The HPSA1500 ESC is a MEMS (Micro Electronic Mechanical System), that converts the pressure hemodynamic waveform into electrical signal which can be displayed on the monitor or used for further signal processing. Standard HPSA1500 ESC configuration consists of piezo resistive pressure sensor with attached calibrated and compensated components, electrical connections: Excitation – supply voltage (2 contacts) and output – electrical response proportional to the excited pressure (2 contacts).