Ana amfani da wannan na'urar don daidaita bayanin martaba mai sanyi. Wutar lantarki mai motsi gaba-baya, daidaitawa mai kyau na sama- ƙasa dama-hagu.
Mai amfani na ƙarshe zai iya zaɓar tsayi daban-daban (2m/3m/4m) da tsarin tebur bisa ga ƙayyadaddun bayanan martaba daban-daban.
Muamfani