The pressure sensor assembly has at least one pressure sensor at its distal end, the pressure sensor having electrodes which are connected through spaced leads to output terminals at a proximal end of the assembly. The handle has a circuit board with a terminal corresponding to each output terminal on the sensor assembly, and a slot for receiving the proximal end of the sensor assembly and for aligning such assembly with each of its output terminals adjacent the corresponding terminal on the circuit board. The handle also includes a member for applying pressure to the sensor assembly and control means which operate in conjunction with the sensor-ok trace on a sensor assembly to detect when good electrical contact is being made between the terminals of the sensor assembly and the corresponding terminals of the handle circuit board, and for receiving and suitably outputting pressure measurements from the sensor.