Designed & Made in the USA Since 1983
👉 This Product Replaces the Mini Mobile Module M3 (MC-MM-M3)
The MC-MM-M3-EVO is the direct successor to the retired MC-MM-M3. All existing M3 and M3E gage connectors and RM2.4 Base Receivers are fully compatible with the MC-MM-M3-EVO — no other changes to your MobileCollect setup are required.
If ordering via purchase order, please update your part number from MC-MM-M3 to MC-MM-M3-EVO before submitting.
The MobileCollect Mini Mobile Module EVO (M3E) is the next generation of MicroRidge’s most compact wireless gage transmitter. It attaches directly to your handheld digital gage and sends measurement data to a MobileCollect Base Receiver — and from there into any PC application or SPC software. The true cost of manual measurement data entry in a production environment is well documented: transcription errors, operator fatigue, and lost throughput. The M3E eliminates all three at the source.
Introduced May 4, 2026 as the direct successor to the Mini Mobile Module M3, the M3E delivers 800,000+ readings on a single CR2032 — a significant improvement over the already industry-leading M3, including nearly 6x the battery life in Continuous Read Mode — and introduces OpenGage Mode, a new gage type that extends RM2.4 industrial wireless connectivity to any 3V UART device beyond traditional digital gages. Built on a new, faster chipset architected for future capability expansion. Compatible with over 3,500 gage devices across 30+ connector options, and fully backward compatible with all existing M3 gage connectors and RM2.4 Base Receivers.
Note: A gage connector is not included. Order the appropriate connector separately using the MobileCollect Selection Tool.
Compatible Gages – 3,500+ devices
Wireless Range – Up to 140 ft
Battery Life – 800,000+ readings or 3-5 years (CR2032)
Read Modes –  Single, Continuous, TIR
Dimensions / Weight – 1.70″ × 1.17″ × 0.59″ / 0.7 oz
Certifications – FCC (ID: 2ACNQB1), IC (12298A-B1), CE, RoHS2, REACH
Gage Connector –  Sold separately — 30+ options
Origin – Designed & Made in the USA
$285.00
The Mini Mobile Module EVO (M3E) is a battery-powered wireless transmitter that mounts directly onto a handheld gage. When the operator presses the Read button, the M3E captures the current measurement from the connected gage, transmits it wirelessly over MicroRidge’s RM2.4 protocol to a paired MobileCollect Base Receiver, and the Base forwards that data to the connected PC — appearing in whatever application is running, from Excel to SPC software to a LIMS.
No manual data entry. No tethered cables. No separate data logger. The entire process from button press to data capture takes under a second. For quality engineers managing measurement data at scale, the M3E is a direct control on a known source of nonconformance risk: human transcription error.
As part of the broader MobileCollect system, the M3E functions as a key input device in measurement-driven manufacturing automation — feeding real-time dimensional data directly into SPC, MES, or ERP workflows without operator intervention.
The M3E delivers 800,000+ readings on a single standard CR2032 coin cell — up from 500,000+ on the original M3 — raising the already industry-leading battery life to a new standard. The M3E powers on when the Read button is pressed and shuts off automatically after transmitting each reading, eliminating idle drain.
The most significant improvement is in Continuous Read Mode. The original M3 was rated at approximately 140,000 readings in continuous operation due to the sustained power draw of interval-based capture. The M3E delivers 800,000+ readings in Continuous Read Mode as well — a nearly 6x improvement that significantly reduces battery replacement as a routine maintenance item for the vast majority of continuous-capture deployments.
M3 (Retired) | M3E | |
|---|---|---|
Standard Read Mode | 500,000+ readings | 800,000+ readings |
Continuous Read Mode | ~140,000 readings | 800,000+ readings (~6x) |
Battery Type | CR2032 | CR2032 |
Operational Life | 3–5 years | 3–5 years |
Battery chemistry and form factor are unchanged — standard CR2032, universally available, no proprietary cells required. When battery voltage approaches end-of-life, the M3E provides an unambiguous low-battery warning: the Gage Read LED blinks red 6 times following a successful reading.
OpenGage Mode is a new selectable operating mode introduced with the M3E. Built on a low-power UART implementation developed by MicroRidge, it enables any device that communicates at 3V UART to transmit data wirelessly over the RM2.4 industrial wireless network — the same proven protocol that powers the entire MobileCollect product line.
Where the original Mini Mobile Module M3 was purpose-built for digital gages with SPC/Digimatic outputs, OpenGage Mode removes that constraint. Torque gauges, environmental sensors, Arduino and ESP32-based custom test fixtures, UART-output load cells, barcode readers, and end-of-line test systems can now access RM2.4’s industrial wireless infrastructure — with no custom RF hardware design required.
If it speaks 3V UART, it speaks RM2.4.
For quality and embedded controls engineers building custom measurement infrastructure, OpenGage Mode delivers RM2.4’s 32-bit encrypted transmission, 140-foot industrial range, and noise resilience in the 2.4 GHz ISM band from virtually any microcontroller-based measurement device. OpenGage Mode is configured via the Xpress Setup Program or Extended Setup Program and is included on every MC-MM-M3-EVO at no additional cost. For full wiring diagrams, data packet timing, and code examples, see the OpenGage Mode Feature Guide.
Accurate, auditable measurement data is a foundational requirement under ISO 9001, IATF 16949, AS9100, and 21 CFR Part 820. Each of those standards places explicit controls on measurement system reliability, data integrity, and the elimination of transcription error as a nonconformance source. The M3E directly supports those requirements by automating the transfer of gage measurement data from the point of collection to the host application — eliminating manual entry as a process step and the transcription errors, omissions, and illegibility issues that accompany it. The two-LED confirmation feedback on every reading provides the operator with immediate verification that data was both acquired from the gage and received by the Base, creating a closed-loop collection process auditors can observe and document.
The M3E supports digital gages — instruments that output measurement data via a proprietary data and clock signal. This covers the most common output type found on handheld calipers, micrometers, and digital indicators across all major metrology brands.
Supported brands include Brown & Sharpe, CDI, Fowler, Insize, LMI, Mahr Federal, Mitutoyo, Ono Sokki, Starrett, Sylvac, and others with compatible outputs. Use the MobileCollect Selection Tool to identify the correct gage connector for your specific instrument model.
For non-standard devices and custom sensors, see OpenGage Mode above.
MobileCollect products communicate over MicroRidge’s proprietary RM2.4 protocol, operating in the 2.4 GHz ISM band with 32-bit encryption on all transmissions. RM2.4 was engineered specifically for factory floor measurement data collection — prioritizing data integrity, RF noise resilience, and coexistence with other 2.4 GHz traffic in industrial environments. If you’ve evaluated wireless gage systems before and encountered dropped readings, interference issues, or range limitations, those failure modes are well characterized — and they’re largely why Bluetooth falls short in manufacturing environments where MobileCollect is successfully deployed.
Pairing is transmitter-driven: when an M3E is paired with a Base, it stores that Base’s unique network identifiers and includes them in every wireless packet it transmits. The Base processes data packets only from transmitters sending the correct matching identifiers, ignoring all others. In a facility running multiple MobileCollect systems simultaneously, this architecture ensures measurement data is routed precisely to the correct Base with no cross-contamination between systems. Any MicroRidge hardware bearing the RM2.4 logo is compatible with any other RM2.4-capable device, regardless of product generation.
The M3E has two bi-color LEDs on its face, visible along the top edge when the module is mounted on a caliper or indicator in the recommended orientation:
Gage Read LED — Flashes red (~150 ms) when a measurement is successfully obtained from the gage. Two red blinks indicate the gage read failed.
Host Accept LED — Flashes green (~150 ms) when the MobileCollect Base confirms receipt of the transmitted measurement. Five blinks indicate the Base did not acknowledge the transmission.
This two-LED confirmation loop gives the operator discrete, unambiguous feedback for both sides of every data transaction — gage acquisition and wireless receipt — without requiring the operator to look at a screen. In a production environment where operators may be wearing gloves or working at pace, that matters. Additional LED codes covering diagnostics, pairing status, low battery, and firmware update mode are documented in the MobileCollect Hardware User’s Guide.
The M3E supports four read modes configurable via the Xpress or Extended Setup Program:
Single — One reading per button press. Factory default.
Continuous — Readings taken at a defined interval without repeated button presses. Used in applications requiring sustained data capture. Rated at 800,000+ readings on a single CR2032 — nearly 6x the previous generation.
TIR (Total Indicator Runout) — Captures minimum, maximum, and TIR value across a measurement sweep. Used in runout and flatness inspection applications.
The M3E attaches to the back of a caliper or the body of a digital indicator using the included Dual Lock adhesive strips — a heavy-duty, repositionable fastening system. When mounted in the recommended orientation on a caliper, the LEDs remain visible along the top edge, and both the battery and gage connector remain accessible without removing the module from the instrument.
At 1.70″ × 1.17″ × 0.59″ and 0.7 oz, the M3E maintains the same compact profile as the original M3 — less than half the volume of the Command or RS-232 Mobile Modules.
The M3E uses a user-replaceable internal gage connector that interfaces the module with the gage’s data port via an 8-pin male connection. Over 30 connector options are available in lengths up to 72 inches, specific to the gage brand and output type. All existing M3 gage connectors (MC-M3-XXXXX series) are fully compatible with the M3E — no new connectors are required if transitioning from an M3. New 8-pin M3E (MC-M3E-XXXXX series) connectors are also fully compatible with the original Mini Mobile Module M3 — compatibility runs both directions across generations. See the Mini Mobile Module EVO Connector Compatibility Guide for a full breakdown of connector types, pin configurations, and compatibility across both transmitter generations.
Unlike the Command Mobile Module, the M3E does not automatically detect the connector type — if you replace a connector for a different gage output type, you must use the Xpress or Extended Setup Program to specify the new gage type.
Connector replacement requires removing four Phillips screws, observing standard ESD precautions, and swapping the connector. The connector has a small orientation tab that must face upward during installation. Gage connectors are not included with the M3E and must be ordered separately.
Before the M3E can transmit to a Base, it must be paired with it. Three pairing methods are available:
Pair-on-the-Fly — No software required. Uses the module’s Setup and Read buttons in conjunction with the Base’s Reset button.
Xpress Setup Program — Windows-based utility covering features required by most M3E users: pairing, read mode configuration, continuous read, TIR, gage type, and module labeling.Â
Extended Setup Program — Full-featured Windows utility for multi-transmitter systems and advanced configurations.
Important: We strongly recommend updating both MobileCollect Xpress Setup and MobileCollect Extended Setup to the latest version before setting up the Mini Mobile Module M3E. Outdated versions of either program may cause setup issues.
M3E firmware is field-upgradeable via MicroRidge’s firmware update utility, downloadable from the MobileCollect firmware updates page. The update utility is designed to prevent incorrect firmware from being loaded into any MobileCollect device. The update process involves placing the M3E into Firmware Update Mode via a specific Setup/Read button sequence and completing the upload within the firmware update utility.
The M3E is compatible with all MobileCollect Base Receivers. The following models are recommended for most deployments:
MicroBase EVO USB-A — Dongle-sized EVO Base that plugs directly into a USB-A port. Supports both USB Serial and Keyboard Wedge output modes. Ideal for mobile or tablet-based data collection setups.
MicroBase EVO USB-C — USB-C variant of the EVO MicroBase with the same Serial and Keyboard Wedge output capability. Compatible with modern laptops, tablets, and mobile devices.
EVO Wedge Base — Desktop Base Receiver with selectable USB Serial and USB Keyboard Wedge output. Outputs data as keystrokes directly into any active application — Excel, web-based SPC, Power BI, and others — without additional software. Recommended for stationary workstation deployments.
EVO RS-232 Base — Desktop Base Receiver with both USB Serial and DB9 RS-232 output ports. Well-suited for PLC-controlled systems and applications requiring native RS-232 connectivity.
The M3E covers the majority of handheld digital gage applications and is the recommended starting point for most deployments. All MobileCollect transmitters can be paired to a single Base Receiver simultaneously, meaning any combination of the transmitters below can operate together as part of the same data collection system.
Command Mobile Module — Use when your application requires the Base or host software to remotely trigger readings rather than the operator pressing a Read button. Supports the same digital gages as the M3E with the addition of wireless read commands, standby modes, and multi-module orchestration from a single Base.
RS-232 V2 Mobile Module — Use when your RS-232 gage application requires mobility. The RS-232 Mobile Module is the battery-powered transmitter for handheld or portable RS-232 instruments where a wired connection to the measurement system is not practical.
Digital Remote — Use when your digital gage is stationary rather than handheld and your application requires the same remote read automation capability as the Command Mobile Module. The Digital Remote is a desktop transmitter powered by USB — no battery required — and is the appropriate choice for fixed measurement stations where mobility is not needed.
RS-232 Remote — Use when your stationary measurement device outputs RS-232 data and your application requires remote read automation capability. Supports automatic baud rate detection and is suited for bench-top or fixture-mounted serial devices at a fixed workstation.
Does the Mini Mobile Module EVO include a gage connector?
— No. The gage connector is sold separately and is specific to your gage brand and model. Use the MobileCollect Selection Tool to identify the correct connector for your instrument. All existing M3 connectors (MC-M3-xxx series) are compatible with the M3E.
What gages are compatible with the M3E?
— The M3E supports over 3,500 digital gage devices across all major metrology brands including Mitutoyo, Starrett, Mahr Federal, Fowler, Brown & Sharpe, CDI, Insize, LMI, Ono Sokki, Sylvac, and others with compatible outputs. Additionally, OpenGage Mode enables any 3V UART device to connect to the RM2.4 network. Use the MobileCollect Selection Tool to confirm compatibility for your specific instrument model.
What is OpenGage Mode?
— OpenGage Mode is a new selectable operating mode on the M3E that enables any device communicating at 3V UART — Arduino, ESP32, custom sensors, torque gauges, environmental sensors, EOL test fixtures — to transmit wirelessly over the RM2.4 industrial network. It is configured via the Xpress or Extended Setup Program and is included on every M3E at no additional cost.
How long does the battery last?
— Battery life is rated at 800,000+ readings on a single CR2032 coin cell — up from 500,000+ on the original M3. In Continuous Read Mode, the M3E delivers 800,000+ readings as well, compared to approximately 140,000 on the M3 — nearly a 6x improvement. The M3E provides a low-battery warning — 6 red LED blinks after a reading — when replacement is needed.
Does the M3E require a power switch?
— No. The M3E powers on when the Read button is pressed and shuts off automatically after each reading. There is no power switch and no idle power drain.
Can the Base trigger a reading remotely on the M3E?
— No. The M3E requires the operator to press its Read button to initiate a reading. If your application requires the Base or host software to wirelessly trigger readings, the Command Mobile Module supports that functionality.
What wireless protocol does the M3E use, and why not Bluetooth?
— The M3E uses MicroRidge’s proprietary RM2.4 protocol operating in the 2.4 GHz ISM band with 32-bit encryption. RM2.4 was designed specifically for industrial measurement environments. For a detailed technical comparison, see Why Bluetooth Fails in Manufacturing.
How far can the M3E transmit?
— Up to 140 feet (40 meters) line-of-sight indoors. Real-world range depends on obstructions between the M3E and the Base. Metal machinery, walls, and personnel in the RF path will reduce effective range. Position the Base elevated and with clear line-of-sight to transmitters for best results.
Is the gage connector replaceable in the field?
— Yes. Remove four Phillips screws, observe ESD precautions, and swap the connector. All existing 6-pin M3 connectors are compatible with the M3-EVO, and all new 8-pin M3-EVO connectors are compatible with the original M3. Compatibility runs both directions. If the replacement connector is for a different gage output type than the previous one, reconfigure the gage type in the Xpress or Extended Setup Program before taking measurements.
What read modes does the M3E support?
— Single (one reading per button press, factory default), Continuous (sustained interval-based capture, 800,000+ readings in this mode), and TIR (Total Indicator Runout — min/max/TIR across a sweep). Continuous, and TIR are configured via the Xpress or Extended Setup Program.
Does the M3E support ISO 9001, IATF 16949, AS9100, or 21 CFR Part 820 measurement data collection requirements?
— The M3E directly supports the measurement data integrity requirements common to these standards by eliminating manual transcription as a process step. Automated gage data collection removes a documented source of measurement error and nonconformance risk, and the M3E’s two-LED per-reading confirmation provides operator-observable verification that data was acquired from the gage and received by the Base. For MSA, SPC, and audit trail requirements, output formatting and data routing are defined through the MobileCollect Setup Programs to match the requirements of your host application.
What are the physical dimensions and weight?
— 1.70″ × 1.17″ × 0.59″, 0.7 oz. Same dimensions as the original M3, only slightly lighter.
Does the M3E encrypt its wireless transmissions?
— Yes. All RM2.4 transmissions use 32-bit encryption.
What are the operating environment limits?
— -4°F to 176°F (-20°C to 80°C), up to 90% relative humidity non-condensing.
Is the M3E compatible with my existing M3 gage connectors and Base Receivers?
— Yes. All existing M3 gage connectors (MC-M3-xxx series) and all RM2.4 Base Receivers — Legacy and EVO — are fully compatible with the M3E. No infrastructure changes are required when transitioning from the M3.
Do I need to update my setup software?
— Yes. We strongly recommend updating MobileCollect Xpress Setup and MobileCollect Extended Setup to the latest version before configuring the M3E. Outdated versions may cause setup issues.
Mini Mobile Module EVO (MC-MM-M3-EVO) Specs | |
|---|---|
Part Number | MC-MM-M3-EVO |
Replaces | MC-MM-M3 (retired May 4, 2026) |
Dimensions | 1.70″ × 1.17″ × 0.59″ |
Weight | 0.7 oz |
Wireless Protocol | MicroRidge RM2.4, 2.4 GHz ISM band (2.4000–2.4835 GHz) |
Encryption | 32-bit |
Wireless Range | Up to 140 ft (40 m), line-of-sight indoors |
Compatible Gages | 3,500+ devices (digital gage output); any 3V UART device via OpenGage Mode |
Transmitter Connection | 8-pin male, sold separately |
Gage Connector Options | 30+ options available; all existing 6-pin MC-M3-xxx connectors compatible with the M3E; all new 8-pin M3E connectors compatible with the original M3 |
Read Modes | Single, Continuous, TIR |
Battery | CR2032 lithium coin cell, 3V |
Battery Life – Standard Single Read Mode | 800,000+ readings |
Battery Life — Continuous Read Mode | 800,000+ readings (~6x improvement over M3) |
Buttons | Read + Setup; rated 1,000,000 cycles each |
LED Status Indicators | Gage Read (bi-color) + Host Accept (bi-color) |
Output Format | Defined by MobileCollect Setup Programs |
Firmware | Field-upgradeable |
Operating Temperature | -4°F to 176°F (-20°C to 80°C) |
Operating Humidity | ≤90% RH, non-condensing |
Certifications | FCC (ID: 2ACNQB1), IC (12298A-B1), CE, RoHS2, REACH |
Country of Origin | Designed & Made in the USA |
Base Receiver Compatibility | All MobileCollect RM2.4 Base Receiver models (Legacy and EVO) |
Gage Connector Included | No — order separately |
