HVAC Shop Blog

A manifold gauge set is the tool you reach for on every job. This guide compares Mastercool's digital and analog manifold options across 2-valve and 4-valve configurations, covering R32 compatibility, superheat and subcooling calculation, and which type suits your typical work and conditions best.

The Testo 115i is a wireless clamp thermometer built for HVAC/R technicians who need fast, reliable pipe temperature readings without holding a probe in place. Purpose-built for superheat and subcooling calculations and refrigerant charging workflows, it connects via Bluetooth to the Testo Smart App so both hands stay free for gauges and service valves. This guide covers who should use it, how to get accurate readings, and where it fits in your toolkit.

Surface temperature measurement runs through almost every aspect of HVAC/R service work — from refrigerant charging and compressor diagnostics to coil performance checks and motor overheating detection. Getting it right means using the correct probe type at the right location, with proper contact and insulation. This guide maps the main surface measurement tasks to the probes and techniques that deliver accurate, reliable results in the field.

Tired of mismatched hoses, missing clamps, and messy readings on site? This guide breaks down the testo gauge accessories Aussie techs rely on most, including Testo clamp probes, filling hoses, the Testo Smart App, and 560i scale integration—so you can work faster, charge with confidence, and finish with clean job reports.

Sick of chasing shaky readings on split systems? This guide breaks down the Testo 550 series in plain Aussie terms, including the 550s Smart and 550i app-controlled options. You’ll learn when a 2-way manifold is the smarter pick, how wireless workflows save time on Brisbane humidity days and Sydney coastal calls, and when it’s worth stepping up to a 557-style setup. Built for Aussie conditions, focused on faster diagnosis, cleaner reporting, and fewer call-backs.

Testo 557 is the digital manifold Aussie techs trust when they’re done guessing. It gives you stable pressure readings, fast superheat and subcooling calculations, and a workflow that feels calm on real jobs. Whether you’re dealing with Brisbane humidity, Sydney coastal salt, Melbourne cold snaps, Darwin tropics, or Perth heat, the 557 helps you diagnose faster and prove your results. In this guide, you’ll see how the 557 compares to the 557s, how to connect Bluetooth cleanly, how to use the vacuum probe properly (including a rise test), and how the Testo Smart App supports tidy reporting for compliance-style handovers.

Go wireless with the Testo 115i clamp thermometer. Faster, safer pipe temps, live graphs and easy PDFs—built for Aussie rooftops.