Testo 425 Hot Wire Anemometer

Introduction of Testo 425

Order-Nr. 0560 4251

The testo 425 hot wire anemometer is an advanced and user-friendly instrument designed for precise measurement of airflow velocity, volume flow, and temperature. This compact, handheld device is ideal for HVAC technicians, facility managers, and professionals who need to assess ventilation systems, air ducts, and environmental conditions with accuracy and ease.

The testo 425 hot wire anemometer is a versatile and reliable tool that offers precise airflow and temperature measurements. Its advanced features, user-friendly design, and robust construction make it an essential instrument for professionals tasked with maintaining and optimizing environmental conditions in various settings.

Testo 425 Key Features

• Temperature and flow measurement as well as volumetric flow calculation
• Permanently attached extendible telescopic probe – maximum length 820 mm, diameter 7.5 mm
• With single and multi-point averaging
• Hold function, display of min/max value, Auto-off function

Testo 425 Specifications

Parameter	Specification
Temperature – NTC
Measuring Range	-20 to +70 °C
Accuracy	±0.5 °C (0 to +60 °C)
	±0.7 °C (Remaining Range)
Resolution	0.1 °C
General Technical Data
Weight	285 g
Dimensions	182 x 64 x 40 mm
Operating Temperature	-20 to +50 °C
Product-/Housing Material	ABS
Battery Type	9V block battery, 6F22
Battery Life	20 h
Storage Temperature	-40 to +70 °C
Velocity - Thermal Anemometer
Measuring Range	0 to +20 m/s
Accuracy	±(0.03 m/s + 5 % of mv)
Resolution	0.01 m/s