testo 405i Bluetooth handheld anemometer CFM meter Black/Orange

Description

Product Overview

The Testo 405i is a premium handheld anemometer designed for professionals who demand accuracy and convenience in airflow measurement. Constructed from a durable combination of metal and high‑impact plastic, the device balances ruggedness with a lightweight feel, weighing just 4.22 ounces. Its compact dimensions—7.87 × 1.18 × 1.61 inches—allow it to fit into tight spaces, while the telescopic shaft extends up to 15 inches for hard‑to‑reach locations. Powered by three AAA alkaline batteries, the unit operates at 4.5 V and provides up to 150 hours of continuous use, ensuring reliable performance on the job site.

Equipped with Bluetooth 4.0, the 405i transmits real‑time data to the Testo Smart Probes app on iOS or Android devices. The app transforms raw measurements into clear tables and graphs, enabling users to store, retrieve, and export data for detailed analysis or compliance reporting. The anemometer’s hot‑wire sensor delivers a measurement accuracy of ±0.9 °F (±0.5 °C) for temperature and ±0.5 m/s for air velocity, meeting the stringent requirements of HVAC, clean‑room, and industrial applications.

Beyond basic airflow measurement, the 405i automatically calculates volume flow (CFM) when users input duct dimensions. This feature eliminates manual calculations, reducing the risk of human error and speeding up commissioning tasks. The device also supports in‑duct measurements, allowing technicians to assess airflow within ventilation systems without dismantling components. All specifications—including material composition, battery type, and measurement range—are clearly listed on the product label, ensuring full transparency for end users.

Usage

The Testo 405i excels in a variety of environments, from commercial HVAC installations to laboratory clean‑room monitoring. Its portable form factor makes it ideal for field service engineers who need to travel between multiple sites, while the Bluetooth connectivity ensures that data can be captured on a smartphone or tablet without the need for cumbersome cables. Whether you are balancing air distribution in a large office building, verifying ventilation rates in a manufacturing plant, or performing routine maintenance on residential air‑conditioning units, the 405i provides the flexibility required for accurate diagnostics.

Because the device is designed for both professional and DIY use, it offers an intuitive user interface with a clear LCD display that shows temperature, air velocity, and calculated volume flow simultaneously. The telescopic shaft, combined with the small diameter probe, enables measurements inside narrow ducts, vents, and grilles, making it a versatile tool for leak testing and system verification. The included accessories—three pre‑installed AAA batteries, a certificate of conformity, and a protective carrying case—ensure that users can begin measurements immediately out of the box.

In addition to HVAC applications, the 405i is suitable for environmental monitoring, such as assessing airflow in agricultural facilities, data centers, and clean‑room environments where precise control of air movement is critical. Its ability to store up to 500 measurement sets directly on the device, and then sync them to the app, provides a reliable audit trail for compliance with industry standards such as ISO 14644‑1.

Why Choose Us

Choosing the Testo 405i means selecting a product backed by a global leader in measurement technology. Testo’s reputation for quality is reinforced by rigorous factory testing, a comprehensive certificate of conformity, and a commitment to continuous software updates that keep the Smart Probes app compatible with the latest mobile operating systems. Each unit undergoes a multi‑stage calibration process to guarantee that the temperature and airflow readings meet the declared accuracy specifications.

Customer support is a cornerstone of the Testo experience. Owners of the 405i receive access to a dedicated technical helpline, online resources, and a community forum where they can share best practices and troubleshoot issues. The company also offers an extended warranty option, providing peace of mind for users who rely on the device for critical projects. In addition, Testo provides calibration services at authorized service centers worldwide, ensuring that the instrument remains accurate throughout its service life.

From a sustainability perspective, the 405i’s low power consumption and replaceable AAA batteries reduce environmental impact compared with larger, hard‑wired instruments. The device’s recyclable plastic housing and metal components meet EU RoHS directives, reflecting Testo’s commitment to responsible manufacturing. By investing in the 405i, customers receive a tool that not only delivers high‑performance measurements but also aligns with modern environmental standards.

Key Features

• Accurate hot‑wire sensor provides reliable air velocity and temperature readings for precise HVAC diagnostics.
• Bluetooth 4.0 connectivity streams data instantly to the Testo Smart Probes app for easy analysis and reporting.
• Telescopic shaft reaches up to 15 inches, allowing measurements in confined ducts and hard‑to‑reach locations.
• Automatic CFM calculation simplifies volume flow assessment when duct dimensions are entered.
• Comprehensive after‑sales support, including technical helpline, calibration services, and optional extended warranty.

FAQ

Can the Testo 405i measure airflow in both metric and imperial units?

Yes. The device allows users to switch between metric (m/s, °C, CFM) and imperial (ft/min, °F, CFM) units directly from the LCD menu, ensuring compatibility with regional standards and project specifications.

How often does the battery need to be replaced during typical use?

With standard usage—continuous measurements for up to 150 hours—the three AAA alkaline batteries typically last between 6 to 12 months. The device provides a low‑battery warning on the display, allowing users to replace the cells before performance is affected.

Is the Smart Probes app available for both iOS and Android?

Yes. The Testo Smart Probes app is compatible with iOS 12.0 or later and Android 6.0 (Marshmallow) or later, offering a seamless experience across most modern smartphones and tablets.

Can the 405i be used for leak testing in ventilation ducts?

Absolutely. The small‑diameter probe and telescopic shaft make it ideal for detecting airflow discrepancies and leaks within ducts, while the app’s data logging feature helps document findings for compliance reports.

What warranty does Testo provide for the 405i?

Testo offers a standard two‑year limited warranty covering manufacturing defects. Customers may purchase an extended warranty for additional coverage, and all warranty claims are handled through authorized service centers.