Extech RH490 Precision Hygro-Thermometer with Grains Per Pound (GPP) Display
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<b>[Product Information]</b><br>
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<li>Less than 30 second RH response time</li>
<li>Water Vapor in GPP and g/kg</li>
<li>Dual backlit display</li>
<li>Simultaneous display of Humidity/Temperature, Humidity/Dew Point or Humidity/Wet Bulb</li>
<li>Slim design with rubberized side grips</li>
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