User Guide

Features:
• Less than 30 second RH response time
• Water vapor in GPP (g/kg)
• Dual backlit display
• Simultaneous display of:
Humidity or GPP (g/kg) plus Temperature
Humidity or GPP (g/kg) plus Dew Point
Humidity or GPP (g/kg) plus Wet Bulb
• Slim design with rubberized sides for
better grip and for one hand operation
• Data Hold and Min/Max functions
• Auto power off with disable and low battery indicator
• Complete with carrying case and 9V battery
Precision Hygro-Thermometer
Highest 2% RH accuracy with Grains Per Pound (GPP) and Grams per Kilogram (g/kg) Display
Ordering Information:
RH490 ..............Precision Hygro-Thermometer
Specifications
Humidity 0 to 100%RH
Temperature (internal) -4 to 199°F (-20 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 7.8x1.7x1.3" (200x45x33mm)
Weight 7oz (200g)
Product DATASHEET
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com