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Your cart is empty. testo 405i – Digital Thermometer for measuring airflow, air velocity, and temperature on air conditioning systems
Measure air velocity, temperature, and volume flow with just one instrument - the durable testo 405i temperature probe provides reliable measurements and, if combined with the smart probe app, allows remote measurement readings. With its automatic calculations, the app erases the need for error-prone manual calculations. Merely download the testo smart probe app, take advantage of user-friendly readings and create custom reports that are quickly saved and retrieved.
The telescopic shaft is extendable and rotatable, making otherwise hardly accessible in-duct measurements of airflow fast and easy. The rugged housing protects the device from impact, making it extremely durable.
Technical Data:
Temperature measuring range: -4° to 140 °F / -20 to +60 °C
Temperature measurement accuracy: +-0.9 °F / +-0.5 °C
Velocity measuring range: 0 to 5906 fpm / 0 to 30 m/s
Velocity measurement accuracy: +-(19.7 fpm + 5 % of mv) (0 to 394 fpm) / +-(0.1 m/s + 5 % of mv) (0 to 2 m/s) / +-(59.1 fpm + 5 % of mv) (394 to 2953 fpm) / +-(0.3 m/s + 5 % of mv) (2 to 15 m/s)
Dimensions: 8 x 1 x 2 in. / 200 x 30 x 41 mm
Weight: 4.22 oz. / 119.6 g
System Requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Scope of Delivery:
testo 405i Bluetooth hot-wire anemometer, including 3 AAA batteries and certificate of calibration
gurdeep
Reviewed in Canada on February 8, 2025
Recommended products for all the gas techs, nice, accurate and convenient specially for air flow measurement. All over really good one, value for money.
Ricardo Ramírez
Reviewed in Mexico on February 7, 2025
Excelente calidad!!
Artur Nowak
Reviewed in Poland on January 20, 2025
Dobry Dobry Bardzo Dobry
カスタマー
Reviewed in Japan on September 28, 2024
素晴らしい！価格以上の性能です
Liz
Reviewed in the United States on September 24, 2024
This works very well - exactly what I was looking for. A budget and user friendly way to spot-check our fume hoods to make sure they're still operating correctly between annual certifications.
david gentes
Reviewed in the United States on August 5, 2024
Great product and works great
Lukasz Koplejewski
Reviewed in the United States on August 24, 2024
Great tool for any HVAC tech
Brent Bergman
Reviewed in the United States on July 14, 2024
Anemometers are used to measure air speed. Many use little propellers that spin with airflow, but if you need to measure airflow inside of an enclosed space Testo 405i is what you need. Place the Testo measurement probe thru a small hole and air speed is simple. Very easy to use and good value for the design
neezer
Reviewed in the United States on March 12, 2024
Worked great with the Testo app, rather convenient! Got one use out it when it fell from my stepladder, hit the floor and the bulb wires separated. No external damage. Granted, DON'T drop them, but for the price, it should be able to take a little bounce from field use. Not worth sending it back to Testo, $25 upfront for handling before it is evaluated for an obvious bulb change (Testo does not sell a field replaceable bulb). Don't bang it or drop it. or maybe just buy one that's a little more robust or has a replacement bulb/wand for those times you do.
camilo agudelo
Reviewed in the United States on December 4, 2024
Very useful
John Post
Reviewed in the United States on November 18, 2023
I bought this to measure traditionally low air volumes coming out of long horizontal vents (honeycombs) of refrigerated cases in grocery stores. This, as a commissioning engineer, helps me qualify if there is any blockage (ice buildups) or if a fan is out. Using it via blue-tooth on my smartphone was very easy. What I didn't like was the temperature measurement response. I was hoping it would respond quickly, but it doesn't. Measuring a refrigerated airstream (~32dF) from an environment of 70dF took about 15 minutes, before I got a consistent reading. For my job, this is much too long. So I will use the tool to measure air volumes only.
Fil
Reviewed in Italy on October 27, 2022
Lo strumento è facilissimo da usare e configurare; le misurazioni confrontate con altri strumenti risultano precise.Per l'uso è necessario installare l'app sul telefonino (io uso andorid) ma la configurazione è molto semplice.Pienamente soddisfatto
swhitting
Reviewed in the United States on July 4, 2021
AC guy could not figure out why my air conditioner was icing up. With this meter I diagnosed low blower performance and he had to replace my defective blower under warranty. Fixed my air conditioner. On line videos show you how to use all the features. It works through you smart phone and is very accurate with multiple measurement methods.
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