â·ÃÊͺ¶ÒÁÃÒ¤Ò à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ à·ÍÃìâÁÁÔàµÍÃì à¤Ã×èͧÁ×ÍÇÑ´ > Thermometer à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ áººÁ×Ͷ×Í Heat Index Psychrometer RH25 à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ RH25 Heat Index Psychrometer Compact indoor/outdoor meter for measuring up to 6 environmental parameters Features : Built-in multiparameter sensor measures Heat Index, Wet Bulb Globe Temperature (WGBT), Humidity, Ambient Temperature, Temperature, Dew Point and Wet Bulb User Programmable Heat Index/WBGT alarm MIn/Max/Average Data Hold, Auto Power Off with disable Complete with CR2032 battery Specifications : Specifications Range Resolution Basic Accuracy Temperature -4 to 122ºF (-20 to 50ºC) 0.1ºF/C ±1ºF/0.6ºC Relative Humidity 0 to 99.9%RH 0.1%RH ±3%RH Wet Bulb -4 to 122ºF (-20 to 50ºC) 0.1ºF/C Dew Point -108.4 to 122ºF (-75 to 50ºC) 0.1ºF/C Heat Index -50.8 to 401ºF (-46 to 205ºC) 0.1ºF/C WBGT -13 to 130ºF (-25 to 54.5ºC) 0.1ºF/C Dimensions 5.5×1.4×0.7" (140×35×18mm) Weight 1.8oz (50g) Extech Psychrometer RH25 Thermometer à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ