A variable inductance force transducer includes a variable inductor including an induction coil having a wire configured as a plurality of turns with a hollow center having an inner opening. An inner core is within the induction coil that can move in and out responsive to an applied pulling force to change its inductance depending on a magnitude of a pulling force applied to the inner core. A spring has an end for securing to a fixture and an opposite end secured to a first end of the inner core which has a second end opposite the first end having a coupling feature attached thereto for attaching a load which provides the pulling force.

An electromechanical fill-level measuring device comprising at least one displacement element, which is connected by means of a measurement wire windably at least with a measurement drum, at least one measuring shaft, with which the measurement drum is mechanically fixedly connected, wherein the shaft is held rotatably in at least one rotary bearing, at least one weight measuring system, which ascertains the effective weight of the displacement element and the measurement wire, and at least one servomotor, which is coupled with the measuring shaft and which rotates the measuring shaft corresponding to an ascertained weight measurement, so that an ascertaining of the relative movement of the measurement drum produced by a change of the liquid level to be measured is provided. The invention provides that a calibration mode of the weight measuring system of the electromechanical fill-level measuring device is provided, in which freely hanging displacement elements with defined mass are provided for ascertaining their weights on the measurement wire, after each change of the freely hanging displacement elements with defined mass a predefined rotational movement of the measurement drum is provided, and their ascertained weights are provided as a calibration values for the weight measuring system.

A method for the functional diagnosis of an electromechanical fill state measuring device in which a displacement element on a measuring wire is lowered into a filling material in a container such that in an equilibrium state, the weight of the displacement element minus a displacement element buoyancy, which depends upon at least one equilibrium volume, is determined to be equal to a resulting weight of the displacement element. The resulting weight is specified, and the specified resulting weight is kept constant by correspondingly changing the length of the measuring wire in the equilibrium state. The fill state of the filling material is ascertained using the length of the lowered measuring wire. In order to diagnose a function, the specified value of the equilibrium volume of the displacement element is changed, and the resulting change in the length of the measuring wire is ascertained on the basis of the constant equilibrium state of the resulting weight.

A depth measurement apparatus for measuring the depth of a hole and/or the depth of any liquid or slurry in the hole. The depth measurement apparatus comprises a spool containing a length of cord having a bob attached to a free end of the cord remote from the spool. The bob is a solid body, preferably being in the shape of a sphere, a spheroid or an ellipsoid. The apparatus has a measuring device arranged to measure a length of the cord dispensed from the spool during use, which indicates the depth of the hole. The measuring device is also arranged to measure the acceleration rate at which the cord is dispensed from the spool, wherein a change in the acceleration rate indicates that the bob has entered a liquid or slurry.

A probe end device for a cable probe including a measuring cable having a predeterminable cross section is disclosed. The probe end device includes a probe end body having a receiving opening for an end portion of the measuring cable, the receiving opening having a wall, which is set up to provide a progression of an end portion, which is inserted into the receiving opening, of the measuring cable, and the wall further being set up to space apart the end portion, which is inserted into the receiving opening, of the measuring cable from at least one boundary of the probe end body.

A toilet monitor uses a toilet tank water level sensor producing a toilet tank water level measurement signal. A processor detects rate of change of the measurement signal and conditionally produce a responsive actuation signal in response to the detected rate of change. A transducer connected to receive the actuation signal and transmit information, provide a humanly-perceptible indication, generate a data log and/or control an electronic water supply valve.

In a submersible liquid level sensing system, a submersible transducer senses hydrostatic pressure of a liquid in which the transducer is submerged. In at least one embodiment, a pump controller controls the on/off operation of a pump in accordance with the sensed liquid level, based on an output of the transducer. The sensed liquid level is output by the transducer to the pump controller via a cable, which is covered by a ruggedized jacket configured to be slid over the cable and attached to the transducer. The jacket may be de-attached from the transducer with the jacketed cable operably connected to the transducer.

An overfill indicator for a flexible collapsible liquid storage tank made of a liquid impervious fabric and having a floor and a top wall with a vent therein, the overfill indicator comprising a connector portion adapted to removably connecting to the vent of the tank, an indicator movably mounted to the connector portion, the indicator being moveable between a resting position and a visually noticeable alert position, a base portion located on the inside of the tank and on the floor thereof and aligned with the vent, and a linkage connecting the base to the indicator such that the indicator is moved from the resting position to the alert position as the top wall of the tank reaches a threshold distance from the floor as the tank is filled with liquid, wherein said threshold distance coincides with the tank having reached a desired liquid capacity.

Disclosed is a composite hydrological monitoring system, in which a counterweight component and a test component are respectively connected to both opposite ends of a strip and a plurality of sensors are disposed at different vertical positions. Accordingly, the scour depth can be measured by sensing the location of the counterweight component, whereas the water level and/or flow velocity can be determined by signals from the sensors. When the counterweight component moves downward with sinking of the riverbed, the strip would be pulled down and thus causes the test component to present a change in mechanical energy. Accordingly, the sinking depth can be measured by sensing the change of the mechanical energy. Additionally, since the water level variation would cause signal changes of the sensors arranged in a row along a vertical direction, the change of water level can be determined accordingly.

The present disclosure relates to a fill level measuring device for measuring a fill level of a liquid material in a container, including at least two flexible wire probes that extend into the container, a signal generator, and an end weight for each flexible wire probe. The end-weights are joined together such that they can rotate with respect to each other and/or can move in an axial direction with respect to each other.