Li-thermometers le likhakanyo tsa khatello ke lisebelisoa tse peli tsa bohlokoa bakeng sa litanka tsa polokelo ea sepakapaka le khatello, 'me li phetha karolo ea bohlokoa ho tsona.
Li-gauge tse fapaneng tsa khatello li sebelisoa ho beha leihlo maemo a mokelikeli ka har'a lijana tse koetsoeng.
Sekala sa khatello: Ho laola le ho shebella khatello ea tanka ea polokelo, mochine oa ho lekanya khatello o lokela ho kenngoa tanka ea polokelo.
