Extech RH490 Precision Hygro-Thermometer Psychrometer

Highest 2% RH accuracy with Fast 30 second Response Time

• Dual backlit display
• Simultaneous display of:
• Humidity/Temperature
• Humidity/Dew Point
• Humidity/Wet Bulb
• Fast 30 second response time
• Slim design with rubberized sides for better grip and for one hand operation
• Measures Grains Per Pound (grams per kilogram) to 1120GPP (160g/kg)
• Complete with carrying case and 9V battery

• Humidity
• Wet bulb
• Dew Point
• Air Temperature
• External Probe Temperature measurements

• Humidity 0 to 100%RH
• Temperature (Internal) -22 to 199°F (-30 to 100°C)
• Basic Accuracy ±2%RH, ±1.8°F/1°C
• Max. Resolution 0.1%RH, 0.1°F/°C
• Dewpoint -22 to 199°F (-30 to 100°C)
• Wet Bulb 32 to 176 °F (0 to 80°C)
• Absolute Humidity 0 to 1120GPP (0 to 160g/kg)
• Dimensions 7.8×1.7×1.3″ (200x45x33mm)
• Weight 7oz (200g)

• Extech RH490 Data Sheet.pdf
• Extech RH490 User’s Manual.pdf