Testo 405 Digital Mini Anemometer Hot-Wire Probe 0-10 m/s 99,990 m3/h

Description

Product Overview

The Testo 405 Digital Mini Anemometer is engineered for professionals who demand reliable, high‑resolution airflow data in compact form. Built around a telescoping hot‑wire probe, the instrument can be extended into ducts, vents, and narrow passages to capture real‑time velocity measurements ranging from 0 to 10 meters per second. The probe also calculates volumetric flow up to 99,990 cubic meters per hour, providing a comprehensive view of air movement in HVAC, cleanroom, and industrial ventilation applications.

Beyond velocity and volume, the device integrates a temperature sensor that records ambient conditions from –20 °C to +50 °C, allowing users to correlate temperature shifts with airflow changes. The LCD display presents all three parameters simultaneously, using large, high‑contrast digits that remain legible even in bright workshop lighting. The meter body swivels 360 degrees, ensuring that the user can view readings from any angle without needing to reposition the instrument.

Durability is a core design principle. The housing is constructed from impact‑resistant ABS plastic, while the internal electronics are sealed against dust and moisture. A protective cap covers the hot‑wire sensor when not in use, preventing contamination and extending probe life. The device weighs only 6.4 ounces, making it easy to carry between job sites or mount on a tool belt for hands‑free operation.

Technical specifications include a compact footprint of 19.29 × 1.46 × 1.42 inches, a battery life of up to 200 hours on a single AA battery, and compliance with IEC 61010‑1 safety standards. The instrument is calibrated at the factory and comes with a calibration certificate, ensuring traceability and confidence in every measurement.

Usage

Designed for HVAC technicians, indoor air quality specialists, and industrial maintenance engineers, the Testo 405 excels in environments where space is limited but measurement accuracy cannot be compromised. Whether you are inspecting ductwork in a commercial building, verifying airflow in a laboratory cleanroom, or troubleshooting ventilation in a manufacturing plant, the hot‑wire probe can be inserted through small access ports to capture data without dismantling the system.

Field use is straightforward: press the single button to power on, extend the probe to the desired length, and position it perpendicular to the airflow direction. The device automatically records velocity, calculates volumetric flow based on the duct cross‑section entered via the menu, and displays temperature. Data can be logged manually or transferred via the optional Testo data logger for later analysis, making it suitable for both spot checks and long‑term monitoring projects.

Because the instrument is lightweight and ergonomically balanced, it can be used for extended periods without causing user fatigue. The intuitive interface reduces training time, allowing new technicians to become proficient within a single shift. Its robust construction also means it can withstand the rigors of construction sites, outdoor inspections, and high‑humidity environments without performance degradation.

Why Choose Us

Testo AG has a reputation spanning over three decades for delivering precision measurement tools that meet international standards. The 405 Mini Anemometer benefits from this legacy, offering factory‑calibrated accuracy, a rigorous quality‑control process, and a network of service centers worldwide. When you purchase this instrument, you gain access to comprehensive technical support, firmware updates, and a one‑year warranty that covers defects in materials and workmanship.

Our commitment to user‑centric design is evident in the single‑button operation and the protective cap that shields the delicate hot‑wire element from contaminants. Unlike many competing models that require multiple steps to switch between measurement modes, the Testo 405 automatically cycles through velocity, flow, and temperature, reducing the chance of operator error and speeding up data collection.

In addition to the hardware advantages, Testo provides a suite of software tools that enable seamless data export to CSV or Excel formats, facilitating integration with building management systems and compliance reporting. This end‑to‑end solution—from measurement to analysis—makes the Testo 405 a cost‑effective choice for organizations seeking reliable airflow data without investing in multiple devices.

Key Features

• Telescoping hot‑wire probe reaches deep into ducts for accurate velocity and flow measurements.
• Integrated temperature sensor provides simultaneous ambient readings for comprehensive analysis.
• One‑button operation and swivel LCD ensure quick, ergonomic data capture in any orientation.
• Protective cap shields the sensor from dust and moisture, extending probe lifespan.
• Dedicated customer support and a one‑year warranty guarantee reliable performance and peace of mind.

FAQ

How does the hot‑wire probe measure airflow velocity?

The hot‑wire probe operates by heating a fine wire and measuring the rate of heat loss as air passes over it. Faster airflow removes more heat, causing a change in the wire’s resistance that the instrument translates into a velocity reading. This method provides high sensitivity and rapid response, making it ideal for low‑speed duct measurements.

Can the device calculate airflow volume for ducts of different sizes?

Yes. After measuring velocity, you can input the duct’s cross‑sectional area using the built‑in menu. The anemometer then multiplies the velocity by the area to compute volumetric flow in cubic meters per hour. This feature eliminates the need for separate calculators or manual conversions.

What maintenance is required to keep the probe accurate?

Regularly inspect the protective cap and clean the probe tip with a soft, lint‑free cloth to remove dust or debris. If the probe becomes contaminated, the sensor’s response may drift. Re‑calibration can be performed at an authorized service center, but the device is calibrated at the factory and typically remains accurate for years under normal use.

Is the instrument compatible with data logging accessories?

Absolutely. Testo offers optional data loggers that connect via the device’s USB port, allowing continuous recording of velocity, flow, and temperature. Logged data can be exported to PC software for trend analysis, compliance reporting, or integration with building automation systems.

What is the warranty coverage for the Testo 405?

The product comes with a one‑year limited warranty covering any defects in materials or workmanship. Should a malfunction occur, you can return the unit to an authorized Testo service center for repair or replacement. Extended warranty options are also available through select distributors.