Smart App
    HVAC/R world
    Newsletters
    Refrigeration technology

    Checking the refrigeration circuit

    Regular and accurate checking of the refrigeration circuit is an essential part of ensuring the safe and efficient operation of a refrigeration system. This ensures that all components are working properly and that there are no leaks, pressure drops or contaminants affecting the refrigerant circuit. This keeps the system running efficiently and optimizes energy consumption.

    View products

    The digital manifolds in use

    Thanks to the large colour display and wireless connection to the probes, all important parameters are visible at a glance. The 30-minute trend curves also ensure even more reliable analysis.

    With the testo 558s, the system density can be assessed easily and reliably, thanks to the clear visualization of pressure values and temperature compensation.

    The Testo starter kits

    testo Smart App

    One App for all applications

    The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems.

    Newly added:

    PRO measuring programs for increasing the efficiency of your applications

    Find out more

    Multifunctional

    Compatible with all Bluetooth-enabled Testo measuring instruments

    Efficient

    Direct report dispatch by e-mail

    Fast

    All measurement values at a glance

    Easy

    Intuitive measurement menus

    Smart

    Free download, free use

    NEW

    PRO measuring programs

    Other applications

    Vacuum gauges

    Find out more

    Evacuating/vacuum measurement

    Fully automatic evacuation and high-precision pressure measurement

    Refrigerant scales

    Find out more

    Charging

    Automatic and precise charging according to target value

    Electrical measuring instruments

    Find out more

    Electrical testing

    Safe testing of all electrical parameters of equipment and components

    Leak detectors

    Find out more

    Leakage testing/tightness test

    Reliable detection of the smallest leaks for all common refrigerants

    Thermometers

    Find out more

    Temperature measurement

    Flexible temperature measurement of components and ambient air

    All about refrigeration measuring technology

    No results found.

    What’s new?

    Measurement technology for heat pumps

    With a digital manifold, you carry out the commissioning and servicing of heat pumps quickly, flexibly and precisely. The intuitive touchscreen, the clear visualization of the readings and the Bluetooth connection to the probes and testo Smart App all make measurement and documentation easier.

    • Pressure and temperature testing

    • Controlled refrigerant service

    • Easy tightness testing and evacuation

    Find out more
    Practical guide

    Refrigeration knowledge in three modules

    Download the exclusive practical guide for free now.

    To download

    Understanding refrigeration systems

    Evaluating refrigerants

    Thermodynamics

    Main components of the compression refrigeration circuit

    Subcooling / Superheating

    And much more ...

    Check it out

    The new
    HVAC/R magazine is here!

    Find all the latest news, tools and trends: get our free HVAC/R magazine and find out everything about the big trends in industry. Benefit from exclusive professional tips, and gain fascinating insights into the testo Smart World.

    Go to download

    The top trends in the industry

    Special report: heat transition

    Exclusive professional tips

    Automation vision

    And lots more!