A method for indicating the level of a liquefied gas in a cryogenic tank having a resistance temperature detector (1). The controller applies a heating pulse to the detector and performs a single resistance measurement after the heating pulse. The overheating of the sensor and the time interval for the measurement are found in a separate set of test experiment. As a result, for temperature sensors with negative temperature coefficient, the resistance of the sensor in gas is below some unique characteristic value, which can be used like a threshold criterion to distinguish between the liquid and the gas in a wide temperature range. For sensors with positive temperature coefficient, the resistance of the sensor in gas is larger than some unique characteristic value, which can be used like a threshold criterion to distinguish between the liquid and the gas in a wide temperature range.

A sensor circuitry package for a replaceable print apparatus component including a plurality of sensing zones, each sensing zone including a number of sensing devices, each sensing device having a respective sensing function, and an array of memory elements, each memory element corresponding to a respective one of the sensing zones. During a sensing operation, the array of memory elements to serially load a segment of select bits, each select bit having one of a select value and a non-select value, a memory element having a select value to select a number of sensing devices of the respective sensing zone to be enabled to perform its respective sensing function.

A fluid sensor for impedance-based determination of a quantity or a quality, such as type, composition, or purity of a fluid present in the surroundings of the fluid sensor, where the fluid sensor includes a first electrically conductive electrode which is arranged on a first extruded substrate component made of an electrically insulating, thermally curable synthetic, and where the fluid sensor includes a second electrically conductive electrode which is arranged on a second extruded substrate component made of an electrically insulating, thermally curable synthetic, where in each case an electrically conductive surface both that of the first electrode and also of the second electrode is exposed in such a way that it is wettable by fluid in the surroundings of the fluid sensor.

A fluid sensor for impedance-based determination of a quantity or a quality, such as type, composition, or purity of a fluid present in the surroundings of the fluid sensor, where the fluid sensor includes a first electrically conductive electrode which is arranged on a first extruded substrate component made of an electrically insulating, thermally curable synthetic, and where the fluid sensor includes a second electrically conductive electrode which is arranged on a second extruded substrate component made of an electrically insulating, thermally curable synthetic, where in each case an electrically conductive surface both that of the first electrode and also of the second electrode is exposed in such a way that it is wettable by fluid in the surroundings of the fluid sensor.

The invention relates to devices for detecting the fill level of media in containers. The devices are distinguished, in particular, by a simple and reliable detection of the fill level. For this purpose, multiple measuring points, each consisting of a series circuit of a resistor and a p-n junction, are spaced apart from one another. Each measuring point is connected, on the one hand, to an input of a multiplexer. On the other hand, the measuring points are connected to a reference potential. The output of the multiplexer is connected to a control device, wherein the control device is a control device periodically supplying a voltage to the measuring point connected to the control device via the multiplexer and measuring the voltage drop, a control device determining the medium from the temperature-dependent forward voltages resulting from the different thermal properties of the medium and a control device ascertaining the fill level from the consecutive measuring points.

Device (1) for capacitive measurement of a filling level of a filling medium (2) in a filling volume (3) that can be filled with a filling medium, comprising: a first measuring element (5), a second measuring element (6), wherein the second measuring element (6) is created such that a potential gradient forms between a first portion (6a) of the second measuring element (6), and a second portion (6b) of the second measuring element (6); a voltage generation means (7) that is associated with the second measuring element (6) and is designed to generate a first electrical voltage (U.sub.1) and a second electrical voltage (U.sub.2) that is optionally different from the first electrical voltage (U.sub.1), and to apply these to the second measuring element (6); a control means (8) that is associated with the voltage generation means (7) and is designed to control the operation of the voltage generation means (7) such that the first and second electrical voltage (U.sub.1, U.sub.2) is applied in an alternating manner to the first and second portion (6a, 6b) of the second measuring element (6).

A logic circuitry package includes an interface to communicate with a print apparatus logic circuit and at least one logic circuit including at least one heater and a temperature sensor. The at least one logic circuit is configured to receive, via the interface, a heater command to address the at least one heater. The at least one logic circuit is configured to receive, via the interface, subsequent to the heater command, a sensor command corresponding to a sensor ID to address the temperature sensor. The at least one logic circuit is configured to transmit, via the interface, a digital value in response to the sensor command. The digital value corresponds to a print material level of a print material within a reservoir.

The present invention provides a system for measuring instantaneous inflow rate of liquid, comprising: a receptacle, comprising an opening at a top side, a nozzle at a bottom and/or multiple holes on the side section of said receptacle configured to receive the inflow of liquid from said top opening, and simultaneously release said liquid through said nozzles; a sensing device, configured to sense the level of liquid within the receptacle and produce signals indicative of the level of liquid in the receptacle; and a processor, configured to receive said signals, calculate the level of liquid in the receptacle according to said signals; and analyze said calculations, to obtain the instantaneous inflow rate of liquid.

The present invention provides a system for measuring instantaneous inflow rate of liquid, comprising: a receptacle, comprising an opening at a top side, a nozzle at a bottom and/or multiple holes on the side section of said receptacle configured to receive the inflow of liquid from said top opening, and simultaneously release said liquid through said nozzles; a sensing device, configured to sense the level of liquid within the receptacle and produce signals indicative of the level of liquid in the receptacle; and a processor, configured to receive said signals, calculate the level of liquid in the receptacle according to said signals; and analyze said calculations, to obtain the instantaneous inflow rate of liquid.

An implementation of the present teachings includes a resistor structure for measuring a level of a print material such as a liquid metal print material within a reservoir of a printer such as a magnetohydrodynamic printer. The resistor structure includes a first electrode and a second electrode that are physically and electrically separated from each other. When positioned within the reservoir, the liquid metal physically contacts the first electrode and the second electrode. An electrical resistance between the first and second electrodes changes depending on the level of the print material within the reservoir. As the level of the print material decreases, the electrical resistance between the first electrode and the second electrode increases. The electrical resistance can be measured and used to determine a level of the print material within the reservoir.