English Datasheet

Precision Hygro-Thermometer
Highest 2% RH accuracy
With Grains per Pound (GPP) and Grams per Kilogram (g/kg) measurement
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
Specifically designed for HVAC and
water damage restoration contractors
Specifications
Humidity
Temperature (Internal)
Basic Accuracy
Max. Resolution
Dewpoint
Wet Bulb
Absolute Humidity
Dimensions
Weight
0 to 100%RH
-22 to 199°F (-30 to 100°C)
±2%RH, ±1.8°F/1°C
0.1%RH, 0.1°F/°C
-22 to 199°F (-30 to 100°C)
32 to 176 °F (0 to 80°C)
0 to 1120GPP (0 to 160g/kg)
7.8x1.7x1.3" (200x45x33mm)
7oz (200g)
Ordering Information:
RH490 ..............Precision Hygro-Thermometer
RH490-NIST ....RH490 w/ Certificate of Calibration Traceable to NIST.
www.extech.com
Specifications subject to change without notice.
2/22/12 - R1
Copyright © 2008-2011 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.
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