• Dual display for humidity and temperature
• Max/Min memory
• °F/°C switchable
• Large digit display
• Pen shaped design
• Pocket clip
• 3% accuracy
• Handy HVAC tool

For everyday home use or as a professional tool, our new RT819 Temperature/Humidity Pen performs. It measures temperature and humidity with a big digit display in a convenient size.

Slide the RT819 into your pocket for quick temperature and humidity checks around home, in the restaurant, or on the factory floor. Record Min and Max with ease so you’ll always know where the ambient conditions have been.

You won’t find a thermo-hygrometer in a more convenient package. Buy direct from ThermoWorks and we’ll ship your order out the same day.

Specifications	Temperature	Humidity
Range	32 to 122°F / 0 to 50°C	20 to 95% RH in 59 to 122 °F / 15 to 50°C range 25 to 95% RH in 41 to 122 °F / 5 to 50°C range 30 to 95% RH in 32 to 122 °F / 0 to 50°C range
Accuracy	±2°F / ±1°C	±3%
Resolution	0.1°	1%
Update	6 seconds
Battery	1.5 volt, type AAA x 1 piece
Display	2 (W) x 0.5 (H) inches 52 (W) x 13 (H) mm
Dimensions	0.9 (W) x 5.4 (H) x 0.8 (D) inches 23(W) x 138 (H) x 20(D) mm
Data Sheet	Click to download PDF