I-Calcium ion sensors zizixhobo ezikhethekileyo ezenzelwe ukufumanisa kunye nokulinganisa uxinzelelo lwe-calcium ion (Ca²⁺) kwimimandla eyahlukeneyo. Ezi sensor zidlala indima ebalulekileyo kuluhlu olubanzi lwezicelo, ukusuka ekubekweni kwebhayoloji ukuya kwisayensi yendalo esingqongileyo. Iion yeCalcium ibalulekile kwiinkqubo ezininzi zomzimba, kubandakanya ukuncipha kwemisipha, ukukhutshwa kwe-neurotransmitter, kunye ne-coagulation yegazi.