Testo 425 NTC, Thermal Anemometer, 20m/s Max, Measures Air Velocity, Temperature, Volume Air Flow

This thermal anemometer from Testo measures the velocity and temperature of wind currents. It's easy to use by simply holding or placing the cylindrical probe in an exposed area to send readings along the cable to the device. The readings appear in large, legible numbers on the screen, which also has an LED (light-emitting diode) backlight for easy-to-see results. The four buttons on the device allow you to key in measurements and change settings for enhanced control and versatility.

• 9V battery offers a 20-hour life for long-lasting use
• Temperature resolution of +0.1°C and accuracy margin of ±0.7°C give you precise readings
• Maximum air velocity of 20m/s (metres per second) for use with fresh gales
• Broad operating temperature range of -20°C to +50°C for use in a variety of environments

• Scientific research
• Air conditioning engineers
• Harvest preparation

Yes, this anemometer has an auto-off feature to power down and conserve battery life when you're not taking readings. You can also turn off the backlight on the control pad to further conserve the battery.