75results about How to "The measured value is stable" patented technology

A separation apparatus with which, in the event of diafiltration using a membrane, accurate separation of a target substance can be carried out by conducting monitoring / regulation of the tendency of permeation of the target substance with the use of analytical values and measurement values indicating the status of separation by the membrane apparatus, such as the physical values and concentrations of permeate liquid and circulating liquid / internal circulating liquid. In a diafiltration in which a washing liquid is added to a raw liquid containing multiple target substances and a target substance is drawn out into a permeate liquid obtained from the membrane separation apparatus so as to isolate the same from the other target substances remaining in the residue liquid, the tendency of target substance permeation is controlled by carrying out regulation or control within a preset region of at least one operating item selected from among permeate liquid flow rate and with respect to the membrane separation apparatus, operating pressure, operating temperature, circulating liquid concentration and circulating liquid amount with the use of the separation status index and / or progress course index for separating operation.

A temperature measuring device includes a temperature sensor, arranged within a holder, for determining the temperature of a building material located within a skip of a transport vehicle, the skip including an inner wall and an outer wall, and the holder being arranged on that side of the inner skip wall that faces the outer skip wall. The holder is arranged within a recess within the inner skip wall such that it is thermally insulated from the inner skip wall. The holder is arranged within the recess such that a region, which faces the interior of the skip, of the holder is exposed.

A method and an apparatus for measuring the thickness of a metal layer. The metal layer has a resistivity (ρ1) that differs from the resistivity (ρ2) of the metal object. The apparatus includes a first device arranged to generate a magnetic field in close vicinity of the metal layer, and to generate a variation of the magnetic field so that a current is induced in the surface of the metal layer, a second device arranged to measure the changes of the magnetic field outside the metal layer due to the induced current during a time period that is longer than the time it takes for the current to propagate through the metal layer, and a computing unit to determine the thickness of the layer based on a mathematical relation between the thickness of the layer and the measured values of the changes of the magnetic field.

The invention provides a seawater stray current in-situ monitoring device and belongs to the technical field of stray current monitoring. The monitoring device comprises a seal body, a measuring electrode system for obtaining stray current information, an upper computer system arranged above the water surface and used for displaying the stray current information of a monitoring region in real time, and a test pile. The seal body is internally provided with a single-chip microcomputer microcontroller, a storage device, a power supply module, a timing clock and a circuit conditioning module, wherein the power supply module, the timing clock and the circuit conditioning module are connected with the single-chip microcomputer microcontroller; the measuring electrode system is connected with the circuit conditioning module in the seal body through a multi-core cable; the upper computer system is internally provided with software developed based on Labview; the upper computer system is connected with the single-chip microcomputer microcontroller in the seal body through a cable; the single-chip microcomputer microcontroller realizes in-situ monitoring and recording of measurement data ofthe stray current according to a program set by the built-in software of the upper computer system; and the test pile is connected with the seal body and the measuring electrode system and is fixed to the bottom of a sea area to be monitored. The device realizes online monitoring and long-term and in-situ recording of relevant data of the stray current in the sea area.

The present invention provides a hydraulic measuring unit and a liquid level gauge using the hydraulic measuring unit, which can not only avoid the aeration of the measurement object, the prevention of the growth of the bacteria, the influence of the static region, The A pressure measuring unit includes a diaphragm (5) having a pressure receiving surface on the one surface side of the liquid to be measured, and the other side facing the air chamber (6) as a pressure receiving surface; a compressed air supply port, The air chamber (6) is provided with an opening; and an exhaust port whose open end (71) is opposed to the diaphragm (5) in the air chamber (6). The open end (71) and the diaphragm (5) of the exhaust port are lip-shaped structures which are balanced by the pressure applied to the pressure receiving surface and the pressure applied to the air chamber (6), and the open end (71).