Keeb kwm ntawm Thermohygrometers

Lub hygrometer yog ib qho cuab yeej ntsuas cov av noo ntawm cov pa ib puag ncig. Humidity sawv cev rau cov dej vapor ntsiab lus hauv cov roj, muab faib ua cov av noo thiab txheeb ze av. Cov av noo tsis txaus yog hais txog cov ntsiab lus ntawm cov dej vapor hauv cov roj, ntsuas hauv grams ib cubic meter. Tus txheeb ze humidity yog hais txog qhov piv ntawm cov dej vapor ntsiab lus hauv cov pa rau cov dej vapor ntsiab lus thaum cov dej vapor hauv cov pa mus txog lub xeev saturated nyob rau hauv tib lub xeev, qhia raws li RH (%).

The "Historical Records" records a scale device with soil and charcoal placed on both sides of the scale. The book "Huainanzi" describes this device: when the weather is dry. When the charcoal is light, the balance tilts toward the soil; when the weather is humid, the charcoal becomes heavier, and the balance tilts toward the charcoal. This is the earliest measurement of air humidity.

Thawj hygrometers nyob rau hauv cov teb chaws Europe tau tshwm sim nyob rau hauv lub xyoo pua 15th, thaum ib tug Italian invented ib txoj kev ntsuas av. Txoj kev no yog tib yam li lub hauv paus ntsiab lus ntawm kev siv cov khoom sib npaug hauv Suav teb. Muab ib lub pob ntawm cov paj rwb qhuav rau ntawm ib qho kawg ntawm qhov sib npaug, thiab tom qab ntawd muab ib qho hnyav ntawm tib qhov hnyav rau ntawm qhov kawg. Thaum cov paj rwb absorbs dej vapor nyob rau hauv cov huab cua, nws yuav tog, thiab qhov seem yuav qaij mus rau paj rwb. Tus nqi ntawm cov vapor hauv huab cua tuaj yeem txiav txim siab raws li qhov ntau npaum li cas dej vapor cov paj rwb absorbs.

Cov hygrometers siv xws li cov plaub hau hygrometers, ntub thiab qhuav qhov muag teev hygrometers, lithium chloride hygrometers, thiab lwm yam. Cov ntsiab lus txawv, tab sis lawv txhua tus ntsuas txheeb ze av noo.

Mini LCD Digital Air Temperature Humidity Meter Thermometer Hygrometer Gauge Tester