simplicity@optimum
Safe, precise, efficient:
Ensure reliable processes. Effortlessly comply with the strictest regulations. Achieve optimum performance for your systems.
With Testo – Partner of industry.
Welcome to the optimum solution
High-quality measuring instruments, tailor-made solutions and premium services to ensure optimal performance: Here at Testo, this is what we are all about. Are you a service technician, process engineer or facility manager? Find out here how we can provide you with efficient, flexible and expert support.
Tackle time and cost pressures, staffing and skills shortages with intuitive solutions.
Simplify your management of system diversity and plant complexity with flexible solutions.
Use the opportunities of digitalization, automate processes and increase efficiency.
Stay informed and ahead. Comply with the latest standards and regulations – for greater sustainability and energy efficiency.
Expertise for industry and technical facility management
Good climate.
Reliable processes
In industrial plants, offices and public buildings: Precise monitoring of the indoor climate is the key to stable processes and high energy efficiency. Whether fully automated with a cloud connection or as a stand-alone version for simple measuring tasks: Experience how Testo makes your climate monitoring smarter, more reliable and more efficient.
testo Smart App – everything, everywhere
Commissioning, measured values, push notifications and data analysis: With the testo Smart App you always have full control. (Note: Testo Data Monitoring license required)
testo Saveris Cloud – secure, in real time
The online data loggers connect seamlessly to the testo Saveris Cloud – the prerequisite for real-time climate monitoring. Deviations are detected immediately so that you can react in good time. (Note: Testo Data Monitoring license required)
testo 162 online data logger – for many measurement parameters
Maximum flexibility thanks to the integration of external sensors. The built-in display of the WiFi-enabled online data logger enables direct visual inspection on site.
testo 164 online data logger – for many measurement sites
Unobtrusive and independent, the online data logger integrates visually and functionally into its surroundings and can be linked to the testo 164 GW gateway at the touch of a button.
Maximum safety. Minimum effort.
Online data logger system
Climate monitoring almost by itself: The online data loggers connect to the testo Saveris Cloud – the prerequisite for real-time climate monitoring. Thanks to continuous data storage, automated documentation and alerts by push message or e-mail, you can detect deviations immediately and take action in good time. With the testo Smart App you always keep everything under control. (Note: Testo Data Monitoring license required)
The right logger for every application: Functionalities, measurement parameters and WiFi infrastructure.
Safe and compliant: The testo Saveris Cloud meets the highest safety standards and is certified in accordance with EN 12830.
Always and everywhere: Everything under control with the testo Smart App – from commissioning to data analysis.
How to find the right data logger
Whether mobile or stationary, with an app, PC software or cloud-based online monitoring system: Testo has the right solution for you.
Simply reliable.
Mini data loggers testo 174
Compact and efficient: Monitor temperature and humidity easily and cost-effectively – ideal for just a few measuring points.
Precise and flexible: Use the app connection or USB-C for quick and uncomplicated data evaluation.
Intuitive and license-free: Benefit from a secure and user-friendly application without additional license costs.
Functionalities at a glance:
Download the industry flyer and get a quick overview of the mini data loggers.
Industry Magazine 2025:
Discover solutions, optimize processes
The free magazine for everyone who wants to optimize efficiency and safety in HVAC/R and production systems. Solutions, tips and insights - compact and indispensable.
Preventive maintenance
Emissions measurement
HVAC/R
Indoor air quality / comfort level
Indoor climate monitoring
... and lots more!
Everything within the permissible range.
Process reliability for your HVAC/R systems
Ensure safe and optimal operation, lower operating costs and reduce CO₂ emissions. With efficient heating systems, high-performance refrigeration systems and precisely regulated air conditioning and ventilation systems, you can reliably monitor the key parameters and ensure maximum process reliability – and of course in compliance with all standards.
Efficient work: Precise measurement technology and versatile solutions for all HVAC/R tasks.
Smarter networking: One app for all applications – intuitive and innovative.
Perfect results: Personalized support for calibration and test equipment management.
Reliable support: Practical training, customized advice and technical support.
Maximum efficiency.
Reassuringly reliable
Set new standards in the maintenance of air conditioning and ventilation systems and the assessment of indoor air quality. Automated measurement processes, intuitive user guidance and state-of-the-art sensor technology enable precise monitoring of climate-relevant parameters such as temperature, humidity and airflow velocity in real time. Minimize risks, ensure optimum operation and maximize the process reliability of your systems.
Experience a new level of efficiency with the flow and IAQ kits
Practical helpers for efficient workflows
Uniquely lightweight, impressively versatile
Adjust ventilation systems quickly
Uniquely lightweight, impressively versatile
Fast, precise – perfect with app
With the compact professional measuring instruments from Testo and the testo Smart App, you always have an overview of key environmental parameters such as temperature, humidity, flow, CO₂ or pressure. Maximum efficiency, easy to use and precise results thanks to the app connection.
Perfect power play.
Reliable results
With precise measurement technology from Testo, you can achieve reliable measurement results – at all times and under all conditions. Smart sensors and seamless connectivity record, analyze and document all relevant parameters centrally. This allows you to evaluate your refrigeration systems safely and efficiently, maximize cost-effectiveness and ensure maximum process reliability.
Efficiency meets simplicity.
The new testo 558s
Everything at a glance: New clear measurement value graphs (incl. 30-minute trend curves) for reliable system assessment
Wireless: Full connectivity to the entire refrigeration technology portfolio such as testo Smart Probes, refrigerant scale, pump and more
Maximum safety: A3 and A2L compatibility for 96 refrigerants and free updates
Long-term data recording: Up to 72 h as an upgrade via in-app purchase
With the practical Smart Vacuum kits
Ready to go immediately
Recommended by the professionals:
Refrigeration technology in the offshore sector
The tools from Testo are a valuable support in my work as a refrigeration engineer in the offshore sector. Testo's intuitive user interface and Bluetooth® connectivity make diagnostics quicker and easier and allow me to track and manage data in real time via the testo Smart App.
Magno Pereira da Silva
·Eng & Tech Ilha
Full connectivity for refrigeration technology
Fully automatic evacuation and filling.
Vacuum pump and refrigerant scale
Refrigeration knowledge in 3 modules
Free specialist knowledge about refrigeration systems in three practical modules. Secure your knowledge advantage now and request refrigeration knowledge.
Understanding refrigeration plants
Principles and main components of refrigeration technology
Measuring refrigeration systems correctly
And lots more besides ...
Reliable and precise measurement.
Exploit potential to the full
With a comprehensive product portfolio, precise measurement technology and tailor-made solutions, you can reliably optimize heating systems and heat pumps. Thanks to the testo Smart App, you can carry out all measurement tasks quickly, efficiently and completely documented.
Flue gas measurement at the next level.
testo 300 NEXT LEVEL
Efficient: Wireless parallel measurement of up to four parameters via smart probes and second screen function
Safe: Thanks to integrated sensor protection against CO poisoning for instruments with a measuring capacity of up to 30,000 ppm
Reliable: Extended warranty periods and robust design
Flexible: Probes for every application and many scaling options thanks to attachments and adapters
Practical: Document, save and send all measurement values with the testo Smart App (alternatively data integration in your own software)
Carry out parallel measurement
safely
Our checklist shows you step by step how to carry out parallel measurements safely and efficiently with the testo 300 NEXT LEVEL. From preparation to digital documentation – everything is explained clearly and simply. Benefit from valuable tips that will make your work noticeably easier!
Measurement technology from Testo makes daily work easier.
Development principle:
Our aim is to develop new functionalities that can be integrated into your workflow. In doing so, we view instrument level and the overall system and do not limit ourselves to new developments, but continuously add new functions to our existing portfolio. So with Testo you are always up-to-date.
Niklas Eisenkolb
·Product Manager Heating
RECOMMENDED BY THE PROS:
What users say about the
testo 300 NEXT LEVEL
The combination of the testo 300 NEXT LEVEL and the testo App is user-friendly and time-saving. I need half an hour less time per customer.
Jovany David
·Owner
testo 310 II flue gas analyzer
Simply precise.
Efficient: Measure up to 7 parameters in parallel and show them on the configurable display
Automatic and precise: Measuring cells for O₂, CO and integrated temperature sensor calculate the relevant measurement parameters
Simple: Thanks to intuitive menu navigation and digital documentation, data transfer and customer data management
Smart probes for wireless
parallel measurement – with smartphone operation
One App for all applications
The free testo Smart App provides valuable support for commissioning and maintaining refrigeration, air conditioning and heating systems. With the testo Smart App, you can carry out and document all your measurement tasks faster, easier and more reliably:
Automatic Bluetooth pairing and easy configuration
Remote measurement and monitoring of live measurement data
Second screen function on tablet or smartphone
Easy creation and sending of measurement reports
Parallel measurement
Efficient and reliable
Documentation
Simple and secure
Customer data management
Quick and easy
Data transfer
Professional and convenient
Second screen
Simply convenient
Remote control
Easy and versatile
All in one kit. Everything optimal.
Heat pumps and hybrid systems
Select a suitable set:
More efficient than ever before.
testo 558s heat pump professional kit
Intuitive operation: App feeling in your everyday work
Full connectivity: Seamlessly control all components via the digital manifold or the testo Smart App
Maximum safety: A3 and A2L compatibility for 96 refrigerants and free updates
Efficient: Save time and reduce costs with clever functions and central data management
Versatile efficiency.
Flue gas analysis on large combustion plants
Process reliability, regulations, documentation requirements and energy costs: The key lies in the efficiency of the combustion plant. We have developed measurement technology for your flue gas analysis and the determination of O₂, CO and CO₂ levels to make your work easier.
Robust and accurate flue gas measurement technology with a wide range of flue gas probes, sensors and special options.
Innovative solutions and instruments that are tailored to meet your specific challenges.
Personalized support when you need it: Replacement of wearing parts, calibration and expert advice.
Demand-oriented
optimization
Versatility for the highest demands: Flue gas analysis system testo 350
The testo 350 meets the highest demands in industrial emission measurement. It impresses with its industrial design and suitability for complex data acquisition. It therefore stands for flexibility and optimum system efficiency.
Reliable in practice
Emissions are measured in raw material and energy-intensive processes where gases such as CO, CO2, NOX or SO2 are released. The testo 350 flue gas analyzer comes with a wide range of flue gas probes, sensors and special options to help you meet your daily challenges.
This also impressed Markus Paur from Unitherm CEMCON:
The burner and analyser advantage
Read the full article from WORLD CEMENT Magazine, November 2024
Felix Bartknecht & Dr. Oliver Andrick, Testo, and Markus Paur, UNITHERM CEMCON, explain how combining burners and gas analysers can ignite efficiency in cement plants.
Applications
When analyzing the burner’s behaviour, the focus of attention is often on fuel supply, atomization, control behaviour and emissions values.
Flue gas analyzers can be used to analyze all relevant gases and adjust the combustion process to achieve the best possible ratio of fuel to combustion air volume.
Industrial flue gas analysis
In this comprehensive reference work, you will find practical tips and tricks on the subject of industrial emission measurement. Get your exclusive copy of the new guide to emission and process measurement now.
Combustion processes
Gas analysis for industrial flue gases
Gas analysis technology
Industrial gas analysis applications
Testo gas analysis technology
Ensure process stability. Increase efficiency.
Recognize problems before they arise
Testo thermal imagers allow you to monitor technical installations and electrical systems precisely, non-intrusively and reliably. They detect overheating or wear at an early stage, carry out routine inspections efficiently and document results effortlessly.
Non-contact measurement and control of electrical and mechanical components.
Easy operation and razor-sharp thermal images for fast and reliable results.
Implementation during ongoing operation and guarantee of personal safety.
Simplified workflows with automatic sensor detection, visual analysis and documentation.
Fully automatic thermal image handling.
testo SiteRecognition
Efficient: Detects objects and automatically assigns thermal images correctly
Fast: Significant time savings for recurring measurements of similar measurement objects
Safe: Prevents thermal images from getting mixed up
Intuitive: Easy to operate in conjunction with the testo 883-1 thermal imager and the testo IRSoft PC software
Switch on. Point. Know.
The right thermal imager for every type of user:
Regardless of which instrument you choose, you can work with razor-sharp images and use the many smart functions to make your tasks as efficient as possible.
More reliability with the testo 883-1 thermal imager
Recommended by the professionals:
Since we started using testo SiteRecognition, we’re saving multiple work hours on our nearly 1900 switching cabinets.
Udo Moser
·Service and maintenance Cerdia Produktions GmbH
More reliability with the testo 883-1 thermal imager
Recommended by the professionals:
I would recommend the imager at any time. It’s the perfect tool for professionals.
Christian Schächtele
·badenovaWÄRMEPLUS GmbH & Co. KG
Practical guide for the use of thermal imagers
testo Smart World:
Optimized workflows
Connected measurement technology, seamless compatibility and innovative applications:
The testo Smart World will open up new possibilities for you.
Data management:
Testo measurement technology delivers accurate information for sustainable improvements. Fast, precise and in real time.
Process optimization:
Automated monitoring of critical parameters reduces manual work steps and increases efficiency.
Cost efficiency:
The digital collection, analysis and documentation of critical parameters results in the optimal use of resources.
Become part of the testo Smart World:
Browse the Industry Magazine and subscribe to the newsletter now