A liquid leak detector for a pump is described. The liquid leak detector is mountable on a pump to detect leaked fluid coming from the pump. The leak detector includes a buffer tube positioned on the pump to collect a leaked fluid from the pump and a sensor positioned on the buffer tube to detect the level of leaked fluid in the buffer tube and to generate a signal when the leaked fluid reaches a maximum fluid level. A purge line on the buffer tube removes leaked drive fluid from the buffer tube once the leaked drive fluid reaches a maximum level. Logic connected to the sensor receives the signal from the detector and generates an alarm.

A pump monitoring system includes a pump with a pump body and a releasable head. An RFID transponder is secured to the pump head and an RFID reader in communication with a processor is provided in the pump body. The transponder receives and stores information relating to operation of the pump head. The reader reads information from the transponder and transmits further information to the transponder. The processor interprets the information from the transponder and controls operation of the pump in response.

A system for controlling a pump can include a fluid level sensor, a fuel level sensor, one or more oil pressure sensors, a pump fluid sensor, and a pump controller. The pump controller can provide speed instructions to a pump having an engine control unit, an engine, and a volute. The pump controller can include a user interface that includes a display and may also include a transceiver that is operatively engaged to a remote user device through a computer network. A method of controlling a pump can include characterizing the operation of the pump, performing a safety check of the pump, determining a level of a fluid in a tank, and providing the speed instructions to the pump.

A cooling system includes a cooling device and an electronic control device for controlling the cooling device. The cooling device has a rotating component for delivering cooling medium and a drive source for controlling the rotating component. The electronic control device stores diagnosis reference information, which indicates an actual rotation speed acceptable range when an actual rotation speed of the drive source is apart from an instructed rotation speed of the drive source. The actual rotation speed acceptable range is an acceptable range of the actual rotation speed. The acceptable range changes according to the instructed rotation speed and a voltage value applied to the drive source. The electronic control device obtains the acceptable range based on the diagnosis reference information to determine whether the cooling device is in a normal state.

An integrated, portable, battery-powered, variable-pressure electric liquid pump and power emergency station comprising a chassis; one or more wheels supporting the chassis; an electrically powered, variable-pressure liquid pump carried by the chassis; one or more rechargeable batteries powering the variable-pressure liquid pump to transfer liquid at variable pressures from a liquid source to a liquid destination; and one or more AC outlets carried by the chassis and powered by the one or more rechargeable batteries to provide emergency back-up power during power outage.

This electric compressor control device comprises: a control unit of an inverter which controls a motor that drives a compressor; a physical quantity calculation unit which calculates, on the basis of one or a plurality of predetermined detection values acquired from the inverter, a physical quantity that varies depending on a workload of the compressor; a number-of-revolutions acquisition unit which acquires the number of revolutions of the motor; a storage unit which stores information representing a first threshold that varies depending on the number of revolutions of the motor, and defines whether or not the physical quantity is a normal value; and a refrigerant abnormality determination unit which determines whether or not there is an abnormality in a refrigerant system by comparing the calculated physical quantity with the first threshold, depending on the acquired number of revolutions.

Even when abnormal heat generation occurs during operation in a state where the temperature of a compressor is not increased, abnormality cannot be detected. A fluid machine includes a fluid machine body; a motor that drives the fluid machine body; a temperature sensor that measures a temperature of the fluid machine body; and a control unit that controls the fluid machine body. The control unit changes a temperature threshold value based on at least one of a pressure of a fluid discharged by the fluid machine body and a frequency of a voltage input into the motor, and issues a notification when the temperature of the compressor body measured by the temperature sensor exceeds the temperature threshold value.

Provided is a degradation diagnostic device, which is configured to perform a diagnosis for degradation of a compressor including a compression mechanism unit to be driven along with a rotational motion of a rotary shaft, and a shell, which is configured to form an outer casing. The degradation diagnostic device includes a vibration detection device to be fixed onto an outer wall of the shell at a position at which the compression mechanism unit is located. The vibration detection device includes: a vibration sensor, which is configured to detect vibration of the compressor; a sensor holding unit including the vibration sensor; a base portion to which the sensor holding unit is connected; and a plurality of projecting portions, which are formed on a surface of the base portion on a side opposite to the sensor holding unit and to be brought into contact with the outer wall.

An exemplary apparatus includes a switch, an arm, and a rod. The switch is housed by a housing and includes an actuating tab. The arm is housed by the housing and carries an arm magnet. The arm magnet includes first and second opposed surfaces and an edge surface. The rod carries a float and a rod magnet. The rod is movable between a first rod position and a second rod position at which the rod magnet is in the housing. As the rod moves from the first position to the second position, the edge surface of the arm magnet is configured to move across a facing surface of the rod magnet, thereby moving the arm from a first arm position in which the arm does not actuate the actuating tab to a second arm position in which the arm actuates the actuating tab.

An integrated, portable, battery-powered, variable-pressure electric liquid pump and power emergency station comprising a chassis; one or more wheels supporting the chassis; an electrically powered, variable-pressure liquid pump carried by the chassis; one or more rechargeable batteries powering the variable-pressure liquid pump to transfer liquid at variable pressures from a liquid source to a liquid destination; and one or more AC outlets carried by the chassis and powered by the one or more rechargeable batteries to provide emergency back-up power during power outage.