Vacuum Gauges for HVAC Pros – Accurate & Reliable

7 products

Deep vacuum is a number, not a guess.

Stop relying on a timer or the sound of your pump. Our range of digital Micron Gauges from Fieldpiece, Testo, and Mastercool gives you precise, real-time readings, ensuring your system is moisture-free and compliant with Australian standards (typically <500 microns).

Quick Guide: Which Gauge Style?

Feature Standard Digital Wireless / Smart
Best For Daily installs & simple repairs. Commissioning reports & commercial jobs.
Connectivity Screen Only App Connected (View on phone).
Reporting Visual check only Generates PDFs for clients/warranty.
Price Point Budget Friendly Investment

Micron Tips for Pros

  • Placement Matters: Never place the gauge directly on the pump. Connect it to a Core Removal Tool (CRT) on the system's service port to read the *actual* system vacuum.
  • The Target: Most manufacturers require a stable vacuum below 500 microns. If it rises rapidly after isolation, you have a leak or moisture.
  • Protection: Keep your sensor clean. Oil mist from the pump is the #1 killer of vacuum sensors. Clean regularly with isopropyl alcohol.

Complete your evacuation rig: Pair this with a high-CFM Vacuum Pump and Core Removal Tools for faster pull-downs.

Common Questions

1. Do I really need a micron gauge?

Yes. An analogue manifold gauge cannot read deep vacuum (microns). You need a dedicated digital gauge to confirm dehydration and prevent future compressor failure.

2. Where should I connect the gauge?

Connect it as far from the vacuum pump as possible (ideally on the system side). This ensures you are measuring the vacuum inside the unit, not just at the pump inlet.

3. What is a good vacuum reading?

A standard target is 500 microns or lower. Once reached, isolate the pump. If the reading holds stable (decay test), the system is dry and tight.

HVAC Shop Australia | Support: 0412 333 115
Note: Only licensed technicians should work on pressurised refrigerant circuits.

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