Abstract: A measuring device includes a measuring part that performs an invasive blood pressure measurement using a transducer and detects that a blood pressure measured by the invasive blood pressure measurement becomes a predetermined abnormal state during the invasive blood pressure measurement, a detecting part that detects whether or not a zero-point calibration of the transducer is being carried out, and a notification control part that controls whether or not to output an alarm based on a detection state of the detecting part when the blood pressure becomes the predetermined abnormal state.

Abstract: A device for detecting and alleviating flooding and blocked storm sewers includes a manhole cover coupled to a float body. The device also includes a canister having a drain hole and a valve. The device also includes multiple guides that can catch onto part of a sewer. The device is configured such that when water flows into the canister, the manhole cover, float body, and guides rise and the valve is opened.

Abstract: A connector to connect electric circuits inside and outside the tire includes: a tubular terminal penetrating the connector attachment hole; an outer seal member surrounding outside the tubular terminal and elastically deformed by being pressed against a tire wheel to provide a seal between the tire wheel and the tubular terminal; an inner seal member filled inside the tubular terminal; one or more rod-shaped terminals penetrating the inner seal member; a plurality of communication holes formed at a plurality of positions in a circumferential direction in an intermediate portion in an axial direction of the tubular terminal; and a plurality of seal communication portions integrally formed with one or both of the outer seal member and the inner seal member and arranged in the plurality of communication holes to transmit, to the inner seal member, elastic force toward the tubular terminal by the elastic deformation of the outer seal member.

Abstract: A communication system for underwater lifesaving and a method for locating a person immersed in water. The communication system for underwater lifesaving includes: a water immersion signal generation unit that is worn on the body of a user, detects whether the user is immersed in water, and generates a water immersion detection signal corresponding to the user when water immersion is detected; and a water immersion signal reception unit that receives a water immersion detection signal generated by the water immersion signal generation unit and analyzes the location of the user in response to a water immersion detection signal being received.

Abstract: A method for detecting a deviation in a flow meter parameter is provided. The method includes measuring a differential pressure across at least a portion of the flow meter, calculating a friction factor based on a measured flow rate and the measured differential pressure. The method also includes comparing the calculated friction factor to an expected friction factor based on the measured flow rate and detecting a deviation in the flow meter parameter if the difference between the calculated friction factor and the expected friction factor exceeds a threshold limit.

Abstract: Disclosed is a system and a method for monitoring water inrush, including: a host terminal, a field host, at least one controller and at least one electrode array. Each electrode array is placed in one borehole and to detect electric field signals of surrounding rocks around the borehole; each controller connects with one electrode array and is to control the electrode array to carry out a high-density induced polarization measurement on the surrounding rocks; the field host connects with the controller and is to send control signals to the controller, receive and process the electric field signals output by the electrode array; and the host terminal connects with the field host and is to receive the electric field signals processed by the field host, determine changes on apparent resistivity and apparent chargeability of the surrounding rocks, and determine whether there exists water inrush according to the changes.

Abstract: A method includes receiving an input indicative of at least one factor that contributes to the development of pressure ulcers; determining a risk score as a function of the input; comparing the risk score to a previous risk score; and at least one of activating a therapy configured to reduce the magnitude of the factor and notifying a caregiver if the risk score is greater than the previous risk score.

Abstract: A system and method for detecting inlet temperature distortion of an engine are described. The method comprises obtaining an outside air temperature from at least one first sensor, obtaining an inlet temperature of the engine from at least one second sensor, determining an inlet temperature distortion based on a difference between the outside air temperature and the inlet temperature, comparing the inlet temperature distortion to a threshold, and issuing an alert when the inlet temperature distortion exceeds the threshold.

Abstract: The present invention relates to a device (10) for the generation of a negative pressure for stabilizing a melt strip (200) in the area of a transport device (120) of a film machine (100) particularly with a production process of a plastic film (230) comprising: at least one main chamber (20) for generating a first negative pressure in a first influence area (310) at least one auxiliary chamber (30) for generating a second negative pressure in a second influence area (320), wherein the first influence area (310) is assignable to at least one main area (210) of the melt strip (200) and the second influence area (320) is assignable to at least one edge area (220) of the melt strip (200) adjacent to the main area (210), and wherein the first negative pressure differs from the second negative pressure in order to effect a stabilization of the melt strip (200).

Abstract: A pressure indicator is disclosed having a coupling body and an indicator member positioned within the coupling body. The coupling body has an open first end and an open second end, an inside surface and an outside surface extending from the open first end to the open second end. The inside surface surrounds a coupling body cavity. The outside surface is threaded adjacent to the second end. The coupling body is sized and dimensioned to be threaded into a bung hole of a static storage container. The indicator member is positioned within the coupling body cavity in a sealing relationship. The indicator member, biased to a first position, is movable from the first position within the coupling body cavity to a second position outside of the coupling body cavity responsive to the coupling body being exposed to a pressure within the static storage container above a predetermined pressure threshold.

Abstract: A suction cup unit for gripping workpieces comprises a suction cup member carried by a support body within which a device is arranged for autonomously generating a vacuum to be applied to the suction cup member. The vacuum generator device includes an ejector-effect device, configured to generate a vacuum by supplying a flow of pressurized air through a nozzle, a reservoir of pressurized air connected to the nozzle, at least one electrically-operated valve for controlling the connection between the pressurized air reservoir and the nozzle, and a connecting line between the nozzle and the suction cup member, for transmitting a vacuum to the suction cup member when pressurized air is made to flow through the nozzle.

Abstract: A testing device for a backflow preventer assembly has a plurality of automated valves. Each automated valve is coupled to a corresponding test valve of the backflow preventer assembly. A high side diverter array is coupled to at least one of the plurality of automated valves. A low side diverter array is coupled to at least one of the plurality of automated valves. A vent side diverter array is coupled to at least one of the plurality of automated valves. A pressure differential transmitter is coupled to the high side diverter array and the low side diverter array. A high side bleed solenoid is coupled to a high side of the pressure differential transmitter. A low side bleed solenoid is coupled to a low side of the pressure differential transmitter. A vent side bleed solenoid coupled to a vent side diverter array. A plurality of bypass solenoids is coupled to the high side bleed solenoid, the low side bleed solenoid and the vent side bleed solenoid.

Abstract: A method of controlling hydraulic fluid flow to a material handling vehicle implement includes coupling a boom arm to a vehicle frame for rotation about the vehicle frame, rotating a boom arm with respect to the vehicle frame with a first actuator, coupling an attachment to the boom arm for rotation with respect to the boom arm, rotating the attachment with respect to the boom arm with a second actuator, sensing a velocity of the attachment, communicating the sensed velocity to a control system, sensing a weight of the attachment, communicating the sensed weight to the control system, calculating a kinetic energy of the attachment based upon the sensed velocity and the sensed weight of the attachment, and adjusting fluid flow through the control valve to limit a range of movement of the attachment in response to the calculated kinetic energy of the attachment exceeding a pre-determined kinetic energy.

Abstract: The invention relates to a device for measuring temperature in a high-voltage portion of a switchgear station, characterised in that it comprises: at least one temperature sensor (21, 22, 23, 24) located at a point on the high-voltage portion of which the temperature is to be monitored, at least one antenna (25) connected to the at least one temperature sensor, a control module (26) located in a low-voltage portion of the switchgear station, and at least one antenna (27) connected to the control module. The at least one temperature sensor (21, 22, 23, 24) is suitable for transmitting a signal representative of a temperature measurement and the control module (26) is suitable for receiving the representative signal, via the antennas, and for processing said signal in order to produce a message.

Abstract: The invention relates to a oxygen reduction system as well as a method for operating an oxygen reduction system. The oxygen reduction system comprises an inert gas source and a line system which is fluidly connected or connectable to the inert gas source and to the at least one enclosed area in order to supply the gas provided by the inert gas source to the at least one enclosed area as needed. The invention provides for conducting a leak test on at least one section of the line system by pressure-testing the line section to be checked for tightness using at least a portion of the gas mixture or gas provided by the inert gas source.

Abstract: A scuba tank pressure monitor system comprises a scuba tank pod and a wearable electronic device. The scuba tank pod includes an air pressure detector, a first transducer element, and a first processing element. The air pressure detector detects an internal air pressure of the scuba tank. The first transducer element transmits sonar waves including scuba tank related status data having a first frequency range. The first processing element controls the first transducer element to transmit sonar waves including the scuba tank related status data. The wearable electronic device includes a second transducer element, and a second processing element. The second transducer element receive sonar waves including the scuba tank related status data from the scuba tank pod and transmits sonar waves including alert tones having a second frequency range. The second processing element controls the second transducer element to transmit sonar waves including the alert tones.

Abstract: Methods and apparatus to control thrust ramping of an aircraft engine are disclosed. An example thrust control system includes a sensor to measure a crosswind speed and a thrust manager to compare the measured crosswind speed to a crosswind threshold range. The thrust manager activates a partial thrust ramping schedule during takeoff when the measured crosswind speed is within the crosswind threshold range. The partial thrust ramping schedule is selected from a plurality of thrust ramping schedules.

Abstract: A medium- or high-voltage switch (10), comprising a high-vacuum enclosure (111); first and second contacts (121, 122) that are mounted to be movable in translation relative to each other inside the enclosure (111) between an open position in which the first and second contacts (121, 122) are spaced apart; and a closed position in which the first and second contacts (121, 122) are in electrical contact. The switch (10) further comprises a conductor (210, 220, 230) arranged inside the enclosure (111) in such a manner that there exists a pressure threshold inside the enclosure (111) from which partial discharges are generated by said conductor, at least when the first and second contacts (121, 122) are in the closed position and the medium or high voltage is applied to the switch (10). The invention further relates to a switch assembly and to a method of testing such a switch.

Abstract: An indicator assembly for determining a liquid level condition within a tank includes a dial assembly with a base and a lens or cover connected to the base. A channel is formed in the lens and a go-no-go protrusion projects into the channel. An actuator is located between the base and the cover and is movable in response to a change in liquid level in the tank. The indicator assembly also includes a sensor module for insertion into the channel. The sensor module has a housing with a sensor for determining movement of the actuator in response to a change in liquid level. A go-no-go cavity complementary in shape with the go-no-go protrusion is formed in the housing so that the sensor module can be fully inserted into the housing with the sensor aligned with the actuator for generating signals related to the liquid level condition.

Abstract: A rubber patch, which is useable for mounting an active electronic component to a tire, is described. The rubber patch includes a base having a connecting face and support face. The connecting face is substantially planar and is intended to be fixed to an internal surface of the tire. The support face is opposite the connecting face and is arranged to support the active electronic component. The rubber patch further includes a passive label arranged between the connecting face and the support face. The passive label is for identifying the tire and is provided with a memory for storing a unique identification data item pertaining to the tire. A corresponding tire monitoring system, which is configured to read at least the identification data item pertaining to the tire, also is described.

Abstract: A ram air fan (RAF) assembly is provided and includes a ram air inlet, a heat exchanger disposed in the ram air inlet, an RAF disposed in the ram air inlet to drive airflow through the heat exchanger, a sensor disposed in the ram air inlet proximate to the RAF and a controller. The controller is operably coupled to the RAF and the sensor and is configured to drive rotations of the RAF to achieve a target RAF rotational speed in accordance with a determination that a reading generated by the sensor is indicative of a surge event.

Abstract: A tester that measures pressure includes at least one pressure input port, at least one transducer, GPS communications, and a controller. The transducer measures pressure of the pressure input port. The controller is coupled with the transducer and the GPS communications such that the controller associates location data provided by the GPS communications with the pressure measured by the transducer to create a test result.

Abstract: A rubber patch, which is useable for mounting an active electronic component to a tire, is described. The rubber patch includes a base having a connecting face and support face. The connecting face is substantially planar and is intended to be fixed to an internal surface of the tire. The support face is opposite the connecting face and is arranged to support the active electronic component. The rubber patch further includes a passive label arranged between the connecting face and the support face. The passive label is for identifying the tire and is provided with a memory for storing a unique identification data item pertaining to the tire. A corresponding tire monitoring system, which is configured to read at least the identification data item pertaining to the tire, also is described.

Abstract: A plunger is moved downwardly in predetermined distance while the tip of the sample probe is immersed in a sample to suck the sample into the probe. A pressure sensor detects the pressure fluctuation during the suction operation, an AD converter converting the signals into digital signals to send the signals for a signal processing unit. The signal processing unit extracts feature variables data of a suction waveform to calculate the Statistical distance from normal group data. The Statistical distance an a threshold value are compared with each other, it is judged that there is an abnormality in the suction operation when the Statistical distance is more than or equal to the threshold value. When the Statistical distance is smaller than the threshold value, an operation is proceeded to a discharge operation.

Abstract: In an embodiment, a system for processing runner data includes a pressure sensor set having a first pressure sensor disposed in a footbed, the first pressure sensor including a first polyolefin sheet and a first gas chamber formed at least in part by the first polyolefin sheet, an electronics module coupled to the pressure sensor set, the electronics module including a first accelerometer, and a second accelerometer.

Abstract: A gas delivery system including a gas delivery device, a control module and a gas delivery mechanism is described. An exemplary gas delivery device includes a valve assembly with a valve and circuit including a memory, a processor and a transceiver in communication with the memory. The memory may include gas data such as gas identification, gas expiration and gas concentration. The transceiver on the circuit of the valve assembly may send wireless optical line-of-sight signals to communicate the gas data to a control module. Exemplary gas delivery mechanisms include a ventilator and a breathing circuit. Methods of administering gas are also described.

Abstract: A gas delivery system including a gas delivery device, a control module and a gas delivery mechanism is described. An exemplary gas delivery device includes a valve assembly with a valve and circuit including a memory, a processor and a transceiver in communication with the memory. The memory may include gas data such as gas identification, gas expiration and gas concentration. The transceiver on the circuit of the valve assembly may send wireless optical line-of-sight signals to communicate the gas data to a control module. Exemplary gas delivery mechanisms include a ventilator and a breathing circuit. Methods of administering gas are also described.

Abstract: Layers of padding materials or cushions formed from an elastic foam matrix structurally supporting and encapsulated gel elements are disclosed. Methods of manufacturing such composite and laminated composite padding materials, layers of padding, or cushions are also disclosed.

Abstract: The present invention relates to a coverslipping machine (1) including: a hollow needle (2) for applying mounting medium onto a specimen slide (5); a transparent container (103) to be filled with a liquid; a light source (101) for radiating measurement light in a principal radiating direction (A) into the container (103); and a light sensor (102, 102?) for detecting the measurement light, the light source (101) being arranged with respect to the container (103) in such a way that the radiated measurement light is refracted by a liquid in the container whose fill level exceeds a fill level limit, the light sensor (102, 102?) being arranged with respect to the container (103) in such a way that only measurement light refracted by the liquid or only measurement light not refracted by the liquid is detected.

Abstract: Methods, systems and controllers for detecting a surge event based on pattern of evolution of a discharge pressure of a compressor, and for relocating a surge margin relative to a surge parameter value recorded at the beginning of the surge event are provided. A controller has an interface configured to receive values of the discharge pressure from a compressor, and to output signals and alarms, a surge event detection unit connected to the interface and configured to detect a surge event in the compressor based on evolutions of the discharge pressure, a rate of the discharge pressure and a rate change of the rate, and a surge margin relocation unit connected to the surge event detection unit and the interface, and configured to relocate a surge margin relative to a surge parameter value recorded at a beginning of the surge event.

Abstract: A monitoring system for use with a turbine engine is described herein. The turbine engine includes a compressor and at least one compressor bleed valve coupled to the compressor. The monitoring system includes at least one sensor that is for sensing an operational parameter of the compressor bleed valve, and a controller that is coupled to the sensor and the compressor bleed valve. The controller is configured to determine an operating mode of the turbine engine and receive a monitoring signal indicative of the sensed operational parameter. The controller is also configured to calculate at least one operational value of the compressor bleed valve based at least in part on the sensed operational parameter. The controller is further configured to determine a condition of the turbine engine based at least in part on the calculated compressor bleed valve operational value.

Abstract: A method, computer program product, and infusion pump assembly for determining a first rate-of-change force reading that corresponds to the delivery of a first dose of an infusible fluid via an infusion pump assembly. At least a second rate-of-change force reading is determined that corresponds to the delivery of at least a second dose of the infusible fluid via the infusion pump assembly. An average rate-of-change force reading is determined based, at least in part upon the first rate-of-change force reading and the at least a second rate-of-change force reading.

Abstract: A storage system for material containers provides a readable ID distinguishing each container, and includes a scale that weighs containers, so that the system can distinguish between containers that are sufficiently loaded to be effective and containers that are insufficiently loaded. The system preferably includes storage for containers held in contact with readers of the container IDs. This allows a controller to keep track of containers checked out for use and returned for storage, and to identify containers that have been discharged.

Abstract: A mobile terminal device includes: a housing; a measuring unit configured to measure an air pressure inside the housing; a detecting unit configured to detect whether the housing is sealed based on a change in the air pressure measured by the measuring unit while an operation is being conducted by a user; and a notifying unit configured to notify the user of a detection result of the detecting unit.

Abstract: An enhanced dive computer functionality providing a diver positioning system integrated into a dive computer and a modified Display Integrated Vibrating Alarm device controlled by the dive computer to allow for decompression integrated guidance and a buddy signalling device. The diver positioning system allows for automatically determining the diver's position by tracking the diver's location in three dimensions within a water column, or portion of the body of water in which the diver operates bounded by the surface and the maximum dive depth, during a dive. A modified Display Integrated Vibrating Alarm allows for guiding a diver through a controlled decompression ascent and a method for automatically warning companion or nearby divers of imminent danger of injury or death to a subject diver.

Abstract: In the specification and drawings, an apparatus for conducting hot work is described and shown with an enclosure; a hot work apparatus operable within the enclosure; and a detector located exterior of the enclosure, the detector being in detecting communication with the interior of the enclosure, such that the detector detects the presence of a condition within the enclosure. A method of conducting hot work is also described and shown.

Abstract: A syringe drive device 11 includes a fixing section 15 fixing an outer tube 14, a movable holder 16 holding a plunger 13, and a drive section 42 driving the holder 16 along an axis of the plunger to push and pull the plunger with respect to the outer tube 14. An internal pressure detector 18 has a positive pressure detection switch 63 detecting an internal pressure of a syringe 12. A determination section 41 determines the issuance of an alert when the holder 16 is stopped and the positive pressure detection switch 63 is ON. A display section 19 is lit to indicate the alert when the determination section 41 determines to issue the alert.

Abstract: A mattress includes a generally rectangular prismatic foam body, having a length, a width, and a thickness, having a top surface, a plurality of slits in the top surface of the foam body extending across the width of the body to divide the top surface into a plurality of adjacent slats. An elongate chamber extends through the body, parallel to and aligned with each slit. At least one fluid filled cell disposed in each of the elongate chambers to support the edges of adjacent slats.

Abstract: Described is drug infusion device with one or more vents that permit the passage of gas between the exterior and interior of the device's housing. In one embodiment the device may include multiple interior chambers of differing volume and pressure sensors placed between them, while vents to ambient pressure are included in each chamber. According to this exemplary structure, the readings from the pressure sensor may be used to determine malfunctions in the venting of the device and/or changes in pressure that could cause the unintended delivery of medication.

Abstract: A cost effective manometer is realized for accurately measuring back pressure in all types of vents and ducts. Common back pressure can be caused by restrictions, such as lint or soot buildup. The manometer consists of a main body having two reservoirs for storage of measuring fluid. The first reservoir contains measuring fluid during transit eliminating the need for end user to manually fill manometer prior to first use. Measuring fluid is transferred to second main reservoir prior to initial use. The second reservoir contains an adjustable bladder or plunger for obtaining a zero reading prior to measurement. The manometer can be used on all types of vents and ducts where positive or negative pressure exists. The manometer can be used for measuring positive or negative pressures as well as differential pressures.

Abstract: To provide reliable notification of a fault state when a power supply to a calculation processing portion is in the OFF state when a power supply to a communication processing portion is in the ON state. An isolating circuit, an inverting circuit inverting a signal branch-outputted through an output line of the isolating circuit, and a selecting circuit that uses the signal outputted from the output line of the isolating circuit as a first input and the inverted signal from the inverting circuit as a second input, to select either the first input or the second input, depending on a selection setting status thereof, to output the selected signal to the communication processing portion are provided. A +5 V voltage is applied through a resistor to the output line of the isolating circuit. This +5 V voltage is produced through the power supply supplied from the second double-wire transmission path.

Abstract: A method for alerting an operator during linkage overload in a machine is disclosed. The method includes calculation of operational height of a payload carrier. Fluid pressure in one of a lift cylinder assembly and a tilt cylinder assembly is sensed and weight of a payload based on the fluid pressure is calculated. Maximum payload height based on the pressure of at least one of the lift cylinder assembly and the tilt cylinder assembly, is determined Based on the maximum payload height, a threshold payload height is determined and compared with an operational height of the payload carrier. When the operational height of the payload carrier is equal to or greater than the threshold payload height, at least one of a warning generation event and limiting raising of the lift cylinder assembly occurs.

Abstract: A pneumatic pressure detector comprises a first electrical terminal, a second electrical terminal and a deformable diaphragm configured to deform between first, second and third positions. When the diaphragm is in its first position, the first and second terminals are open. When the diaphragm is in its second position, the first terminal is open and the second terminal is closed. When the diaphragm is in its third position, the first and second terminals are both closed. The pneumatic pressure detector may be connected to a sensor tube.

Abstract: A tamper detector is provided for safeguarding a radiological source that is moved into and out of a storage location through an access porthole for storage and use. The radiological source is presumed to have an associated shipping container approved by the U.S. Nuclear Regulatory Commission for transporting the radiological source. The tamper detector typically includes a network of sealed tubing that spans at least a portion of the access porthole. There is an opening in the network of sealed tubing that is large enough for passage therethrough of the radiological source and small enough to prevent passage therethrough of the associated shipping cask. Generally a gas source connector is provided for establishing a gas pressure in the network of sealed tubing, and a pressure drop sensor is provided for detecting a drop in the gas pressure below a preset value.

Abstract: A pneumatic sensing apparatus for use in an overheat or fire alarm system comprising a sensing assembly that comprises a sensing means 51, 61, 71, containing a pressurized gas, coupled to a pressure sensor 52, 62, 72. The pressure sensor 52, 62, 72, is configured to produce a signal that is indicative of the gas pressure. The pressure sensor 52, 62, 72, comprises an optical pressure sensor and the signal comprises an optical signal.

Abstract: A system used to determine the near presence of a tornado and to alert those in the immediate area.

Abstract: An alarm system for a smoke or fire barrier, including alarm circuits have a normally closed switch position. A control circuit connected to the alarm circuits applies a voltage to create a non-activation situation or remove a voltage to create an activation situation when the switch is open. The alarm circuit further including either a series connected resistance or a normally open switch position in parallel to the normally closed switch position, to create a “fault” condition in the absence of detection of the resistance, or an open switch position and a closed switch position.

Abstract: A method for fire detection in enclosed environments (1) subject to explosion protection regulations out of which an air-dust mixture is filtered while the concentration of dust of the air-dust mixture is lowered to under the explosion limit by a filter (2) and the aspirated air-dust mixture is checked for burning characteristics and if appropriate a fire alarm is triggered, in which the function of the filter (2) is monitored, the fire detection is carried out by use of an aspirating smoke detector system (7) not approved for use in potentially explosive areas but instead is deployed outside the ex-zone and if the filter (2) is destroyed a signal processing unit (15, 15.1) of a malfunction monitoring sensor (14) generates a signal which initiates a subsequent action preventing aspirated air-dust mixture with an elevated concentration of dust from entering the aspirating smoke detector system (7).

Abstract: A device for identifying the air flow condition within a clothes dryer having a lint filter, an exhaust passage, and a blower is disclosed. The device includes a sensor, an input having a first end connected to the sensor and a free second end, wherein the free second end is adapted to be disposed within the clothes dryer, upstream from a filter, and wherein the sensor detects a differential between an operating pressure at the free second end of input versus a reference pressure to thereby determine whether a sufficient vacuum is present within the clothes dryer, and an output that provides an output characteristic based on the differential, wherein the output characteristic changes from a first characteristic to a second characteristic when the differential surpasses a differential threshold.

Abstract: A method and apparatus for detecting leakage of flowing liquids from pipes includes an upstream flow-rate sensor positioned between a source of a flowing liquid which is conducted from a source to a destination terminal such as a VAV heat exchanger, and a downstream flow-rate sensor positioned between an outlet port of the destination terminal and a return line for the flowing liquid. The apparatus includes electronic control circuitry which is responsive to a differential flow-rate between upstream and downstream measured flow rates which exceeds a predetermined limit value in removing a valve-opening signal to the upstream shut-off valve, thus closing the valve to interrupt flow of liquid through the valve if the differential flow-rate signifies a leak. Optionally, the apparatus also includes a downstream shut-off valve positioned between the destination terminal and a return line, which is also closed in response to a differential flow-rate exceeding the limit value.