Top 10 Best testo in 2026

Main highlights

• •Efficient: The testo 605i is ideal for measurements in rooms, ducts, crawl spaces, registers and environmental boxes/chambers due to the compact probe head bendable to 90°
• •Smart: Enabling live data feed integration and automatic calculations which are conveniently displayed on your terminal device, the instrument is ideal for all HVAC/R technicians
• •Versatile: The testo 605i thermo-hygrometer measures relative air humidity and temperature in rooms and ducts and calculates dew point and wet bulb temperature automatically
• •Easy to use: The digital combometer allows accurate remote monitoring and is operated via mobile device. Supplied calibrated and with 3 AAA batteries for instant use
• •App for Android and iOS: The free testo Smart Probes App is a powerful tool that allows you to read and log measurements and create custom reports which can be saved and shared

Main highlights

• •Product Type:Electromechanical Gauge
• •Item Package Dimension:4.2 cm L X 10.1 cm W X 27.1 cm H
• •Item Package Weight:0.333 kg
• •Country Of Origin: China

Main highlights

• •Versatile; The testo 115i HVAC thermometer is a precise measuring instrument for heating and cooling systems and is thus ideal for all HVAC/R contractors and technicians
• •Easy handling; The HVAC temperature probe measures temperature in pipes quickly and reliably and makes it easier than ever to monitor real-time trending and data logs on any mobile device
• •State of the art; The clamp meter grips pipes up to 1.5" and derives fast, accurate readings thanks to its NTC temperature sensor technology which is more accurate than thermocouples
• •Time-saving; Its intuitive design with Bluetooth integration makes the ac temperature gauge an efficient tool. Data can be displayed and saved in PDF and Excel files, resulting in less paperwork
• •App Connection; Conveniently display graph history, and view, store, and document all measured values directly from your Bluetooth temperature probe on your Smartphone and Tablet

Main highlights

• •Accurate: The testo 552i achieves precise deep vacuum measurements down to single digit resolutions and provides notifications when the evacuation target is met
• •Easy-to-use: The device is equipped with a built-in 45° angle for convenient installation and rugged IP 54 certified housing, which makes it extraordinarily compact and reliable
• •Clever: For the purposes of wireless vacuum measurement, the testo 552i automatically connects to digital manifolds and can be used via just one service port and no loss of refrigerant
• •Efficient: The gauge identifies vacuum in a rapid and easy manner and can display data on the digital manifold screen and in the testo Smart App in real time
• •Smart App: Take advantage of clearly visualized documentation from a smartphone or tablet. Remotely operate service and maintenance tasks and send results directly from the job site

Main highlights

• •Measures air velocity, volume flow, and temperature as well as air flow water registers and automatically calculates volume flow (enter duct dimensions simply)
• •Not air density correction required due to design
• •Measure volume flow water several outlets simultaneously (using multiple smart probes) to adjust system balance
• •Timed/multipoint averaging to get accurate air flow profiles

Main highlights

• •Efficient: The testo smart probe set offers precise measurements and calculations for heating and cooling systems, making it ideal for all HVAC/R contractors and technicians
• •Complete Set: Includes two testo 115i pipe-clamp thermometers and two testo 549i high pressure gauges, as well as a protective hard-shell case with precise-fit compartments
• •Testo 115i: With a grip of up to 1.5”, the wireless thermometer provides quick and reliable temperature and flow and return temperature measurements in pipes
• •Testo 549i: The pressure meter enables accurate readings for high and low pressure. The 45-degree connector simplifies servicing and troubleshooting – without the need for hoses
• •Smart App: The free testo Smart Probes App is a powerful tool that allows you to remotely read and log measurements and create custom reports which can be saved and shared

Main highlights

Main highlights

• •Dependable: The testo 550i with its rugged housing (IP54) was particularly created for harsh environments, offering the reliability needed by HVACR technicians
• •User-friendly: With its compact design, 2-way valve block and automated probe connection, the HVAC meter provides convenient handling in difficult to access environments
• •Smart App: Take advantage of clearly visualized documentation from a smartphone or tablet. Remotely operate service and maintenance tasks and send results directly from the job site
• •Efficient: The wireless manifold determines high and low pressure as well as evaporation and condensation temperature. Optionally add suitable accessories for an enhanced performance
• •Accurate: Thanks to its unique measurement technology and extremely sensitive pressure sensors, the air conditioning meter achieves particularly quick and easy measurements

Main highlights