A pressure transducer includes a cavity, a first dipolar molecule disposed within the cavity, and a second dipolar molecule disposed within the cavity. The first dipolar molecule exhibits a quantum rotational state transition at a fixed frequency with respect to cavity pressure. The second dipolar molecule exhibits a quantum rotation state transition at a frequency that varies with cavity pressure.

A pressure transducer includes a cavity, a first dipolar molecule disposed within the cavity, and a second dipolar molecule disposed within the cavity. The first dipolar molecule exhibits a quantum rotational state transition at a fixed frequency with respect to cavity pressure. The second dipolar molecule exhibits a quantum rotation state transition at a frequency that varies with cavity pressure.

The physical quantity measurement device includes a passage flow channel, a branch flow channel, and a physical quantity detection unit. A direction along which a pair of opposing surfaces facing each other are arranged is defined as a width direction, and a direction orthogonal both to the width direction and an inflow direction of fluid through an inflow port is defined as a height direction. An inner peripheral surface of the passage flow channel includes a height narrowing surface that narrows the passage flow channel so that a height dimension of the passage flow channel along the height direction is gradually reduced toward the outflow port while reserving a parallel region extending linearly between the inflow port and the outflow port parallel to the inflow direction. The height narrowing surface is not exposed through the inflow port in the inflow direction.

The physical quantity measurement device includes a passage flow channel, a branch flow channel, and a physical quantity detection unit. A direction along which a pair of opposing surfaces facing each other are arranged is defined as a width direction, and a direction orthogonal both to the width direction and an inflow direction of fluid through an inflow port is defined as a height direction. An inner peripheral surface of the passage flow channel includes a height narrowing surface that narrows the passage flow channel so that a height dimension of the passage flow channel along the height direction is gradually reduced toward the outflow port while reserving a parallel region extending linearly between the inflow port and the outflow port parallel to the inflow direction. The height narrowing surface is not exposed through the inflow port in the inflow direction.

A physical quantity measurement device measures a physical quantity of a fluid. The device includes a passage flow channel, a branch flow channel, a flow channel partition portion that separates the passage flow channel and the branch flow channel to have the branch flow channel branch off from the passage flow channel, and a physical quantity detector. The flow channel partition portion has a partition top portion as an upstream-side end that is not exposed through the inflow port.

A physical quantity measurement device measures a physical quantity of a fluid. The device includes a passage flow channel, a branch flow channel, a flow channel partition portion that separates the passage flow channel and the branch flow channel to have the branch flow channel branch off from the passage flow channel, and a physical quantity detector. The flow channel partition portion has a partition top portion as an upstream-side end that is not exposed through the inflow port.

The present application discloses a long-term, in-situ sampling and analysis device for sediment pore water and a method thereof. The long-term in-situ sampling and analysis device for sediment pore water includes a bracket, a probe, an elevator, a diverting device, a first water storage device, and a second water storage device, a peristaltic pump, a dissolved gas of sediment pore water analysis device and an in-situ environment measurement device. The present application can collect and store the sediment pore water in an in-situ, long-term and time-phased manner, and in low measuring error level.

A pressure detector that includes a case connectable to a flow route for liquid, and a membrane member provided in the case and with which a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas are separated from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied to the liquid-phase portion, the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion. The gas-phase portion has an opening through which the gas is allowed to be introduced or discharged in accordance with the displacement of the membrane member, and a secured portion secured for the introduction or discharge of the gas through the opening during the displacement of the membrane member toward a side of the gas-phase portion.

A pressure detector that includes a case connectable to a flow route for liquid, and a membrane member provided in the case and with which a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas are separated from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied to the liquid-phase portion, the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion. The gas-phase portion has an opening through which the gas is allowed to be introduced or discharged in accordance with the displacement of the membrane member, and a secured portion secured for the introduction or discharge of the gas through the opening during the displacement of the membrane member toward a side of the gas-phase portion.

Testing apparatus and method for testing compressed gas dispensing stations where a back pressure regulator is used to imitate filling of receiving vessels without the need for receiving vessels. A mass flow sensor measures the mass of compressed gas dispensed to the testing apparatus, and a controller calculates the pressure for the back pressure regulator to imitate filling of a receiving vessel.