The tool is an instrument including a filament which is brought into contact with an individual to test sensory perception of the individual. A latching mechanism of the frame includes latching members at a distal end of each of the attachment arms for releasably seating the electronic component between the attachment members. The non-critical sections are implemented with regular VT,, or low leakage transistors. The second gain is higher than the first gain. A column assembly which includes a plurality of the columns which may be connected in parallel to each other.