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- The HVAC/R world of Testo
Be Sure – with Testo. Improve your IAQ tools
Enter Now! Win Big!
One lucky winner will receive a Testo 400 Comfort Kit valued at $4,425. Giveaway ends on December 31st.
Testo Launch Week 2026
A New Era of Testo Diagnostics
Explore the next generation of Testo tools
built for faster, smarter diagnostics!
Enhance Your Tools & Team
Your New Analyzer Comes with More Than Advanced Technology
Unlock training designed to help you get the most from your Testo 310, 320, or 330, and earn a FREE Testo 510i Differential Pressure Manometer Smart Probe.
Be Sure – with Testo. Improve your IAQ tools
Enter Now! Win Big!
One lucky winner will receive a Testo 400 Comfort Kit valued at $4,425. Giveaway ends on December 31st.
Testo Launch Week 2026
A New Era of Testo Diagnostics
Explore the next generation of Testo tools
built for faster, smarter diagnostics!
Heating technology
Measurement solutions for heating technology
Refrigeration technology
Measurement solutions for refrigeration technology
IAQ & Ventilation technology
Measurement solutions for air conditioning and ventilation technology
Thermograhpy for Building Inspection
High-quality images and professional reports ensure an ideal set up for building inspections
Thermography for HVAC/R
Smart and intuitive thermography - ideal for quick spot checks and leak detection
Monitoring
Testo ensures you the effortless climate monitoring
Your service partner for validation, qualification, and mapping: Testo Industrial Services
Testo Industrial Services is your leading service provider for quality assurance and expertise in validation, qualification and mapping.
More service and more security for your company.
Testo Industrial Services supports you in monitoring and ensuring uniform environmental conditions in your warehouse or transport system. From individual temperature distribution measurements or metrological testing to project coordination and conceptual design of complex projects.
One app.
For all applications.
The testo Smart App brings everything together to make completing tasks even easier: End-to-end connectivity, wireless measurements and all data at a glance. Download now free of charge!
SMART
Automatic Bluetooth pairing
BASIC
All measured values centralized
PRACTICAL
Easy documentation
FLEXIBLE
Second screen function, remote control and live measurement data
NEW
Digital upgrades