The Extech 445580 RH/Temperature Pen is a compact and reliable digital hygro-thermometer designed for professionals who need fast, accurate environmental measurements in the field. Its pen-style design makes it highly portable and easy to use, making it an excellent choice for building inspectors, and facility maintenance personnel.

Equipped with built-in temperature and humidity sensors, the 445580 measures relative humidity and temperature simultaneously, displaying both readings clearly on a dual LCD screen. This allows users to quickly assess environmental conditions without switching between modes. The device measures humidity from 10% to 90% RH and temperature from 14°F to 122°F (-10°C to 50°C), providing dependable performance across a variety of indoor and light industrial applications.

For added functionality, the meter includes max/min memory, enabling users to track the highest and lowest readings over time, as well as a data hold feature for freezing values on the display for easy recording. A built-in self-calibration utility, along with optional calibration references, ensures continued measurement accuracy.

Designed with convenience in mind, the lightweight unit features a pocket clip for easy transport and comes complete with a lithium battery for immediate use. Its straightforward operation and compact form factor make it ideal for quick spot checks or ongoing monitoring.

Durable, efficient, and easy to carry, the Extech 445580 RH/Temperature Pen is a practical solution for professionals who need reliable humidity and temperature measurements on the go.

Key Features

• Dual LCD display shows temperature and humidity simultaneously
• Measures 10–90% RH and 14°F to 122°F (-10°C to 50°C)
• Built-in sensors for convenient, real-time measurements
• Max/Min memory and data hold for capturing critical readings
• Compact, lightweight pen design with pocket clip for portability