Screw plug mersion heaters li loketse bakeng sa ho futhumatsa metsi ka ho toba, ho kenyelletsa le mefuta eohle ea oli le tharollo ea ho futhumatsa mocheso. Lintho tse futhumatsang li na le hairpin e kobehileng 'me e ka kenngoa kapa e kenngoa ka har'a plug ea screw, ho itšetlehile ka sheath ea element le ho lumellana ha thepa ea plug.Libaka tse koaletsoeng ka morero ka kakaretso li na le libaka tse hahelletsoeng ka boikhethelo, tse thibelang mongobo, tse thibelang ho phatloha le liqhobosheane tse hanyetsanang le ho phatloha/mongobo tse fumanehang ho khotsofatsa litlhoko tse khethehileng tsa ts'ebetso.Li-thermostats tsa boikhethelo li fana ka taolo e bonolo ea mocheso ho heater plug ea ho qoelisa ea screw plug.