Isibani senzwa yelanga sisebenzisa iphaneli yelanga ukushaja ibhethri elishajekayo. Lapho ilanga likhanya ngokugqamile, iphaneli yelanga ikhiqiza amandla amanje kanye ne-voltage ukushaja ibhethri. Ebusuku, amandla okukhipha ibhethri ekulayishweni alawulwa amaswishi e-infrared ahlakaniphile ne-optical.
Lokhu kuyinhlanganisela yama-multiple probes isibani sokungeniswa kwe-LED, isibani sokungenisa amaningana singaba esivamile, sishintshashintshane.