Extech RH490 Thermohygrometer, ±2 %RH Accuracy, 100 °C Max, 100 %RH Max

The FLIR Precision Hygro-Thermometer is a high-accuracy device designed for HVAC professionals and water damage restoration contractors. With less than 30-second RH response time, it provides precise measurements of humidity, temperature, dew point, wet bulb, and water vapor levels.

• Provides highest 2% RH accuracy with Grains Per Pound (GPP) and Grams per Kilogram (g/kg) measurement
• Dual backlit display for easy reading in any lighting conditions
• Slim design with rubberized sides for better grip and one-hand operation
• Auto power off with disable and low battery indicator for prolonged battery life