Best Testo in 2026

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

Efficient: The testo 550 with its sturdy housing and 2-way valve block was particularly created for harsh environments and offers data storage for up to 60 refrigerants

Accurate: Thanks to two temperature compensated pressure sensors, the wireless manifold determines high and low pressure as well as evaporation and condensation temperature

Multiple functions: The digital manifold features the display of temperature difference, temperature compensated leakage tests and calculation of superheating and subcooling

EASY OPERATION; The testo 760-2 amprage tester is ideal for electric testing on refrigeration, air conditioning and heating systems and allows for quick and convenient application

RELIABLE MEASUREMENT; Equipped with an auto-test setup, the volt meter offers precise readings, detects the lead connection, and prevents switching from V to A or A to V if leads are not in proper socket

AUTOMATION; To eliminate mistakes, save time and optimize accuracy, the voltage tester automatically detects testing and selects the correct meter configuration

Efficient: With over 60 refrigerant profiles, automatic superheat and subcooling calculations as well as precise pressure and temperature measurements, the testo 550s is the tool for every HVAC job

Three Hoses included: This kit includes 3 high quality hoses in blue, red and yellow, each 5 ft. long, ¼” SAE (straight and 45° angle) and suitable for all common refrigerants

552i Micron Gauge: The testo 552i achieves precise deep vacuum measurements down to single digit resolutions and provides notifications when the evacuation target is met

Measure high-side & low-side refrigerant pressure & temperatures (simultaneously) of ac/refrigeration systems

Low-loss ac/r system checks. Not hoses required

Complete and compact wireless ac/r test kits

EFFICIENT; The testo 310 co2 detector is ideal for more complex flue gas analyses, maintenance, safety checks, and furnace efficiency confirmations of residential heating systems

VERSATILE; With its advanced sensor technology, the carbon monoxide meter offers accurate readings of O2, CO2, ambient CO, draft and pressure, temperature and combustion efficiency

DURABLE; Thanks to its rugged housing with an integrated, kink-resistant hose, the gas leak detector is securely protected from impact and leaks

ACCURATE; The manifold gauge set offers extremely precise readings of temperature and pressure on air conditioning systems, refrigeration, as well as heat pumps

INTERFACE; Equipped with a large backlit display and intuitive menu navigation, the AC manifold is particularly easy to use, even in low light conditions, which provides constant access to all desired functions

RELIABLE; The ac manifold gauge set is designed to meet the high industry standard. Completed with a sturdy housing (protection class IP54), the instrument delivers dependable data even in difficult condition

Differential pressure (manometer) measures static pressure, air flow, and volume flow (with pitot tube not incl.)

Measures manifold pressure and pressure drop across filters and coils and has measurement menu in app that includes pressure drop alarms

Easy configuration and calculations for volume flow (enter pitot tube factor and dimensions easily)

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

Reliable measurement: The smart probe accurately measures air velocity, temperature and in-duct airflow, as well as volume flow if the duct dimensions are provided

Practical: With its hinged, telescopic shaft that can be extended to up to 15", the ac sensor can be used to measure airflow even in areas that are difficult to access

Portable: The compact anemometer probe is extremely lightweight and time-saving, making it suitable for personal and professional servicing of air conditioning or HVAC systems

Versatile: The testo 510 measures differential pressure, total external static pressure, manifold pressure and duct velocities, making it ideal for HVAC/R field servicing technicians

Precise measurements: Thanks to the temperature and air density compensated pressure sensor, the air pressure meter delivers accurate data for ten different measurement units

Always ready: The backlist display, in conjunction with its intuitive design and magnets on the back, allow for a convenient application of the compact digital pressure gauge

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

Testo 605i: The thermohygrometer is equipped with a bendable probe head and thus achieves remote temperature measurements in rooms, ducts, crawl spaces and registers

Testo 115i: With a grip of up to 1.5”, the wireless thermometer provides quick and reliable temperature and flow and return temperature measurements of pipes

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

State-of-the-art: The testo 557s digital 4- valve manifold replaces multiple HVAC tools and was developed to efficiently lighten your workload and deliver the most accurate results possible

4 Hoses included: This kit includes 3 high quality hoses in blue, red and yellow, each 5 ft. long, ¼” SAE (straight and 45° angle), suitable for all common refrigerants

552i Micron Gauge: The testo 552i achieves precise deep vacuum measurements down to single digit resolutions andprovides notifications when the evacuation targetis met

CONVENIENT; The vacuum gauge replaces multiple HVAC gauges and was developed to efficiently lighten your workload and deliver the most accurate results possible

USER-FRIENDLY; With its compact design, 4-way valve block and automated probe connection, the manometer provides convenient pressure measurement in areas that are difficult to access

552i MICRON GAUGE; The testo 552i achieves precise deep vacuum measurements down to single digit resolutions and provides notifications when the evacuation target is met

Dependable: The testo 550i with its rugged housing (IP54) block was specifically 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 pressure measurement in difficult to access environments

552i Micron Gauge: The testo 552i achieves precise deep vacuum measurements down to single digit resolutions and provides notifications when the evacuation target is met

Dependable: The testo 550i with its rugged housing (IP54) block was specifically 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 pressure measurement in difficult to access environments

605i Thermohygrometer: Equipped with a bendable probe head, the combometer achieves remote temperature and air humidity measurements in rooms, ducts, crawl spaces and registers

Vane anemometer measures air velocity in m/s, air temperature in degrees C, and humidity in %RH; and also calculates windchill, dewpoint, and wet bulb temperatures

Hold function freezes a reading on the display and maximum and minimum functions display the highest and lowest readings since the meter was powered on

Timed mean function displays an average reading over time

Efficient: The combustion testing tool reliably measures the carbon monoxide and O2 level of furnaces and boilers, as well as temperature, draft and differential pressure

Durable: The flue gas meter is equipped with an extremely sensitive CO and O2 sensor with up to 6 years of life expectancy and a measuring range up to 4,000 ppm

Easy application: Start measuring from standby mode at the touch of a button. Extra strong magnets at the back of the meter enable a hands free and secure measuring operation

testo 510i

Fast and reliable: Thanks to automatic zeroing, the testo 316-3 measuring instrument for HVAC systems delivers rapid measurements and can be used in previously contaminated areas

Versatile: The durable, battery-powered detector provides reliable measurements for all CFCs, HFCs and HCFCs as well as R22, R134a, R404A, R410A, R507 and R438A refrigerants

Excellent sensitivity: The patented heated diode sensor with outstanding high/low sensitivity adjustment down to 0.15 oz./year makes locating refrigerant leaks amazingly efficient

Versatile: The testo 420 balometer flow hood provides reliable data for air velocity, volume flow, absolute and differential pressure, air temperature, as well as relative humidity

Efficient: The unique CEC approved flow straightener converts the turbulent air into a virtually uniform airflow, achieving particularly accurate data and calculations

Easy operation: Thanks to the lightweight design, ergonomic handles and tiltable display, the durable air velocity meter offers a convenient application of overhead measurements

PRECISE; The Testo 417 wind meter is the ideal instrument for efficient and accurate determination of velocity, volume flow, and temperature at air conditioning inlets and outlets, and ventilation systems

CONVENIENT; Thanks to the integrated 100 mm vane and automatic calculation and display of time and point, as well as volume flow, the anemometer handheld achieves fast and reliable results

READY TO GO; Easily configure your pre-calibrated wind gauge with the smart app on your smartphone or tablet to achieve efficient regulation of balanced residential ventilation

Better Accuracy: The Lasergrip’s 12:1 distance-to-spot ratio enables you to accurately measure targets from a comfortable distance. For best results, position the thermometer approximately 14.17 inches / 36 centimeters away from the target

Adjustable Emissivity: The upgraded Lasergrip lets you quickly change the emissivity from 0.1–1.0 by holding the Up and Down buttons. Whether you’re working on your car or testing the temperature of your grill, the Lasergrip can help you get the job done

Wide Range: Choose your preferred unit and measure temperatures anywhere within the upgraded range of -58°–842°F / -50°–450°C. Then watch as your result appears on the bright LCD display in less than half a second

ACCURATE - Our laser thermometer gun has an emissivity range of 0.1 to 1.0 for precise readings across different surfaces and conditions. For best results, the reader should be 14" away from the object.

VERSATILE - Use this handy laser temperature gun at home and in industrial settings. Check the heat of your oven or griddle, complete HVAC projects, measure the temp of any vehicle's engine, and more.

EASY TO USE - Simply scan the surface of your object, hold down the trigger of the IR thermometer gun, and release to get live temperature readings anywhere between -58ºF and 1112ºF (-50ºC and 600ºC).

Air Comfort Indicator: This humidity meter with humidity level icon indicates air conditions - DRY/COMFORT/WET, allowing this humidity sensor to ensure you’re always aware of changes to your home/household with just a quick glance

High Accuracy & Quick Refresh Rate: This inside thermometer features a high accuracy of ±2–3%RH and ±1°F, making it ideal for measuring fluctuating readings like those found in a greenhouse; Data measurements are updated every 10 seconds to give you the latest updates on your environment

High & Low Records: This hygrometer digital thermometer displays high/low temperature and humidity levels to allow you to make proper comparisons using your home’s data

Wide Temperature Range: Measure an upgraded temperature range from -58°–1130°F / -50°–610°C and get your result in 500 ms; The display will also show the max temperature of the surface you’re measuring.

Professional EMS Mode: The Lasergrip 1080 Infrared Thermometer has an emissivity range of 0.1–1.0 for precise readings across different surfaces and conditions; Quickly adjust the emissivity by pressing and holding the Up and down buttons.

Non-Contact: 12:1 D:S, the Lasergrip can accurately measure targets from a distance, making it safer to measure dangerous objects; For the best accuracy, the distance between the thermometer and the object of measurement should be approximately 14.17 in.

Face Icon Comfort Indicator: Humidity temperature gauge features face icons to indicate DRY/COMFORT/WET air conditions, quickly informs you how to adjust your humidifier or dehumidifier to achieve optimal comfort

Highly Accurate Sensors: This temperature humidity sensor features a high accuracy of ±1°F/°C and ±2%-3%RH, making it ideal for measuring dynamic environments like greenhouses

Fast Refresh Rate: This digital indoor thermometer refreshes every 10 seconds to provide the latest updates for temperature and humidity readings

Highly Accuracy - Laser temperature gun has an object distance of 12:1 and can measure targets at a longer distance. High quality sensors can be used to complete measurements in 1 seconds. The measurement accuracy is ±2% or ±2 °C, which is suitable for most daily life.

Easy to Use - Simply scan the surface of your object, hold down the trigger of the IR thermometer gun, and release to get live temperature readings anywhere between -58°F and 932°F (-50°C and 500°C).

Backlit Color Display - HD colorful VA display illuminates numbers with distinct resolution, for work in low-light or no-light conditions, also has an 20s auto-off function to extend the battery life, low battery indicator ensure you never accidentally run out of juice (2 x AAA battery included).

[High Accuracy & 5s Fast Refresh]: Built-in smart temperature humidity sensor, the indoor thermometer is accurate to ±1°F while humidity is ±5%RH. Enjoy precise data from the room thermometer indoor every 5 seconds.

[Air Comfort Indicator]: DOQAUS thermometer for home features 3 different face icons to indicate DRY/COMFORT/WET air condition. Remind you to adjust your humidifier or dehumidifier accordingly and help you will always live in the most comfortable environment.

[2.3in Easy-to-Read LCD Display]: The thermometer hygrometer features a 2.3in clear LCD display with large bold numbers, allowing you to read the digital from any angle. The hygrometer digital is lightweight, compact, and easy to carry.