---
product_id: 53180753
title: "testo 405i - Bluetooth Thermal Anemometer Smart Probe"
brand: "testo"
price: "€ 301.44"
currency: EUR
in_stock: true
reviews_count: 10
category: "Testo"
url: https://www.desertcart.at/products/53180753-testo-405i-bluetooth-thermal-anemometer-smart-probe
store_origin: AT
region: Austria
---

# 400mm telescopic reach Bluetooth smart connectivity Precise thermal air velocity & temp testo 405i - Bluetooth Thermal Anemometer Smart Probe

**Brand:** testo
**Price:** € 301.44
**Availability:** ✅ In Stock

## Summary

> 📊 Measure Smarter, Work Faster – The Future of Airflow Testing is Here!

## Quick Answers

- **What is this?** testo 405i - Bluetooth Thermal Anemometer Smart Probe by testo
- **How much does it cost?** € 301.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/53180753-testo-405i-bluetooth-thermal-anemometer-smart-probe)

## 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

- • **Compact Yet Mighty:** Lightweight (4.22 oz) and sleek design fits comfortably in your toolkit without weighing you down.
- • **Trusted Industry Leader:** Backed by Testo’s 60+ years of innovation and a 4.5-star rating from nearly 600 professionals worldwide.
- • **Seamless Smart Integration:** Bluetooth-enabled testo Smart Probes App offers real-time readings, trend analysis, and data logging at your fingertips.
- • **Tailored for Ventilation Pros:** Simple duct dimension configuration ensures pinpoint volume flow calculations tailored to your project specs.
- • **Extend Your Reach with Precision:** Telescopic probe extends up to 400mm for effortless duct access and accurate volume flow measurement.

## Overview

The testo 405i is a Bluetooth-enabled thermal anemometer smart probe designed for precise measurement of air velocity, volume flow, and temperature in ventilation ducts. Featuring a telescopic probe extending up to 400mm and seamless integration with the testo Smart Probes App, it offers professionals an intuitive, accurate, and portable solution trusted globally with over 60 years of Testo expertise.

## Description

From the brand ABOUT TESTO The global leaders of professional measurement technology. With measuring instruments, solutions and services from Testo, you can be sure that you are always making the right decision. Why choose Testo? With over 60 years of experience in the test and measurement industry, we continuously innovate to revolutionise testing across diverse sectors, including boilers, refrigeration systems, and food and pharmaceutical products. With measuring instruments, solutions and services from Testo, you can be sure that you are always making the right decision. Why choose Testo? With over 60 years of experience in the test and measurement industry, we continuously innovate to revolutionise testing across diverse sectors, including boilers, refrigeration systems, and food and pharmaceutical products. See Our Range

Review: Five Stars - Perfect product for the application
Review: 450i anemometer: works fine - The 450i anemometer worked fine (screenshot attached). I did the math using the cross-section area of the duct, and the number was within 5% of than the rated output of the blower that I was to create the air flow. The app was easy to install, but asked access to my contacts and location. The manufacturer should offer options to disable this, and should not bundle reviews for all smart probes into one. Please offer the case with foam inserts to keep the probes. Thanks!

## Features

- For measuring volume flow, air velocity and temperature
- Simple configuration of the dimension and geometry of the duct cross-section for determining the volume flow
- Convenient for working in ventilation ducts thanks to its telescopic tube, which can be extended up to 400 mm
- Really convenient to operate thanks to the testo Smart Probes App (e.g. easy viewing of readings, measurement data trend, log function)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B018VO5GI2 |
| Best Sellers Rank | 5,974 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 4 in Anemometers |
| Brand | Testo |
| Country Of Origin | China |
| Customer Reviews | 4.5 4.5 out of 5 stars (598) |
| EU Spare Part Availability Duration | 1 Years |
| Global Trade Identification Number | 04029547014260 |
| Item Dimensions | 20 x 3 x 4.1 centimetres |
| Item Type Name | Bluetooth Thermal Anemometer Smart Probe |
| Item Weight | 0.23 Kilograms |
| Manufacturer | testo |
| Material | PE_(Polyethylene) |

## Product Details

- **Brand:** Testo
- **EU Spare Part Availability Duration:** 1 Years
- **Item dimensions L x W x H:** 20 x 3 x 4.1 centimetres
- **Item weight:** 0.23 Kilograms
- **Material:** PE_(Polyethylene)

## Images

![testo 405i - Bluetooth Thermal Anemometer Smart Probe - Image 1](https://m.media-amazon.com/images/I/41jIXLuWH9L.jpg)
![testo 405i - Bluetooth Thermal Anemometer Smart Probe - Image 2](https://m.media-amazon.com/images/I/71LjJwAZg0L.jpg)
![testo 405i - Bluetooth Thermal Anemometer Smart Probe - Image 3](https://m.media-amazon.com/images/I/71NYQ58pHRL.jpg)
![testo 405i - Bluetooth Thermal Anemometer Smart Probe - Image 4](https://m.media-amazon.com/images/I/61nHxWO0A1L.jpg)
![testo 405i - Bluetooth Thermal Anemometer Smart Probe - Image 5](https://m.media-amazon.com/images/I/713JUeQevkL.jpg)

## Available Options

This product comes in different **Style** options.

## 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

### ⭐⭐⭐⭐⭐ Five Stars
*by R***A on 12 March 2018*

Perfect product for the application

### ⭐⭐⭐⭐ 450i anemometer: works fine
*by A***Y on 25 September 2021*

The 450i anemometer worked fine (screenshot attached). I did the math using the cross-section area of the duct, and the number was within 5% of than the rated output of the blower that I was to create the air flow. The app was easy to install, but asked access to my contacts and location. The manufacturer should offer options to disable this, and should not bundle reviews for all smart probes into one. Please offer the case with foam inserts to keep the probes. Thanks!

### ⭐ UTTER RUBBISH!!!
*by R***G on 20 July 2017*

UTTER RUBBISH! THE BLUETOOTH CONNECTION LASTED FOR JUST A FEW MINUTES AND THEN DISCONNECTED ITSELF AND IT WON'T RECONNECT. THE INSTRUCTION MANUAL IS TOTALLY USELESS AND I HAVE ABSOLUTELY NO IDEA HOW TO TRANSMIT DATA FROM THE PROBE TO MY PHONE. IT IS GOING STRAIGHT BACK TO WHERE IT CAME FROM!

## 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

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-04-23*