An electrode cleaning and calibration system generally comprises a sensor holder assembly machined from a block of solid acrylic or similar plastic material, which can accommodate a variety of types and sizes of sensors for use in monitoring and measurement of water processing and treatment processes. Examples of sensors suitable for use in the system include pH sensors, dissolved oxygen sensors, chlorine sensors, ozone sensors, total suspended solid sensors, mixed liquor suspended solid sensors, ammonia sensors, monochloramine sensors, and ultraviolent transmittance sensors.

The invention provides a sampling apparatus for sampling fluid from a pipeline system during a pigging operation and a method of use. The sampling apparatus comprises an inlet configured to be coupled to the pipeline system, for receiving a fluid carried by a pigging operation from the pipeline system, and an outlet for discharging fluid from the sampling apparatus. A flow control valve is disposed between the inlet and the outlet. A first flow line is in communication with a sampling circuit and is disposed between the inlet and the flow control valve. A second flow line is in communication with a sampling circuit, and is disposed between the outlet and the flow control valve. The flow control valve is operable to be partially closed to create a pressure differential between the first and second flow lines, and drive a fluid passing through the sampling apparatus into the sampling circuit.

A servo-electric actuated sampler can draw samples of fuel liquid from an operating main line. The sampler can run in a fast-loop process whereby liquid is drawn into the sampling system and past an actuated sampler and then out of the system back into main. The system main run a short loop whereby the main fast-flow is restricted, and the actuator and sampler are isolated from the main line flow. When isolated, the sampler discharges liquid into sampling cans. The servo-electric actuator requires a monitored amount of power to draw and discharge fluids. Monitoring of the power requirements of the servo-electric sampler can reveal the status and reliability of the system.

A test apparatus for a waste water treatment system includes a fluid passageway having an inlet communicating with a first region of a flow path of the waste water treatment system and an outlet communicating with a second region of the flow path. At least a portion of the fluid passageway defines a test chamber within which a test may be carried out. The inlet and outlet are arranged within the flow path such that a pressure differential exists between the inlet and outlet such that waste water is caused to be diverted from the flow path through the test chamber from the inlet to the outlet of the fluid passageway. First and second valves may be provided in the fluid passageway upstream and downstream of the test chamber, the valves being operable to trap a test sample of waste water within the test chamber during a test process.

A sampling system for taking fuel samples from an external fuel tank includes a mobile platform, a sample tank carried by the mobile platform, and a supply line connected to the sample tank and configured to conduct the fuel from the external fuel tank into the sample tank. A mixing device is disposed in the sample tank and configured to mix fuel in the sample tank. A discharge line connected to the sample tank and configured to discharge the fuel from the sample tank. A sampling device is configured for removing a partial quantity of the fuel from the sample tank. A method for operating the sampling system is also described.

A sample take-off system incorporating a small volume pump with a speed loop for pressurizing excess extracted sample for return into the process stream using a single multi-channel probe for both take-off and return of the excess extracted sample is illustrated and described.

The present invention describes a tubular scoop that may be utilized with various assemblies for sampling fluid in a pipeline. The scoop includes a bend with a bend radius that is from two to four times the diameter of the scoop. The scoop defines a scoop face that is parallel to an axis of the tubular of the scoop. The scoop is mounted with a threaded connection that seals around the tubular. An additional seal comprises a compression nut that allows orientation of the scoop within the pipeline whereupon the scoop orientation is fixed by tightening the compression nut. In one embodiment, the scoop is a single outer tubular with internal bi-directional flow.

The present invention provides a method for measuring one or more parameters in a water flow in a device intended for recycling of water, said method including directing part of the water flow to a liquid-stagnant space where the measuring is performed. The present invention is also directed to a device intended for recycling of water, said device including a flow path for recycled water, a fresh water inlet, a recirculation water inlet and a recirculation water outlet, a user outlet, a heater and a filter, and wherein the device also includes an off-line bypass loop arrangement which includes a liquid-stagnant space and which off-line bypass loop arrangement also includes one or more sensors enabling measuring in the off-line bypass loop arrangement.

A wastewater sampling system including: an inlet tube; an outlet port; a high-flow circuit fluidly coupling the inlet tube to the outlet port; a first pump, along the high-flow circuit, configured to pump wastewater through the high flow circuit; a sampling circuit, fluidly coupled to the high-flow circuit via a junction, comprising a solid waste filter fluidly coupled to the junction and a solid-phase extraction cartridge fluidly coupled to an outlet of the solid waste filter; a second pump along the sampling circuit; a controller configured to, during a sampling cycle at a first time, activate the first pump; at a second time, activate the second pump; and at a third time succeeding the second time by a sampling duration, deactivate the second pump.

A filtration-free liquid sampling system may be used to extract particulate or debris-containing liquid samples that may otherwise plug a filter over its service life. For example, such a system may be used to extract liquid sample from an industrial textile washer to monitor and/or validate the quality of wash conditions within the washer. In some examples, the system includes a pump that creates a vacuum on a backstroke, drawing liquid into a sensor housing positioned between the pump and the washer. After holding the liquid in the sensor housing long enough to measure its properties, the pump can be driven in a reverse stroke to pressurize the contents in the sensor housing and force the liquid back into the washer. This vacuum fill/pressure purge can keep the sensor housing free of debris.