---
product_id: 25479456
title: "Testo 405i Smart Probe"
brand: "testo"
price: "$416.19"
currency: USD
in_stock: null
reviews_count: 13
category: "Testo"
url: https://www.desertcart.ec/products/25479456-testo-405i-smart-probe
store_origin: EC
region: Ecuador
---

# 15" telescopic shaft for tight spaces Bluetooth 4.0 wireless connectivity Accurate temp range -4° to 140°F Testo 405i Smart Probe

**Brand:** testo
**Price:** $416.19
**Availability:** ❌ Out of Stock

## Summary

> 🌬️ Elevate your airflow game with testo 405i — precision meets portability!

## Quick Answers

- **What is this?** Testo 405i Smart Probe by testo
- **How much does it cost?** $416.19 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/25479456-testo-405i-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

- • **Reach the Unreachable:** Extendable 15-inch telescopic shaft lets you effortlessly measure airflow in the tightest ducts and vents.
- • **Lightweight Powerhouse:** Compact and weighing just 4.2 oz, it’s the perfect portable tool for HVAC pros on the move.
- • **Precision in Every Breath:** Hot-wire sensor delivers ultra-accurate airflow, velocity, and temperature readings with ±0.5°C accuracy.
- • **Cut the Cord, Not the Control:** Seamless Bluetooth 4.0 integration connects to your smartphone for remote monitoring and data logging.
- • **Smart Data, Smarter Decisions:** Use the testo Smart Probe App to visualize, store, and generate custom HVAC reports on the fly.

## Overview

The testo 405i is a compact, handheld hot-wire anemometer designed for professional HVAC and air quality technicians. It measures air velocity, temperature, and volume flow with high accuracy, featuring a 15-inch extendable telescopic shaft for hard-to-reach ducts. Bluetooth 4.0 connectivity pairs with the Smart Probe App for remote readings, data visualization, and custom reporting. Lightweight and durable, it’s optimized for efficient duct inspections and airflow balancing.

## Description

testo 405i Digital Anemometer handheld 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 405i: Temperature measuring range: -4° to 140 °F / -20 to +60 ° 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, 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: MUST HAVE FOR TAB PRO’S AND MECHANICAL PERFORMANCE VERIFICATION - Used this on a very important project where they were low on cfm after i changed the configuration my report was within 2 cfm of the tab contractors device love it super easy and accurate MUST HAVE FOR HVAC AND TAB PRO’S

## Features

- Reliable; The hot wire handheld anemometer provides precise measurements of air velocity, temperature, and in-duct airflow, and can calculate volume flow when duct dimensions are provided
- Practical; The hinged, telescopic shaft of the cfm meter extends up to 15", making it easy to measure airflow even in tight ducts, vents, or other hard-to-reach areas during HVAC inspections
- Portable; This compact windflow meter is lightweight and easy to carry, saving time and effort and making it suitable for personal and professional servicing of air conditioning or HVAC systems
- Wireless; Equipped with Bluetooth 4.0, the air flow meter connects effortlessly to smartphones or tablets, allowing users to take accurate remote readings without being tied to the device
- Smart; The Smart Probe App for testo gauges hvac provides convenient instrument readings as tables and graphs. All measured data collected with the anemometer can be stored, retrieved, or included in custom reports

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B018VO5GI2 |
| Batteries | 3 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | No |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #19,161 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Anemometers |
| Brand | Testo |
| Color | Black/Orange |
| Customer Reviews | 4.5 4.5 out of 5 stars (575) |
| Date First Available | February 22, 2016 |
| Global Trade Identification Number | 04029547014260 |
| Included Components | testo 405i hot-wire anemometer, 3 AAA batteries and certificate of conformity |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4.2 ounces |
| Item dimensions L x W x H | 7.87 x 1.18 x 1.61 inches |
| Item model number | 0560 1405 01 |
| Manufacturer | Testo |
| Material | Metal, Plastic |
| Measurement Accuracy | ±0.9 °F / ±0.5 °C |
| Number Of Pieces | 1 |
| Part Number | BAN7013006 |
| Product Dimensions | 7.87 x 1.18 x 1.61 inches |
| Size | small |
| Special Features | Measurement data is transmitted to the convenient and powerful testo Smart Probes App in your smart device, Measures air velocity, volume flow, and temperature, Measures in-duct air flow and automatically calculates volume flow (enter duct dimensions simply), Small dia. |
| Style | Wireless Smart Probe |
| Thickness | Not applicable Inches |
| Voltage | 4.5 Volts |

## Product Details

- **Brand:** Testo
- **Item Weight:** 4.22 Ounces
- **Item dimensions L x W x H:** 7.87 x 1.18 x 1.61 inches
- **Material:** Metal, Plastic
- **Voltage:** 4.5 Volts

## Images

![Testo 405i Smart Probe - 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 August 12, 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.

### ⭐⭐⭐⭐⭐ MUST HAVE FOR TAB PRO’S AND MECHANICAL PERFORMANCE VERIFICATION
*by B***N on January 11, 2026*

Used this on a very important project where they were low on cfm after i changed the configuration my report was within 2 cfm of the tab contractors device love it super easy and accurate MUST HAVE FOR HVAC AND TAB PRO’S

### ⭐⭐⭐⭐⭐ Awesome
*by S***T on July 11, 2024*

Awesome! Testo products are great. Very reliable tools!

## 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 Ecuador*
*Store origin: EC*
*Last updated: 2026-03-07*