Amagama athi "thermowell" nelithi "protection tube" avame ukusetshenziswa ekulinganisweni nasekulawuleni izinga lokushisa kwezimboni. Nakuba ukusetshenziswa kwabo kufana, kukhona umehluko phakathi kwalokhu okubili:

I-Thermowell:
I-thermowell iyishubhu evalekile efakwe kumkhumbi wenqubo noma ipayipi ukuze kuvikelwe inzwa yezinga lokushisa, njenge-thermocouple noma i-resistance temperature detector (RTD), kuketshezi lwenqubo. Ama-Thermowells avumela izinzwa zezinga lokushisa ukuthi zifakwe enqubweni kuyilapho ihlinzeka ngomgoqo ovikela inzwa ezimeni ezibolayo, ezilimazayo, noma zokucindezela okuphezulu koketshezi lwenqubo. Ama-Thermowell adizayinelwe ukuhlukanisa inzwa yezinga lokushisa endaweni yenqubo kuyilapho evumela ukukalwa okunembile kwezinga lokushisa.

Ishubhu lokuvikela:
Ishubhu eliyisivikelo, ngakolunye uhlangothi, liyishubhu noma i-sheath esebenza injongo efanayo ne-thermowell. Isetshenziselwa ukuvikela izinzwa zokushisa ezimweni ezinzima zenqubo, ezifana namazinga okushisa aphezulu, umoya oshisayo noma ama-abrasives. Amashubhu okuzivikela ngokuvamile asetshenziswa ezinhlelweni zokusebenza lapho ukuchayeka okuqondile kwenzwa yezinga lokushisa endaweni yenqubo kungase kubangele ukulimala kwenzwa noma ukufundwa kwezinga lokushisa okungalungile.

Ukufingqa, kuyilapho kokubili ama-thermowells namashubhu okuvikela esetshenziselwa ukuvikela izinzwa zokushisa, ama-thermowells ngokuvamile aklanywa anemikhawulo evaliwe futhi afakwe ezitsheni noma amapayipi, kuyilapho amashubhu okuvikela esebenza ngezindlela ezihlukahlukene futhi angasetshenziswa ezinhlelweni ezihlukahlukene. Ilungiselelwe ukuvikela inzwa yezinga lokushisa ezindaweni ezinokhahlo.