The Fieldpiece MG44 Wireless Vacuum Gauge marks a pivotal advancement in HVAC/R service instrumentation.
With a remarkable wireless range of up to 1,000 feet (305 meters) and engineered with industry-leading precision, the MG44 is built to elevate field efficiency, ensure accuracy, and meet the rigorous demands of professional technicians.
Designed to overcome traditional vacuum measurement limitations, it integrates seamlessly with digital tool ecosystems while maintaining Fieldpiece’s legacy of durability and performance.
Technical Specifications & Performance Excellence
The MG44 is engineered to meet the highest professional standards, delivering accurate and consistent vacuum measurements under real-world conditions. Its combination of broad-range capability and high-precision performance makes it an essential instrument for critical HVAC/R tasks.
Unparalleled Measurement Capabilities
The MG44 delivers a 50 to 25,000 micron range (6 to 3,333 Pascals, 0.06 to 33.33 mBar, or 0.05 to 25 Torr), supporting applications from deep vacuum evacuation to system troubleshooting. Its ±(5% + 5 microns) accuracy within the 50–2,000 micron range ensures absolute confidence during critical phases like moisture removal and vacuum verification.
Cutting-Edge Sensor Engineering
Central to the MG44’s performance is its Pirani thermal conductivity sensor—a superior alternative to conventional thermistors. Capable of withstanding pressures up to 870 psig (60 bar), it delivers stable, reliable readings even under demanding conditions without sensor damage.
Design for Real-World Durability
Built for resilience, the MG44 thrives in the harsh and unpredictable environments HVAC technicians frequently encounter. From extreme temperatures to accidental impacts, this tool is made to withstand the rigors of fieldwork without compromising performance.
Rugged Build & Environmental Tolerance
Certified with an IP54 rating, the MG44 resists dust ingress and water splashes, making it suitable for environments ranging from humid kitchens to dusty rooftops. It operates between 14°F to 122°F (-10°C to 50°C), and stores safely from -4°F to 140°F (-20°C to 60°C), ensuring performance in any climate.
Impact-Resistant & Ergonomic
An over-molded housing enhances shock resistance while providing an anti-slip grip. Coupled with a compact, lightweight frame (14.4 oz) and a reversible angled coupler, it allows effortless access in confined service areas.
Smart Wireless Integration
Beyond its robust hardware, the MG44 shines through its intelligent wireless capabilities. Its seamless integration with modern HVAC/R digital tools significantly enhances operational efficiency and technician mobility.
Long-Range BLE Connectivity
Utilizing Bluetooth Low Energy (2.4 GHz), the MG44 achieves industry-best wireless reach—up to 1,000 feet in optimal conditions. It integrates with the Job Link® System App and SMAN® digital manifolds, offering technicians a fully unified platform for real-time vacuum monitoring, system analytics, and automated report generation.
Remote Monitoring & Task Efficiency
Technicians benefit from remote oversight capabilities, receiving alerts when target vacuums are met and documenting evacuation trends—all while focusing on other tasks. This multitasking support significantly boosts productivity.
User-Centric Features
Every aspect of the MG44’s user interface is tailored to support technician workflows. From its clear, backlit display to intuitive controls, it minimizes friction and maximizes usability—even in the most challenging environments.
Advanced Display & Controls
The MG44 features a large dot-matrix backlit LCD that maintains visibility in both bright sunlight and dark basements. Technicians can toggle between display modes like bar graph, rate, and rate meter, depending on the task.
Fast Refresh & Glove-Friendly Navigation
Its 0.5-second refresh rate provides near-instant feedback, critical for leak detection and final system verification. Large buttons and intuitive navigation support quick adjustments—even with gloves.
Power Efficiency
Running on two AA batteries, it delivers up to 50 hours of operation. An adjustable auto shut-off function conserves power without interrupting connected monitoring sessions.
Field-Tested Versatility
This vacuum gauge proves its value across a broad range of HVAC/R applications. Whether servicing residential systems or large commercial units, the MG44 adapts to the job with reliability and flexibility.
Broad HVAC/R Application Suitability
From new system installations to routine maintenance and leak diagnostics, the MG44 shines in every role. It’s compatible with:
- Residential air conditioning systems
- Commercial refrigeration
- Transport cooling systems
- VRF installations
- Legacy and A2L refrigerant systems
Leak Detection Mastery
With advanced vacuum decay monitoring, the MG44 detects even micro leaks that pressure testing might miss. This ensures system integrity before refrigerant charging, reducing callbacks and improving long-term performance.
Return on Investment (ROI) & Value Proposition
The MG44 represents more than just a purchase—it’s a strategic investment. By saving technician time, preventing callbacks, and supporting data-driven service documentation, it offers exceptional long-term value.
Financial & Operational Impact
At $255.85, the MG44 balances affordability and premium performance. Key financial benefits include:
- Labor savings from remote monitoring (15–30 minutes saved per job)
- Reduced callbacks due to precise leak detection
- Improved documentation for warranty claims and customer transparency
Longevity & Support
With a 1-year warranty and proven field durability (5+ years in service), the MG44 outlasts many alternatives. Fewer replacements and calibrations contribute to a lower total cost of ownership.
Why the MG44 Stands Out
Compared to similar gauges on the market, the MG44 combines premium performance with field-proven durability and digital intelligence. It sets a new standard for what professionals can expect from their tools.
Competitive Advantages Over Alternatives
- 2x wireless range over competitors
- Superior impact resistance
- Job Link® ecosystem integration
- Advanced display clarity
- Exceptional pressure tolerance
Together, these factors justify its position as a premium, professional-grade tool.
An Indispensable Asset for Serious HVAC Pros
The Fieldpiece MG44 transforms vacuum measurement from a tedious manual task into a streamlined, precise, and smart process. For professionals committed to quality, efficiency, and dependability, it’s a game-changing addition to the toolkit.
Whether you’re a technician looking to speed up workflows, a contractor aiming to reduce callbacks, or a service manager standardizing best practices, the MG44 delivers measurable advantages that pay for themselves many times over.
