Testo Testo 405 NTC, Thermal 10m/s Max Air Velocity Air Velocity, Temperature, Volume Air Flow Anemometer

  • RS Stock No. 227-826
  • Mfr. Part No. 0560 4053
  • Brand Testo
Technical Reference
Legislation and Compliance
RoHS Status: Not Applicable
COO (Country of Origin): CN
Product Details

testo 405-V1 Mini Anemometer with Temperature

From Testo, the 405 thermal anemometer with a telescopic mount, designed for measuring air velocity, air temperature and volume flow. The micro-sized meter provides instant, accurate spot readings at ventilation ducts, windows, air grills and air outlets. Constructed from high-quality materials the robust anemometer is an ideal instrument for HVAC engineers, technicians, building controllers and installers.

Compact in design, the handheld anemometer uses a combination of hot-wire and NTC thermistor technology to deliver fast, reliable readings. The precise built-in sensors are able to detect the most subtle differences in air flow. The 405 anemometer records the flow speed, calculates the volumetric flow and measures the temperature. With a measuring range of 0 to +10 m/s the meter can even be used at very low speeds. With a probe that extends up to 300mm and a fully rotational head, the instrument is ideal for applications where measuring space is limited or hard to reach.

Only one control button makes the Testo 405 thermal anemometer extremely easy to use. With minimal effort, the user can select the function to be measured, and the unit the data is to be shown. The illuminated display can be swivelled into any position ensuring collected readings can easily be read, even in low light conditions. Additionally, the 405 anemometer features an integrated sensor protection unit. The delicate velocity sensor is protected by a simple twist of the probe stem, the protective cap closes eliminating the ingress of dust or debris.

Features and Benefits

• Compact, robust housing
• Accurate rapid readings
• Easy to use
• Precision air velocity and NTC sensors
• Measures air velocity in m/s, the temperature in °C and volume flow in m³h (0- 99,990 range)
• Extendable telescopic handle with rotatable display
• Easy to read LCD Illuminated display
• Duct holder and multi-function clip for quick positioning
• Low battery warning
• Auto-off for battery conservation
• Powered by 3 x AAA batteries


Hot-wire anemometers are the perfect instrument for engineers and technicians looking to carry out tests and surveys on ventilation, air conditioning equipment. They are used for the measurement of airflow and temperature quickly and accurately. The information and data they provide are vital in a wide range of applications and environments. They are essential for reporting, forecasting, planning and most importantly health and safety. Some of the more common applications are

• HVAC system performance
• Environmental testing
• Air conveyors
• Clean rooms
• Air balancing


Q - Is there a recommended replacement battery?
A - Yes, the Testo 405 thermal anemometer uses a 3 x AAA batteries for its power supply. See RS part number 744-2209

Supplied with

batteries and instructions.

Attribute Value
Measurement Parameters Air Velocity, Temperature, Volume Air Flow
Maximum Air Velocity 10m/s
Best Air Velocity Accuracy ±5% + 0.3 m/s
Air Velocity Resolution 0.01m/s
Probe Type NTC, Thermal
Temperature Measurement Resolution 0.1°C
Best Temperature Measurement Accuracy ±0.5 °C
Power Source Battery
Battery Type AAA x 3
Battery Life 20 h
Dimensions 490 x 37 x 36mm
Weight 115g
Height 36mm
Model Number p Testo 405
Minimum Operating Temperature 0°C
Length 490mm
Maximum Operating Temperature +50°C
Width 37mm
12 In stock - FREE next working day delivery available
34 available from Europe for delivery within 2 working day(s).
Price Each
£ 99.00
(exc. VAT)
£ 118.80
(inc. VAT)
Per unit
1 +
Calibration Options:
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