The KAP-03 (KAP-03Ex) HARTfield communicator is a portable battery supplied device used for communication and exchange of data with smart transmitters e. g. pressure, differential pressure transmitters. It features an output built as a standard current loop 4-20 mA, using FSK modulation type BEL 202 with an implemented HART communication protocol revision 5 and revision 6. The communicator is specially designed to configure smart transmitters manufactured by APLISENS.