Systems and methods for providing an estimate of a population of passive Radio Frequency Identification sensors in a coverage area of an RFID reader system are disclosed. In preferred embodiments, the toxic protein is a ribonuclease that has been modified to make it toxic to target cells and that can be conjugated to a target cell-specific delivery vector, such as an antibody, for delivery to pathogenic cells. In the preferred embodiment the vertical member is adjusted by concentric tubular members and locking in position by a pair of pins through aligned holes. Current input patterns from use of the terminal device are detected. The central processing unit determines whether there is leakage from the pipette P, and displays a judgment result on a display unit. The invention further includes a method of using the safety sleeve in conjunction with a wireline connection assembly.