Power up your world
Embrace efficiency – with the smart networked HVAC/R world of Testo
Discover the HVAC/R world of Testo
Heating technology
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Refrigeration technology
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Ventilation & IAQ
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Thermal imaging
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Welcome to the Smart World of Testo
The HVAC/R industry is under pressure. New technologies are making measurement tasks more complex than ever. Skilled workers are in short supply. And customer expectations are higher than ever. But with the testo Smart World, you’re ready to meet all these challenges efficiently.
Our tools cover every measurement task you face – whether in heating, refrigeration, thermal imaging or air conditioning. Together with the testo Smart App, they form a seamless system that helps you work faster, reduce errors and stay efficient every step of the way.
Free of charge, full of value.
Our latest HVAC/R magazine gives you insight into the most important technological trends in the industry – and the tools you need to stay ready for change. You’ll also find expert tips and real-world examples that help you work more efficiently with testo instruments.
Trend topics
Insights and inspiration from the latest issue of our HVAC/R Magazine – from smarter tools to digital workflows and the future of climate control.
Work smarter, not harder
Digitalisation is changing the HVAC/R industry from the ground up. But which apps and tools truly make life easier for installers? Find the answers in our latest issue.
Home, smart home
From zoning and predictive maintenance to app-controlled systems – discover in our new magazine how smart homes are reshaping the role of HVAC/R professionals.
Improve your workflow
Checklists, hands-on guides and case studies show how Testo tools support your daily routines. Discover new ways to measure, document and stay efficient.
Let all your tools
speak the same language
Managing your measurement data has never been more efficient. With our testo Smart App, you can centralise all data from any Bluetooth®-enabled Testo instrument. Say goodbye to time-consuming paperwork and step into a new era of end-to-end connectivity, wireless measurements and instant data visibility.
HEATING TECHNOLOGY
Put the future in your toolbox
Accurate measurements are key to reliable heating systems and satisfied customers. With the smart instruments from Testo, you work faster, document more easily and keep full control – whether it's a gas boiler, heat pump or hybrid system.
Smart tools. Smart Engineers.
More efficiency in flue gas analysis
The testo 300 is the ideal option if you want to upgrade your flue gas analysis.
Measure multiple parameters at once, document instantly and move on without delay. The testo 300 helps you save valuable time on every flue gas analysis – wireless, accurate and effortless.
Parallel measurements made easy
Second screen function for better visibility
Smooth data integration
Fast documentation via the testo Smart App
Quick Tip:
For an even faster start, choose one of the ready-to-use kits featured below.
Find your perfect match
From essential equipment to fully equipped kits – the testo 300+ kits offer the right solution for every requirement and every level of experience.
Kit 1
testo 300+ Standard Kit
This kit equips you for all essential measurement tasks on heating systems.
Kit 2
testo 300+ Advanced Kit
With built-in printer and essential accessories – ideal for standard heating systems and fast documentation.
Kit 3
testo 300+ Smart Kit
Extended kit for flexible use – including additional probes for more complex flue gas analysis.
Kit 4
testo 300+ Ultra Smart Kit
Designed for heavy-duty use – with long-life sensors, practical accessories and on-site printout.
Flue gas analysis
made easy
The testo 310 (2nd Gen) is the compact entry-level analyser with a customisable display, ideal for basic measurements and efficient digital documentation. Straightforward, reliable and ready to go.
Measure more. In less time.
Parallel measurements help you work faster and more efficiently – especially when multiple values need to be recorded at once.
Fast & easy
testo 115i – clamp thermometer
Perfect for flow and return temperature checks on heating systems.
Versatile & flexible
testo 915i – thermometer with interchangeable probes
Versatile thermometer with a wide probe selection and Bluetooth connection.
Intelligent & handy
testo 510i – differential pressure measuring instrument
Perfect for gas boilers, air flow velocity and volume flow.
Smarter workflows
for heating professionals
Parallel measurements, second screen function or customer profiles – the testo Smart App offers valuable features for every HVAC/R expert. Our checklist highlights what’s new and how to use each function efficiently.
Heating insights you can put to work
Parallel measurement with the testo 300+
Discover how easy parallel measurement with the testo 300+ is.
How Testo develops
its own sensors
Since 2015, we have been equipping our flue gas tools with sensors developed and produced in-house. Find out why we chose to become independent from external suppliers, how we develop our sensors, what innovations they contain – and what that means for your daily work as an HVAC/R professional.
Ready for heat pumps
Heat pump professional kit
The testo 558s offers intuitive operation thanks to its touchscreen, clear measurement graphs on a large colour display and wireless connection to the entire refrigeration portfolio.
Intuitive app feel in your manifold
Trend curves of readings over a 30-minute period
A3 and A2L compatibility for maximum safety
The right tools make the difference
Especially when installing modern heat pump systems. These helpers from testo bring more control and less effort to every step.
Digital refrigerant scale
testo 560i
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Vacuum pump
testo 565i
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Clamp meter with Bluetooth
testo 770-3
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Wireless vacuum probe
testo 552i
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Gas leak detector
testo 316-3
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THERMAL IMAGING
See more. Act faster.
No other tool is as versatile as a thermal imager. From heating and cooling systems to building diagnostics and maintenance – thermal imagers from Testo reveal what the eye can’t see. They help you spot faults early, prevent energy loss and keep systems running reliably and efficiently.
Thermal imaging – useful across many applications
Heating systems: Inspect radiators and pipework efficiently
Leak detection: Quickly locate hidden leaks in buildings
Refrigeration and air conditioning: Check insulation and measure temperature differences
Building diagnostics: Detect leaks, thermal bridges, moisture damage and mould risk
Electrical and mechanical systems: Spot hotspots and thermal irregularities early
Whatever the application, Testo has the right thermal imager for the job.
Made for fast spot checks
The new wireless testo 860i thermal imager for smartphones
The testo 860i makes thermography faster, easier and more efficient. It enables quick and simple Delta T measurements and delivers crystal-clear thermal images thanks to its high infrared resolution. Additionally, the testo Smart App supports you with practical measurement programmes:
DeltaHeat: Identify flow and return temperature differences in seconds
DeltaCool: Step-by-step guidance for checking cooling performance
Humidity: Assess mould risk with an intuitive traffic light system
Perfect for
beginners and all-rounders
The testo 872s make thermal imaging simple and efficient. This model offers high image quality, comes in a sturdy case with a replaceable battery, and is ready to use straight away – fully compatible with the testo Thermography App and made in Germany.
testo 872(s)
Higher resolution with 320 x 240 pixels, Integrated laser marker and compatible with App – perfect for demanding applications.
testo 872(s)
Higher resolution with 320 x 240 pixels, Integrated laser marker and compatible with App – perfect for demanding applications.
Thermography in practice
Whether you're new to thermal imaging or want to dive deeper – these free resources offer practical tips and real-world examples.
Practical guide: Thermography for heating contractors
Real-world applications, expert insights and step-by-step instructions.
Pocket guide: Thermography
Compact and practical – with essential basics, key concepts and what to watch out for when working with thermal images.
REFRIGERATION TECHNOLOGY
Fully intuitive. Fully connected. Fully efficient.
The vision of a connected HVAC/R world that makes your job easier? It’s already reality. With decades of field experience, we’ve created a refrigeration portfolio that lets you complete every task faster, smarter and with less effort.
testo 558s
The most efficient manifold in the market
With smartphone-level usability and clear measurement visualizations, your everyday work just got a lot easier. Fully connected to your refrigeration tools and designed for seamless wireless workflows.
App-style operation with clear measurement graphics
Touchscreen, keypad or app control – you choose
Wireless connection to all relevant instruments
Compatible with A2L and A3 refrigerants
The whole job in a single box
Designed for both newcomers and experienced professionals – with these Testo kits, you're ready for every refrigeration job. All tools perfectly matched. All tasks covered.
NEW
testo 558s Smart Vacuum Kit
Smart professional kit with wireless temperature and vacuum probes – ideal for high-precision standard measurements.
NEW
testo 558s Smart Vacuum Kit with charging hoses
Professional kit with digital manifold, wireless probes and robust charging hoses – ready for efficient commissioning and servicing.
NEW
testo 558s Smart Vacuum Kit with clamp meter
Smart professional kit with wireless vacuum, clamp temperature probes, high-precision current clamp and a refrigerant scale for full flexibility.
Testo insider
Insights from the experts behind the technology
It’s so intuitive – just like using a smartphone. That’s not something I’ve experienced with other manifolds. It has a great selection of refrigerants and a brilliant feature that shows system pressures as a clear graph. Truly a fantastic bit of kit.
Chloe Jennings
Delta T Refrigeration
Perfect match
for the testo 558s
These probes and the clamp meter complete your setup – automatically connected via Bluetooth to your manifold and the testo Smart App for even more efficient measurement, control and documentation.
Wireless vacuum probe
testo 552i
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Clamp thermometer
testo 115i
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High pressure probe
testo 549i
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Thermohygrometer
testo 605i
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Thermometer
testo 915i
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Clamp meter
testo 770-3
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Fully automated charging and evacuation
Let our technology work for you and automate your processes — with the auto-stop function for charging and evacuation.
testo 565i (7 CFM)
Compact vacuum pump with automatic stop function and self-starting vacuum hold test.
testo 565i (10 CFM)
High-performance vacuum pump with automatic stop function and self-starting vacuum hold test.
testo 560i with intelligent valve
Digital refrigerant scale with automatic stop function and automatic charging based on superheat, subcooling or weight.
Knowledge that works on site
Practical guide: Refrigeration systems
Everything you need to know for accurate measurement on refrigeration systems – clear, compact and free of charge.
Checklist: Servicing heat pumps and air conditioning systems
Step-by-step checklist for safe and efficient maintenance – ideal for daily use on site.
VENTILATION AND INDOOR AIR QUALITY TECHNOLOGY
Breathe easy and measure smart
Climate systems are becoming more complex – but your tools don’t have to. With testo, you measure faster, document smarter and keep every indoor environment under control.
testo 440
Small on size. Big on impact.
One device. Countless applications. The compact testo 440 makes it easy to measure all climate-related parameters – quickly, precisely and without complication. With intuitive menus, wireless Bluetooth® probes and a wide range of accessories, it’s built to simplify your daily work.
Intuitive measurement menus for fast, error-free operation
Wide probe selection for maximum flexibility
Wireless Bluetooth® probes for easy handling in any environment
Unbeatably versatile
One tool, many jobs – these kits and probes make the testo 440 even more flexible and efficient.
testo 440 Comfort kit
Perfect for measuring indoor air quality and thermal comfort – ideal for offices, public buildings and living spaces.
testo 440 Airflow kit
Tailored for duct and outlet measurements – with high-precision probes for quick, reliable air velocity and volume flow readings.
testo 400 + Universal Probes
Master every airflow
When precision matters, the testo 400 delivers. From flow rates to comfort levels, this high-end platform is built for complex HVAC/R applications – accurate, intuitive and fully compatible with the universal probes.
Detailed flow and comfort measurements in one device
Smart probe recognition and guided measurement menus
Ideal for standards-compliant indoor air quality assessments
Professional reporting directly on site
Nothing works faster
The measuring instruments of the Compact Class deliver precise results wherever you need them – fast, flexible, easy to use and fully connected to your smartphone.
Compact vane anemometer
testo 417
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Temperature measuring instrument
testo 922
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Digital differential pressure measuring instrument
testo 512-1
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CO2 measuring instrument
testo 535
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New in the testo Smart App:
Multi-Site Measurement
Track, document and manage measurements from different locations in one place – wherever you are.
Keep data clearly organised by site
Avoid mix-ups between systems and buildings
Save time and stay focused on the job
The instructive
testo 440 brochure
Everything you need to get the most out of your testo 440 – all in one place.
All news, all tools, all trends: in the HVAC/R magazine.
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