Collection of electrical measurements on an FET based biosensor. Electrical signal changes were measured upon exposure of modified Silicon nanowire semiconductor channel to WT and CAR T-cells. All electrical measurements were carried out on a microprobe station using a source-meter-unit (Keithley 2604B) controlled by a Matlab program. Measurements from different devices on two different chips are enclosed in the folder in Matlab readable files together with the processing script. Fluorescent Microscope images and video recordings of the cells on the sensor are also enclosed.