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Hot Wire Anemometer

Key features

  • Brand: Testo
  • Product Model: Testo 425
  • Product Type: Thermo-Sensitive / Thermal Anemometer
  • Measurement Functions: Temperature, Wind Speed, and Air Volume Calculation
  • Application: Ventilation Ducts, Air-Conditioning Systems, and Airflow Checking
  • Display: Backlit Display for Easy Reading
  • Reading Hold: Supported
  • MAX / MIN Display: Supported
  • Mean Calculation: Multi-Point / Time Average Calculation
  • Probe Type: Telescopic Hot-Wire Probe
  • Probe Extension: Up to 820 mm
  • Probe Diameter: 7.5 mm
  • Ease of Use: Accurate Measurement and Easy to Use

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Main Function

The Testo 425 is designed for temperature and wind speed measurement and air volume calculation in ventilation and air-conditioning systems.

Key Product Information

Feature Details
Brand Testo
Product Model Testo 425
Product Type Thermo-sensitive / thermal anemometer
Measurement Functions Temperature, wind speed, and air volume calculation
Application Ventilation ducts, air-conditioning systems, airflow checking
Display Backlit display
Reading Hold Yes
Max / Min Display Yes
Mean Calculation Multi-point / time average calculation
Probe Type Telescopic hot-wire probe
Probe Extension Maximum extension up to 820 mm
Probe Diameter 7.5 mm shown
Ease of Use Accurate measurement and easy to use

Main Features

Feature Description
Temperature and Wind Speed Measurement Measures air temperature and wind speed accurately.
Air Volume Calculation Automatically calculates air volume for ventilation testing.
Backlit Display Makes readings clear and easy to read.
Hold Function Maintains the current reading for convenient viewing and recording.
Maximum / Minimum Display Displays maximum and minimum values directly.
Multi-point / Time Average Calculation Supports average calculation for more reliable airflow analysis.
Retractable Handle Telescopic probe helps measure airflow in ducts and hard-to-reach areas.
Portable Design Compact handheld design for field work and HVAC inspection.

Product Advantages

  • Temperature and wind speed measurement and air volume calculation
  • Accurate measurement and easy to use
  • Hold function, display maximum / minimum value
  • Backlit display for quick and clear readings
  • Telescopic hot-wire probe for duct testing
  • Suitable for ventilation and AC system inspection

Application Areas

Use Field Details
Ventilation Ducts Measures wind speed and air volume inside ducts
Air-Conditioning Systems Used for airflow testing and system performance checks
Indoor Air Quality Support Helps verify whether airflow is properly set
HVAC Maintenance Useful for technicians during inspection and balancing work

Functional Feature Highlights

1. Temperature and wind speed measurement and air volume calculation

Used for monitoring airflow in ventilation systems and calculating air volume.

2. Hold function, display maximum / minimum value

Keeps readings on screen and allows direct max/min display.

3. Multi-point / time average calculation

Supports averaging functions for better airflow analysis.

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