Layar Stevenson
Allon Stevenson ko matsuguni na kayan aiki tsari ne ko shinge ga kayan aikin yanayi akan hazo da hasken zafi kai tsaye daga tushen waje, yayin da yake barin iska ta yawo a kusa da su.  Yana samar da wani ɓangare na daidaitaccen tashar yanayi kuma yana riƙe da kayan aiki waɗanda zasu iya haɗa da ma'aunin zafi da sanyio (na yau da kullun, matsakaicin / mafi ƙarancin ), hygrometer, psychrometer, dewcell, barometer, da thermograph .

Hakanan ana iya sanin allon Stevenson a matsayin mafakar yankin auduga, matsugunin kayan aiki, matsugunin ma'aunin zafi da sanyio, ma'aunin zafi da sanyio, ko allon ma'aunin zafi. Manufarsa ita ce samar da daidaitaccen yanayin da za a auna zafin jiki, zafi, raɓa, da matsa lamba na yanayi. Fari ne mai launi don nuna hasken rana kai tsaye.

Tarihi 

omas Stevenson (1818-1887), injiniyan farar hula dan Scotland ne ya tsara shi wanda ya kera fitilun fitulu da yawa, kuma shine mahaifin marubuci Robert Louis Stevenson . Haɓaka ƙaramin allo na ma'aunin zafi da sanyio tare da bango mai kauri biyu a kowane bangare kuma ba a ba da rahoton wani bene a 1864.  Bayan kwatancen tare da sauran fuska a cikin United Kingdom, Stevenson na asali zane da aka gyara. 

Canje-canjen da Edward Mawley na Royal Meteorological Society yayi a 1884 ya haɗa da rufin rufin biyu, bene tare da allunan dalla-dalla, da gyare-gyare na louvers biyu.  Ofishin Kula da Yanayi na Biritaniya ne ya karɓi wannan ƙirar kuma daga ƙarshe sauran hidimomin ƙasa, kamar Kanada . Sabis na ƙasa sun haɓaka bambance-bambancen nasu, kamar ƙirar yankin auduga mai lu'u-lu'u a cikin Amurka .

Abun ciki 
Al'ada na Stevenson na al'ada shine siffar akwati, an gina shi da itace, a cikin zane-zane biyu.  Duk da haka, yana yiwuwa a gina allo ta amfani da wasu kayan aiki da siffofi, kamar dala. Hukumar Kula da Yanayi ta Duniya (WMO) ta amince da mizanin tsayin ma'aunin zafin jiki tsakanin  sama da ƙasa.

Girman 

Girman ciki na allon zai dogara da adadin kayan aikin da za a yi amfani da su. Allon daya na iya auna  da allon biyu  . Naúrar tana goyan bayan ta da ƙarfe huɗu ko ƙafafu na katako ko madaidaicin katako.

saman allon an samo asali ne da allunan asbestos guda biyu tare da sararin samaniya a tsakanin su. Wadannan allunan asbestos gabaɗaya an maye gurbinsu da laminate don dalilai na lafiya da aminci . An zana dukkan allon tare da wasu riguna na fari don nuna hasken hasken rana, kuma yawanci yana buƙatar sake yin fenti kowace shekara biyu.

Zaune 
Wurin zama na allon yana da matukar mahimmanci don guje wa lalata bayanai ta hanyar tasirin murfin ƙasa, gine-gine da bishiyoyi: shawarwarin WMO 2010, idan bai cika ba, tushe ne mai kyau.  Bugu da kari, Environment Canada, alal misali, ya ba da shawarar cewa a sanya allon aƙalla sau biyu nisan tsayin abu, misali,  . daga kowace bishiyar da ta kai  babba.

A yankin arewa, kofar allo ya kamata ta fuskanci arewa ta yadda za a hana hasken rana kai tsaye a kan ma'aunin zafi da sanyio. A yankunan polar da ke da hasken rana na sa'o'i ashirin da hudu, dole ne mai kallo ya kula da kare ma'aunin zafi da sanyio daga rana tare da kaucewa tashin zafin da zafin jikin mai kallo ke haifarwa.

Ana amfani da nau'i na musamman na allon Stevenson tare da kullun ido a kan rufin a kan jirgin ruwa. An rataye naúrar daga sama kuma tana tsaye a tsaye duk da motsin jirgin.

Nan gaba 
A wasu yankuna amfani da tashoshin yanayi na atomatik mai raka'a guda yana maye gurbin allon Stevenson da sauran kayan aikin yanayi na tsaye.[ <span title="This claim needs references to reliable sources. (January 2023)">abubuwan da ake bukata</span> ]

Manazarta

Hanyoyin haɗi na waje 

 Labari - Ma'aunin zafin jiki da allon Stevenson
 Misalin gidan da ba na al'ada ba wanda aka gina allon Stevenson

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