由于濕度(du)(du)(du)測量裝置一般只(zhi)能(neng)用在工作(zuo)溫(wen)(wen)(wen)(wen)度(du)(du)(du)為(wei)0-100℃的設備中(zhong)，超過(guo)這個溫(wen)(wen)(wen)(wen)度(du)(du)(du)范(fan)圍，水(shui)會凝固成(cheng)冰(bing)或者完全蒸發成(cheng)水(shui)蒸氣。目前實驗室中(zhong)使(shi)用的快(kuai)速溫(wen)(wen)(wen)(wen)變試(shi)驗箱的溫(wen)(wen)(wen)(wen)度(du)(du)(du)范(fan)圍為(wei)-40~150℃，已(yi)超過(guo)了(le)0~ 100℃溫(wen)(wen)(wen)(wen)度(du)(du)(du)范(fan)圍，普(pu)通的應(ying)用在0- 100℃溫(wen)(wen)(wen)(wen)度(du)(du)(du)范(fan)圍下的干(gan)濕球濕度(du)(du)(du)計(ji)已(yi)不能(neng)使(shi)用。于是(shi)我們(men)對(dui)溫(wen)(wen)(wen)(wen)度(du)(du)(du)計(ji)作(zuo)了(le)一些改(gai)(gai)進，便可(ke)以把這種改(gai)(gai)進型的濕度(du)(du)(du)計(ji)用于寬溫(wen)(wen)(wen)(wen)度(du)(du)(du)范(fan)圍的快(kuai)速溫(wen)(wen)(wen)(wen)變試(shi)驗箱上。

    在(zai)快(kuai)速溫(wen)(wen)(wen)變試驗箱中，我們利用(yong)(yong)干濕(shi)(shi)球(qiu)測(ce)濕(shi)(shi)原理，制作(zuo)了一(yi)個可(ke)用(yong)(yong)于(yu)溫(wen)(wen)(wen)度(du)范圍在(zai)-40~150℃使(shi)用(yong)(yong)的濕(shi)(shi)度(du)測(ce)量裝置。在(zai)普通干濕(shi)(shi)球(qiu)濕(shi)(shi)度(du)計(ji)的基礎上(shang)增加(jia)了一(yi)個可(ke)轉(zhuan)動不銹鋼(gang)(gang)(gang)鋼(gang)(gang)(gang)蓋，在(zai)使(shi)用(yong)(yong)濕(shi)(shi)度(du)計(ji)時，把鋼(gang)(gang)(gang)蓋擰運到水(shui)(shui)(shui)槽打開的位置，再在(zai)濕(shi)(shi)球(qiu)溫(wen)(wen)(wen)度(du)計(ji)上(shang)放(fang).上(shang)紗布，就(jiu)可(ke)以在(zai)0~100℃的溫(wen)(wen)(wen)度(du)環(huan)境中測(ce)量濕(shi)(shi)度(du)，如圖a所示(shi)。如果(guo)溫(wen)(wen)(wen)度(du)不在(zai)0~100℃時，就(jiu)取下紗布，并擰動鋼(gang)(gang)(gang)蓋，轉(zhuan)動到水(shui)(shui)(shui)槽關閉的位置，如圖b所示(shi)。如果(guo)使(shi)用(yong)(yong)的環(huan)境溫(wen)(wen)(wen)度(du)低于(yu)0℃，水(shui)(shui)(shui)便會結(jie)成(cheng)冰。如果(guo)使(shi)用(yong)(yong)的環(huan)境溫(wen)(wen)(wen)度(du)高(gao)于(yu)100℃，水(shui)(shui)(shui)又會蒸發(fa)成(cheng)水(shui)(shui)(shui)蒸汽，此時需要(yao)擰動鋼(gang)(gang)(gang)蓋，把水(shui)(shui)(shui)槽關閉，鋼(gang)(gang)(gang)蓋在(zai)高(gao)溫(wen)(wen)(wen)加(jia)熱后，其內氣(qi)壓升高(gao)，會阻(zu)止水(shui)(shui)(shui)流流向水(shui)(shui)(shui)槽。