--- product_id: 386510290 title: "testo 405i Hot-wire Anemometer I Wireless Smart Probe for air velocity, in-duct airflow and temperature" brand: "testo" price: "€ 228.33" currency: EUR in_stock: true reviews_count: 5 category: "Testo" url: https://www.desertcart.pt/products/386510290-testo-405i-hot-wire-anemometer-i-wireless-smart-probe-air store_origin: PT region: Portugal --- # Telescopic shaft extends to 15" Bluetooth 4.0 wireless connectivity Accurate temp range -20 to 60°C testo 405i Hot-wire Anemometer I Wireless Smart Probe for air velocity, in-duct airflow and temperature **Brand:** testo **Price:** € 228.33 **Availability:** ✅ In Stock ## Summary > 🌬️ Elevate your airflow game with testo 405i — precision meets smart tech! ## Quick Answers - **What is this?** testo 405i Hot-wire Anemometer I Wireless Smart Probe for air velocity, in-duct airflow and temperature by testo - **How much does it cost?** € 228.33 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/386510290-testo-405i-hot-wire-anemometer-i-wireless-smart-probe-air) ## Best For - testo enthusiasts ## Why This Product - Trusted testo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Lightweight Durability:** Compact 4.2 oz design with rugged ABS housing ensures portability and impact resistance for on-the-go professionals. - • **Reach the Hard-to-Reach:** Extendable 15" telescopic shaft lets you effortlessly access tight ducts and confined spaces. - • **Precision in Every Breeze:** Accurately measures air velocity up to 5906 fpm and temperature within ±0.5°C for flawless HVAC diagnostics. - • **Seamless Wireless Workflow:** Bluetooth 4.0 connectivity pairs instantly with your smartphone for remote readings and real-time data. - • **Smart Data, Smarter Decisions:** Integrated Smart Probe App transforms measurements into clear tables, graphs, and customizable reports—no manual math needed. ## Overview The testo 405i is a wireless hot-wire anemometer designed for professional HVAC and air conditioning maintenance. It measures air velocity, temperature, and in-duct airflow with high accuracy, featuring a telescopic shaft for hard-to-access areas and Bluetooth 4.0 connectivity for seamless smartphone integration. Paired with the Smart Probe App, it offers remote readings, data visualization, and custom reporting, all in a lightweight, durable package. ## Description 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 Review: Dust Collection Balancing Game Changer - I'm on my second one of these. I start up industrial dust collection systems and traditionally use a pitot tube and Dwyer digital manometer. I did several duct balancing trips where I used this and the traditional pitot tube and found this to be extremely accurate and much more user friendly so I now only use this. It has a max velocity of 6,000 FPM, so while it works for traditional dust collection it does not work for high performance applications (like Negative Lift systems). Its minimum temp is somewhere around -10 degF, so it does not work in extreme winter conditions. The bulb is sensitive to buildup, but less sensitive than my collapsible pitot tube. Eventually, the bulb does bend over and even if you straighten it the readings will be incorrect. That's when its time to throw it out and get a new one. Over all, I highly recommend. Review: Great product and delivery - Product is accurate and easy to use Delivery was so fast , actually reached before delivery date by 5 days Thanks desertcart ## Features - RELIABLE; The hot wire anemometer 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 wind meter can be used to measure airflow even in areas that are difficult to access - PORTABLE; The compact airflow meter is extremely lightweight and time-saving, making it suitable for personal and professional servicing of air conditioning or HVAC systems - WIRELESS; Equipped with Bluetooth 4.0, the wind speed meter can easily be connected to a smartphone or tablet and offers remote measurement readings - SMART; The Smart Probe App for testo gauges hvac provides convenient instrument readings as tables and graphs. All measured data can be stored, retrieved, or included in custom reports ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B018VO5GI2 | | Brand | Testo | | Brand Name | Testo | | Customer Reviews | 4.5 out of 5 stars 620 Reviews | | EU Spare Part Availability Duration | 1 Years | | Global Trade Identification Number | 04029547014260 | | Included Components | testo 405i hot-wire anemometer, 3 AAA batteries and certificate of conformity | | Item Dimensions | 20 x 3 x 4.1 centimeters | | Item Weight | 0.23 Kilograms | | Item dimensions L x W x H | 20 x 3 x 4.1 centimeters | | Item weight | 0.23 Kilograms | | Manufacturer | Testo | | Material | Acrylonitrile Butadiene Styrene | | Material Type | Acrylonitrile Butadiene Styrene | | Measurement Accuracy | ±0.9 °F / ±0.5 °C | | Measurement accuracy | ±0.9 °F / ±0.5 °C | | Model | 405i | | Number of Items | 1 | | Part Number | 0560 1405 | | Response Time | 5 seconds | | Specific Uses For Product | airflow measurement, air velocity measurement, temperature measurement, in-duct airflow measurement, HVAC system servicing, air conditioning system maintenance | | Style | Wireless Smart Probe | | Style Name | Wireless Smart Probe | | Unit Count | 1 Count | ## Product Details - **Brand:** Testo - **Item dimensions L x W x H:** 20 x 3 x 4.1 centimeters - **Item weight:** 0.23 Kilograms - **Material:** Acrylonitrile Butadiene Styrene - **Style:** Wireless Smart Probe ## Images ![testo 405i Hot-wire Anemometer I Wireless Smart Probe for air velocity, in-duct airflow and temperature - Image 1](https://m.media-amazon.com/images/I/41jIXLuWH9L.jpg) ## Questions & Answers **Q: Can you use it to measure air mass? Like kg / hour? And does it compensate for air temperature and air pressure?** A: It measures air velocity, period. Does not compensate for pressure or temperature. Does not measure air mass flow directly. **Q: Can it calculate or convert to Feet per minute?** A: Here are the specs you are looking for: Measuring range: 0 to 6,000 fpm Accuracy: ±(20 fpm +5 % of m.v.) (0 to 394 fpm) / ±(59 fpm +5 % of m.v.) (394 to +3,000 fpm) Resolution: 1.97 fpm Volume flow: (cfm) 0 to 99,999 cfm (Resolution: 0.1 cfm) **Q: Can you use it to measure the delta?** A: There's a trendline function that can keep track of changing temp over time. **Q: Does this device show a live CFM reading?** A: Why yes it does sir ## Customer Reviews ### ⭐⭐⭐⭐⭐ Dust Collection Balancing Game Changer *by R***N on 12 August 2025* I'm on my second one of these. I start up industrial dust collection systems and traditionally use a pitot tube and Dwyer digital manometer. I did several duct balancing trips where I used this and the traditional pitot tube and found this to be extremely accurate and much more user friendly so I now only use this. It has a max velocity of 6,000 FPM, so while it works for traditional dust collection it does not work for high performance applications (like Negative Lift systems). Its minimum temp is somewhere around -10 degF, so it does not work in extreme winter conditions. The bulb is sensitive to buildup, but less sensitive than my collapsible pitot tube. Eventually, the bulb does bend over and even if you straighten it the readings will be incorrect. That's when its time to throw it out and get a new one. Over all, I highly recommend. ### ⭐⭐⭐⭐⭐ Great product and delivery *by M***D on 31 January 2026* Product is accurate and easy to use Delivery was so fast , actually reached before delivery date by 5 days Thanks Amazon ### ⭐⭐⭐⭐⭐ Muy útil *by V***R on 11 September 2019* Funciona muy bien en los conductos. La app vincula rápido. Es cómodo para mover. ## Frequently Bought Together - testo 405i – Anemometer handheld for air velocity, in-duct airflow, and temperature – CFM meter with Bluetooth and App operation - Testo 605i | Thermohygrometer for Indoor Temperature and Humidity Measurement | with Bluetooth Support - Testo 0560 1510 510I Differential Pressure Manometer Smart and Wireless Probe, 1" Height, 1" Width, 6" Length --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/386510290-testo-405i-hot-wire-anemometer-i-wireless-smart-probe-air](https://www.desertcart.pt/products/386510290-testo-405i-hot-wire-anemometer-i-wireless-smart-probe-air) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-27*