à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسÀÙÁÔ à·ÍÃìâÁÁÔàµÍÃì à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ à¤Ã×èͧÇÑ´áÅкѹ·Ö¡ Thermometer > Precision Hygro-Thermometer à·ÍÃìâÁÁÔàµÍÃì RH490 ¤Ø³ÅѡɳТͧ à·ÍÃìâÁÁÔàµÍÃì thermometer à¤Ã×èͧÇÑ´ÍسËÀÙÁÔPrecision Hygro-Thermometer à·ÍÃìâÁÁÔàµÍÃì RH490 Precision Hygro-Thermometer Highest 2% RH accuracy with Grains Per Pound (GPP) Display Less then 30 seconds of RH response time Water vapor in GPP Dual backlit display Simultaneous display of: Humidity/Temperature Humidity/Dew Point Humidity/Wet Bulb Slim design with rubberized side grips Data Hold and Min/Max functions Specifications Humidity 0 to 100% RH Temperature -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 7.81x1.7x1.3" (200x45x33mm) Weight 7oz (200g) à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسÀÙÁÔ à·ÍÃìâÁÁÔàµÍÃì à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ à¤Ã×èͧÇÑ´áÅкѹ·Ö¡ Thermometer > Precision Hygro-Thermometer à·ÍÃìâÁÁÔàµÍÃì RH490