The present invention discloses a unit for validating an in situ decontamination effect, including a connecting end. A left end of the connecting end is in communication with any space that needs gas decontamination. A right end of the connecting end is connected to a closed isolation damper. A right end of the closed isolation damper is connected to a hollow decontamination validation chamber. A sealing cover is sleeved over an outer wall of the decontamination validation chamber. A mesh cup is placed inside the decontamination validation chamber, and the mesh cup is used for placing a bioindicator. In addition, the present invention further discloses a device for filtering biologically contaminated air, including a unit for validating an in situ decontamination effect and a hollow box installed with a high efficiency particulate air (HEPA) filter. The unit for validating an in situ decontamination effect is in communication with the hollow box. In the present invention, an actual decontamination effect of the HEPA filter after gas decontamination can be validated reliably in time, thereby effectively preventing pathogenic microorganisms that exist on the surface of the HEPA filter from spreading to the external environment, avoiding polluting the external environment, and ensuring personal safety.

Systems and methods for particle leak detection generally include a separation or collection device configured to filter particulate from a stream and a detection device downstream of the separation or collection device. The detection device can be positioned to detect particulate that passes the separation or collection device and can include a probe configured to detect the solid particles. The particle leak detection systems can be configured to be disposed on moveable systems, such as moveable systems in coke oven operations.

A control system for a variable flow filtration system that is configured for receiving an operating condition of a variable speed impeller of the variable flow filtration system; determining a threshold filter force associated with the received operating condition to determine an increased threshold filter force proportionally to increases in the received operating condition; receiving one or more real-time environmental conditions of the variable flow filtration system; modifying the determined threshold filter force based on the received one or more real-time environmental conditions; receiving a real-time filter force imparted by a filter of the variable flow filtration system on a load cell or other filtration system component, the filter force being imparted by a flow of gas or fluid driven by the variable speed impeller; comparing the received real-time filter force to the modified determined threshold filter force; and generating a filter status notification based on the comparison.

A diffusiophoretic water filter has a monitor for monitoring for leaks, blockages or efficiency. Methods are also provided.

A method for predicting the residual useful life of an air filter arrangement is described. The method includes the following steps: providing a plurality of predetermined reference degradation curves; measuring a degradation parameter of the filter arrangement; and estimating the residual useful life of the filter arrangement by comparing the predetermined reference degradation curves and an actual degradation curve defined by measured values of the degradation parameter.

An apparatus includes a motor having a first shaft extending therefrom. The motor is configured to apply energy to the first shaft. A particle cartridge mechanically is coupled to the motor via the first shaft. The particle cartridge includes a screen separating an internal volume of the particle cartridge from an environment of the apparatus, and a plurality of particles disposed within the internal volume. A particle manipulation element is mechanically coupled to the first shaft and in contact with the plurality of particles. The particle manipulation element moves in response to the energy being applied to the first shaft to force some of the particles through the screen and into the environment of the apparatus.

A system and method for accurately and efficiently testing a HEPA filter in a sterile environment, such as a clean room, by creating a closed-loop system. The system includes a multi-port interface including at least a challenge port and a verification port, each port being in communication with an area upstream from the HEPA filter. Through the challenge port, test substances are introduced to a supply air duct that is in communication with a HEPA filter. Through the verification port, a concentration of the test substances can be measured for comparison with a concentration that passed through the HEPA filter, i.e. downstream from the HEPA filter. As such, test substances can be dispersed throughout the air conditioning system before interacting with the HEPA filter, and accurately measured. The closed loop between the ports provides an accurate measurement of the concentration of test substances to test the HEPA filter.

One embodiment provides a system, including: at least two water analyzers, wherein at least one of the at least two water analyzers is positioned upstream of a purification apparatus and wherein at least another of the at least two water analyzers is positioned downstream of the purification apparatus; at least one processor; and a memory device that stores instructions executable by the processor to: receive water analysis data from the at least two water analyzers, wherein the water analysis data comprises information related to membrane integrity; identify an algorithm for calculating membrane integrity based upon received data corresponding to system attributes; and calculate, using the identified algorithm, the membrane integrity based upon the received water analysis data. Other aspects are described and claimed.

A method may include, during a filter fouling test of an air filter, determining if the air mover is operating below a first predetermined filter testing speed, in response to the air mover operating below the first predetermined filter testing speed, operating the air mover at the first predetermined filter testing speed and determining an indicator of filter degradation of the air filter responsive to the first predetermined filter testing speed, in response to the air mover operating above the first predetermined filter testing speed, operating the air mover at a second predetermined filter testing speed significantly greater than the first predetermined filter testing speed and determining the indicator of filter degradation of the air filter responsive to the second predetermined filter testing speed, and determining if the indicator of filter degradation is below a respective filter failure threshold.

An air filter includes filter media, a sensor, and circuitry coupled to the sensor, the circuitry configured to receive data from the sensor representative of the condition of the filter media and wirelessly transmit such data. The data may be received by a device with a display to use the information to present an indication of the filter media condition to a user.