Extech 445580 Compact Hygro-Thermometer

The Extech 445580 Compact Hygro-Thermometer comes in 2 versions: Standard or NIST certified calibration. Pick your options above to open the exact model, with its own price and details. The details below are for the Standard version.

The Extech 445580 Humidity and Temperature Pen is a compact and reliable digital hygro-thermometer, ideal for professionals who need fast and accurate environmental readings in the field. Its lightweight design makes it easy to carry in a pocket or tool kit, making it a perfect companion for fieldwork, agriculture, construction, and environmental monitoring.

This compact tool measures both temperature and relative humidity with a simultaneous display on a clear digital screen. It can track temperature readings from 14°F to 122°F (-10°C to 50°C) and relative humidity from 10% to 90%, providing critical data for evaluating air conditions. The built-in memory function stores maximum and minimum values, while the data-hold feature lets users freeze readings for easy reference.

A self-calibration utility allows for field calibration when used with optional calibration bottles, ensuring long-term accuracy. The 3V lithium battery provides lasting power, and the included pocket clip enhances portability and convenience.

What's Included:

• 1 - Pocket Clip
• 1 - 3V Lithium Battery

Features

Compact and Portable
Lightweight and slim design allows for easy storage in a pocket or tool bag, ideal for mobile professionals.

Simultaneous Display
Shows both temperature and relative humidity readings at the same time for efficient data collection.

Wide Measurement Range
Measures humidity from 10% to 90% RH and temperature from 14°F to 122°F, covering a broad range of environments.

Field Calibration Capability
Features a built-in self-calibration utility compatible with RH calibration bottles for maintaining measurement accuracy.

Memory and Data Hold Functions
Stores maximum and minimum readings and includes a data-hold button to capture fluctuating values.

Long Battery Life
Operates on a 3V lithium battery for extended use in the field without frequent replacements.

Professional Applications
Ideal for environmental monitoring, HVAC inspections, agricultural work, and more.

What's Included

Included with Your Purchase:

• 1 - Pocket Clip
• 1 - 3V Lithium Battery

Specifications

• Temperature Range: 14°F to 122°F (-10°C to 50°C)
• Humidity Range: 10% to 90% RH
• Display: Simultaneous temperature and humidity
• Battery Type: 3V lithium battery
• Memory Function: Max/Min readings
• Data Hold: Yes
• Calibration: Self-calibration utility (requires calibration bottles)
• Dimensions: Compact pen-style form factor
• Model Number: 445580
• Condition: New
• UPC: 793950455807

FAQ

Q: What is the temperature range this device can measure?
A: It can measure temperatures from 14°F to 122°F (-10°C to 50°C).

Q: Does this hygrometer need calibration?
A: It includes a self-calibration utility and supports calibration using optional RH calibration bottles.

Q: Can I use this outdoors?
A: Yes, the compact design and durable construction make it ideal for field and outdoor use.

Q: What power source does it use?
A: It operates on a single 3V lithium battery, which is included.

Resources

Documents:

• Extech 445580 Datasheet
• Extech 445580 Manual