An daidaita sandar auna tsayin roba mai zagaye da aka yi da sikeli. Babban sandar kariya an yi ta ne da bututun fiber na gilashin epoxy mai ƙarfi. Samfurin yana da kyawawan halaye na lantarki da na inji. Sandar auna tsayin tana da sauƙin nauyi kuma tana da sauƙin aiki, tana iya auna tsayin layin wutar lantarki na sama da layin sadarwa daga ƙasa. Daidaita saman samfurin a bayyane yake kuma daidai ne, kuma kuskuren aunawa bai gaza 5cm ba.