Sharaxaad Gaaban:

Beddelayaasha u dhowaanshaha birlabta waxaa ka mid ah badhanka u dhowaanshaha hadda ee eddy, badhanka u dhowaanshaha awoodda, badhanka u dhowaanshaha hoolka, badhanka u dhowaanshaha sawir-qaadista, badhanka u dhowaanshaha pyroelectric, badhanka magnetic TCK iyo badhanka kale ee u dhowaanshaha. Sababtoo ah dareemayaasha barakicinta waxaa lagu samayn karaa iyadoo la raacayo mabaadi'da kala duwan iyo hababka kala duwan, dareemayaasha barakicinta ee kala duwanna waxay leeyihiin habab "aragti" oo kala duwan oo loogu talagalay nasashada jirka, waxaa jira badhanka u dhowaanshaha ee caadiga ah ee soo socda: badhanka u dhowaanshaha socodka qoyan Beddelkan waxaa mararka qaarkood loo yaqaan badhanka u dhowaanshaha inductive. Waa isticmaalka walxaha gudbiya ee u dhow tan waxay abuuri kartaa goob elektromagnetic ah.