Patent ID: 6929343
Filing Date: 2005-08-16
Classification: B41J

Abstract:
1. A fluid supply, comprising: a body defining an interior volume configured to contain a fluid; a first electrode and a second electrode contained within the interior volume and configured to be in direct contact with the fluid, wherein the first electrode and second electrode are configured to be connected to external power supply circuitry for applying an alternating signal across the first and second electrodes, and wherein at least one of the first electrode and the second electrode has an elongate shape extending at least partially upwards from a bottom surface of the interior volume to enable the detection of a level of the fluid in the interior volume; and a first electrical contact in electrical communication with the first electrode and a second electrical contact in electrical communication with the second electrode, wherein the first electrical contact and second electrical contact are configured to be connected to the external power supply circuitry and to detector circuitry for determining a measured impedance value of the fluid to detect a characteristic of the fluid.