Method for capacitive fluid level detection

Abstract

A method for fluid handling that includes reading information about a receptacle holder with an RFID reader and transmitting the information from an RFID transponder disposed on a first body of the receptacle holder that supports a fluid-containing receptacle. This information is used to align a robotic fluid transfer device with the first fluid-containing receptacle. Detecting a change in capacitance between an electrically conductive probe of the robotic fluid transfer device and an electrical ground or voltage source capacitively coupled to fluid contained in the first fluid-containing receptacle is an indication that the probe has contacted the fluid contained in the first fluid-containing receptacle. Once it is determined that the probe has contacted the fluid, the fluid transfer device aspirates a portion of the fluid contained in the first fluid-containing receptacle.

Dependencies are inferred from the claim text.