PT6508 Temperature Humidity Meter, Digital Thermometer Hygrometer Monitor with Ambient, Dew Point, Wet Bulb for Indoor/Outdoor MIN, MAX, Data Hold, LCD Backlight

i used this tool to verify that i in fact would benefit from installing a very expensive Aprilaire 800 humidifier ( with the installation it was over 2 thousand dollars ) …my worthelss Extech hygrometer ( the home model with big screen ) was telling me that all isn’t so bad but my cracked skin was telling me otherwise …this Protmex confirmed that my skin was telling me the truth and that humidity was abysmal – i went ahead with Aprilaire 800 installation and it was just game changing – no more sore throat, dry eyes, cracked skin etc …one annoyance is it always starts in Celsius and you have to press the button to switch to F … wish it remembered my preference.but it’s overall well made, 10 times more accurate than Extech and 100 times faster.Extech ( the home model with big screen ) would take about half an hour to stabilize on a ( wrong ) reading when moved from room to room. This unit takes maybe 30 seconds to stabilize on a good reading. When moving from room to room the reading starts changing literally within a second or two of entering a different room ! ! ! It is SO sensitive ! For example if you walk into a bathroom after somebody took a shower there the numbers will start climbing the very moment you walk into that room ! And about 30 seconds later they will pretty much stabilize at a new reading unless the temperature is also different. It takes longer ( about 5 minutes ) when there is a difference in room temperature.all in all outstanding for home use. don’t know if it’s good enough for professional use. [...]