

Extech 44550 Pocket Humidity/Temperature Pen
The Extech 44550 is a slim, pocket-size pen-style instrument that simultaneously displays relative humidity and ambient temperature. It offers compact portability combined with essential functions such as Max/Min memory, dual °C/°F display, and a CLEAR function to reset stored extremes. With measurement ranges suited for indoor environments, it is ideal for quick checks in HVAC, building inspection, or environmental monitoring.
Description
The 44550 Pocket Humidity/Temperature Pen is engineered for users who need fast, reliable readings of humidity and temperature in a compact form. It features built-in sensors that measure relative humidity from 20 % to 90 % RH (with ±5 % RH accuracy) and temperature from –10 °C to 50 °C (14 °F to 122 °F, with ±1 °C/±2 °F accuracy). The device’s dual LCD displays humidity and temperature simultaneously, and the temperature display can be toggled between Celsius and Fahrenheit. It supports a Max/Min memory function to recall the highest and lowest readings since power-up, and includes a CLEAR button to reset those stored extremes. The pen includes a pocket clip and is powered by a single LR44 button battery. Its lightweight, slim profile makes it convenient for fieldwork and spot checks in various settings.
Features
- Measurement of relative humidity (20 % to 90 % RH) with ±5 % RH accuracy
- Measurement of temperature (–10 °C to 50 °C / 14 °F to 122 °F) with ±1 °C / ±2 °F accuracy
- Dual LCD display shows humidity and temperature simultaneously
- °C / °F selectable for temperature display
- Max/Min memory to record the highest and lowest values
- CLEAR function to reset Max/Min readings
- Compact pocket form factor with a pocket clip for portability
- Single button battery (LR44) operation
- Quick response time suitable for spot measurements
- Lightweight and slim design for ease of use in field or indoor environments
Includes
- Pocket clip
- One LR44 button battery

