An assembly includes at least one container, an injection medium supply, at least one flow line extending from the injection medium supply to an interior portion of the at least one container; and a pressure transducer coupled to each of the at least one flow line.

A filter device including a probe where a filter element probe first end selectively engages with a sensing unit located in a filter head and a filter element probe second end is located in a contaminant portion of a filter canister. The probe fixedly engages through the filter element utilizing a sealing component. The filter element is disposed in the filter canister that engages with the filter head.

A fluid cooling/filtering assembly, having a first pump, which is designed to pump a fluid out of a first container into a circuit, and a second pump, which is designed to pump the fluid into the first container via at least one cooling and/or filtering device, where the second container is separate from the first container and collects the fluid from the circuit and from which the second pump pumps the fluid into the first container via the cooling and/or filtering device and where the second pump can be controlled at least on the basis of the fluid collected in the second container from the circuit and on the basis of the fill level of the fluid in the first and/or second container.

A separating grid includes a separating unit arranged, when in use, in a position of inclination obliquely upwards in the direction of flow of running water, fixed grid bars, movable grid bars, and a drive unit connected to the movable grid bars to actuate the movable grid bars to interact with the solid particles and to draw the solid particles out of the running water and to carry the solid particles upwards along the fixed grid bars. A position detection device detects the top position or the bottom position of the movable grid bars. A water level detection device detects the water level of the running water. A control device controls the drive unit according to information from the position detection device regarding the position of the movable grid bars and information from the water level detection device regarding the water level.

A method includes following steps. A resist liquid is flowed into a first tank and a filtration process is performed to the resist liquid. The filtration process comprises one or more repetitions of a cyclic process. The cyclic process comprises following steps. The first step of cyclic process is pumping the resist liquid from the first tank to a second tank through a first filter in a first pipeline. The second step of cyclic process is determining whether a liquid level in the first tank drops below a first predetermined threshold. The third step of cyclic process is in response to determining that the liquid level in the first tank drops below the first predetermined threshold, pumping the resist liquid from the second tank back to the first tank.