The testo 425 hot wire anemometer provides incredible accuracy and is easy to use. The telescoping handle of this CFM meter extends to 33 inches, putting even high-up ductwork within reach. The testo 425 anemometer is ideally suited for low flow and velocity applications, and provides accurate, fast, and easy readings.

• Min/Max/Average values make comparisons fast and easy
• Compact thermal sensor is ideal for in-duct readings
• Measures air velocity from 0 to 4000 FPM
• Bright backlit display provides easy viewing in any environment