Gudbiyaha hal-channel-ka ah wuxuu u beddelaa tirada farsamada u beddela heerka caadiga ah ee hadda jira iyo soo saarista calaamadda danab, qiimaha iyo faa'iidada hagaajinta hawlaha.
Waxaa si toos ah loogu xidhi karaa qalabka gacanta ama kombiyuutarka:4-20mA, 0-10mA, 0-5V, 0-10V.