Measuring sensor, in particular of a level of a liquid, in particular for the lubricating oil of an internal combustion engine, the sensor comprising a body with a longitudinal extension with at least one related intermediate portion having cylindrical symmetry with respect to said longitudinal extension and a bushing internally complementary to said intermediate portion, so that said body can freely rotate in the bushing with respect to said longitudinal extension and wherein the bushing externally comprises fixing means for fixing the sensor to an opening of a container of said liquid.

A liquid level sensor package for a replaceable print liquid reservoir, the package including a number of heater circuits, each heater circuit including a heater element to dissipate heat and a number of control devices, each control device individually controllable to be electrically connected to the heater element, the heater element to dissipate a different amount of heat when electrically connected to different ones of the control devices.

A fluid (oil) storage tank is often in a remote place. A temperature sensor strip is affixed vertically down the outside of the tank. Each sensor sends its electronic signature and temperature to a local microprocessor. Various types of computations yield an accurate level indication on a local display, all powered by a car battery, solar panel or power supply. Data can be sent remotely as well. For explosive environments only a small processor is powered adjacent the tank. Then a second processor has the power to compute and analyze the raw temperature data and display it at a safe distance from the tank with only a twisted pair of low volt wires reaching the tank. Other non-explosive tanks such as a water tank can use a signal processor adjacent the strip for all data collection, computing and display functions.

A liquid level meter includes a first resistive temperature detector; a first temperature measuring body a liquid level detection section a temperature detection section detecting the temperatures of the first resistive temperature detector and the first temperature measuring body; a current control section determining a value of a current to apply to the first resistive temperature detector such that a difference between the temperatures of the first resistive temperature detector and the first temperature measuring body detected by the temperature detection section to be a first constant value; and a power supply unit supplying a current of the determined current value to the first resistive temperature detector; wherein the liquid level detection section determines whether the first resistive temperature detector is present in a liquid or outside of the liquid using the value of the current applied to the first resistive temperature detector.

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 liquid level sensor package for a replaceable print liquid reservoir, the package including a substrate, a surface layer to contact a print liquid in the print liquid reservoir, and a layer stack including a number of metal layers disposed between the substrate and the surface layer. An array of heater elements disposed in one of the metal layers of the layer stack, and an array of thermal sensors disposed in a different one of the metal layers of the layer stack, each thermal sensor corresponding to a different heater element of the array of heater elements, and each thermal sensor to provide indication of a presence or absence of print liquid based on a sensed temperature after being heated by the corresponding heater element.

A liquid level sensor package for a replaceable print liquid reservoir, the package including a number of heater circuits, each heater circuit including a heater element to dissipate heat and a number of control devices, each control device individually controllable to be electrically connected to the heater element, the heater element to dissipate a different amount of heat when electrically connected to different ones of the control devices.

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.

In some examples, a liquid container comprises a chamber forming a volume containing a liquid, an elongated strip extending into the volume containing the liquid, a plurality of heaters supported by the strip along the strip, and a plurality of temperature sensors supported by the strip along the strip. The temperature sensors output signals indicative of dissipation of heat from the heaters to indicate a level of the liquid in the volume.

A method that configures a liquid-level transmitter device to generate a measured value for a level of a liquid. The method includes steps to correct for changes in physical properties of one or more components of the device. In one embodiment, the method utilizes a correction value that incorporates data from a temperature sensor disposed inside of the device, for example, inside of the electronics member.