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  • Topics
    • Heating & Combustion
    • Refrigeration & Heat Pumps
    • Ventilation & Indoor Air Quality
    • Thermal Imaging & Building Diagnostics
    • Food Safety & Cold Chain
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Home/Refrigeration & Heat Pumps

Refrigeration & Heat Pumps

Find refrigeration and heat pump measurement guides for service technicians using digital manifolds, pressure probes, pipe-temperature sensors, vacuum gauges and refrigerant scales. Learn how pressure and temperature readings relate to superheat, subcooling and system operating conditions.Browse explanations of evacuation and standing vacuum tests, charging by mass, temperature measurement on pipes, leak detection and the limitations of different instruments. Model-specific guides distinguish Testo Smart Probes, manifolds, scales and vacuum equipment rather than assuming all devices perform the same job. Work involving refrigerants, charged circuits and electrical components should follow the equipment manufacturer’s procedures and local requirements.

Refrigeration & Heat Pumps

testo 550s: How to Measure Superheat and Subcooling Step by Step

testo 550s: testo 550s is a two-way Bluetooth digital manifold with a large graphic display. The Smart App supports reports and refrigerant updates;.

Refrigeration & Heat Pumps

testo 557s: How to Measure Superheat and Subcooling with the Four-Valve Setup

testo 557s: testo 557s uses a four-way valve block rather than the two-way arrangement on the 550s. It supports refrigeration measurement programs and.

Refrigeration & Heat Pumps

testo 550i: How to Measure Superheat and Subcooling in the Smart App

testo 550i: testo 550i is a compact screenless two-way digital manifold controlled from the testo Smart App. The app is required for its readings and.

Refrigeration & Heat Pumps

testo 558s: How to Measure Superheat and Subcooling Correctly

testo 558s: testo 558s has a four-way valve block, a colour touchscreen and physical keys that can be used with gloves. The official page describes.

Refrigeration & Heat Pumps

testo 570s: How to Measure Superheat and Subcooling and Log Trends

testo 570s: testo 570s is a four-way smart manifold built for longer measurements. Testo describes intelligent anomaly analysis in the Smart App, large.

Refrigeration & Heat Pumps

testo 552i: How to Run a Refrigeration Vacuum and Decay Test

testo 552i: testo 552i is a wireless absolute-pressure micron gauge, not a refrigeration manifold or vacuum pump. Its official measuring range extends to.

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