology.
Plug-and-Play Setup: With its intuitive interface and optional stand, the M3 is easy to integrate into existing workflows — no complex configuration required.
Robust Build: Engineered for durability, the M3 withstands harsh conditions while maintaining measurement integrity.
Flexible Display Options: View results directly on the unit or connect to external systems for data logging and analysis.

Optional Stand Benefits:

Stable Platform: Provides a secure base for consistent measurements, especially in high-throughput environments.
Ergonomic Design: Improves operator comfort and reduces setup time.
Integrated Air Supply Management: Keeps tubing and connections tidy and efficient.

Compatibility:

The Metro M1 & M3 is available in models compatible with Mahr / Federal air gauging tooling, making it easy to upgrade or replace existing systems without changing your current air plugs or rings. This ensures seamless integration into legacy setups while benefiting from modern electronics and improved usability. Replacement for the BOWERS AIR1 & AIR2.

Applications:

Bore diameter and taper inspection
Part sorting and quality control
Inline or offline dimensional verification

Whether you’re upgrading an existing air gauging setup or starting fresh, the Metro M3 + stand offers a reliable, scalable solution for precision measurement.

Part Number	Product
13040	M3 for 2 Air Gages (requires 2x ACS-PNE-037 or -038)
13040-MF-H**	M3 for 1 Air Gage Mahr/Federal compatible (1-master) High Amplifier
13040-MF-L***	M3 for 1 Air Gage Mahr/Federal compatible (1-master) Low Amplifier
ACS-PNE-003	Air preparation for air gage (including filter and 2 regulators)
ACS-PNE-004*	Precision air preparation set for air gage with air saving function * requires a MB-RO module + cable 45186-1,5
ACS-PNE-005	T pneumatic fitting 8-8-6mm (push in type)
ACS-PNE-006	Soft PU tube dia 6mm ext, the meter
ACS-PNE-007	Soft PU tube dia 8mm ext, the meter
ACS-PNE-008	Y pneumatic fitting 8-8-6mm (push in type)
ACS-PNE-009	Stopper diam 8mm
ACS-PNE-010	Soft PU tube dia 3mm ext, the meter
ACS-PNE-011	Baionet adapter for Mercer air gages
ACS-PNE-015	Straight pneumatic reduction 8 to 6mm (push in type)
ACS-PNE-025	Restrictor with stansard size beetween 0,3 and 0,9mm (each 0,1mm)
ACS-PNE-026	Restrictor with special size >0,9mm
45186-1,5	Connecting cable from MB-RO to air saving unit or regulator for probes
ACS-PNE-024	Stand for 1 or 2 air gauges, fixation for display, modules and regulator.
ACS-PNE-027	Stand for max 3 air gages, fixation for display, modules and regulator
ACS-PNE-030	Stand for max 4 air gages, fixation for display, modules and regulator
ACS-PNE-032	Stand for max 5 air gages, fixation for display, modules and regulator
ACS-PNE-037	Set of brass restrictors diam. 0.3 to 0.9mm every 0.1mm + O’ring
ACS-PNE-038	fitting set for integrated restrictor air gage
ACS-PNE-026	Non-standard restrictor (diameter over 0.9mm)

** The H(High) versions are a replacement solution for Mahr/Federal amplifiers type D-10000, D-16000, D-20000, D-32000, EAG-33XXX, EAG-34XXX .

***The L(Low) versions are a replacement solution for Mahr/Federal amplifiers type D-2500, D-4000, D-5000, D-8000, EAG-31XXX , EAG-32XXX

User friendly interface

Compatible with all air gauge brands

Multiple measurement display modes

Graphical interface

Measurements can be displayed with different types of barographs and needle indicators for ease of use.

USB connection

The mini-USB provides power to the M3 and allows for measurement transmission

Many functions and measurement mode can be selected through the keyboard:

1 or 2 measurement configuration (2 characteristic only on M3)
Calibration in 2 or 3 points
Resolution up to 0.01µm
Filtering function for a very high measurement stability not depending on the air gage.
Different display modes with or without tolerances: analogue (needle indicator), digital
Tolerance limits and control limits (Warnings).
Absolute or relative measurement
Direct or dynamic measurement (Min, Max, Max-Min , Average, Median)
USB communication “virtual keyboard”
USB Stick connection for data export (CSV file)
Modbus-RTU or ASCII Communication on RS232
Sorting by classes of size, up to 16 classes by characteristic, with useful coloured indicator.
Possibility to connect up to 4 optionnal I/O module with 8 optocoupled I/O (= max 32 I/O)
Possibility to connect a multi-function footswitch (measurement transfert, calibration etc…)
Alarm with temperature variation (option)
Temperature compensation (option)
Configuration possible by a QR code
Easy to use and reliable

The M3 is equipped with a mini-USB connector with 2 functions
1. Power supply via a supplied wall transformer.
2. Measurement transmission: When the M3 is connected in USB to a PC, it is detected as a keyboard with the standard drivers of your operating system (Windows, MacOS, Linux…). When you transfer measurements from the M3, they appear on your computer screen as if they had been entered on the keyboard. No need to install any specific driver or software.

Advantages of this feature:

No risk of error when entering values
Saves time
Works everywhere on all software: Excel, SAP, Word….
No need for a driver, interface software or computer knowledge: you just plug in the display and you can work

Catalogue

Manual