The Extech 407123 Heavy Duty Hot Wire Thermo-Anemometer is a powerful tool designed for precise measurement of air velocity and temperature. This thermo-anemometer is ideal for professionals in HVAC, industrial, and ventilation applications, providing accurate readings and a range of convenient features.The Extech 407123 features a telescoping probe that extends up to 2 ft, making it perfect for use in ducts and ventilating systems. This allows you to access confined spaces and hard-to-reach areas to obtain accurate measurements.This thermo-anemometer accurately measures air velocity and temperature, simultaneously displaying both parameters on its dual LCD screen. The dual display provides real-time monitoring of airflow conditions, allowing for immediate assessment and analysis.In addition to real-time measurements, the Extech 407123 includes convenient functions to enhance usability. The Data Hold function enables you to freeze the displayed reading, making it easier to record or take notes. The Min/Max measuring modes allow you to track the minimum and maximum values over a period of time, providing valuable information about airflow variations.The instrument also features a built-in RS-232 interface, which allows for easy connectivity to external devices such as computers. By utilizing the optional Data Acquisition software and cable, you can record and transfer measurements directly to a PC, facilitating data logging and analysis.The Extech 407123 Heavy Duty Hot Wire Thermo-Anemometer is designed to withstand demanding environments and offers a durable construction. It provides reliable and precise measurements of air velocity and temperature, making it an invaluable tool for professionals in various industries.