Systems, methods, and software program products for dispensing chemical solutions. A controller receives a signal from a pressure sensor indicative of a pressure of a diluent. The controller determines an expected flow rate of the diluent through an eductor based at least in part on the pressure of the diluent. The controller may further determine an expected concentration of a chemical product in the solution dispensed from a discharge port of the eductor. Based on the expected flow rated and concentration of the chemical product, the controller determines a duration of a dispense stage of a dispensing operation required to dispense a predetermined dose of the chemical product. The controller then causes the diluent to flow through the eductor for the determined duration of the dispense stage. A check valve on the output of the eductor prevents dissimilar chemicals from mixing and reduces a response time of the eductor.

The present disclosure provides improved particle processing (e.g., cytometry and/or cell purification) systems and methods that can operate in an autonomous fashion. More particularly, the present disclosure provides for assemblies, systems and methods for analyzing, sorting, and/or processing (e.g., purifying, measuring, isolating, detecting and/or enriching) particles (e.g., cells, microscopic particles, etc.) where human intervention is not required and/or is minimized. The systems, assemblies and methods of the present disclosure advantageously improve run performance of particle processing systems (e.g., cell purification systems, cytometers) by significantly reducing and/or substantially eliminating the burden of operation for human intervention by automating numerous functions, features and/or steps of the disclosed systems and methods.

The present disclosure provides improved particle processing (e.g., cytometry and/or cell purification) systems and methods that can operate in an autonomous fashion. More particularly, the present disclosure provides for assemblies, systems and methods for analyzing, sorting, and/or processing (e.g., purifying, measuring, isolating, detecting and/or enriching) particles (e.g., cells, microscopic particles, etc.) where human intervention is not required and/or is minimized. The systems, assemblies and methods of the present disclosure advantageously improve run performance of particle processing systems (e.g., cell purification systems, cytometers) by significantly reducing and/or substantially eliminating the burden of operation for human intervention by automating numerous functions, features and/or steps of the disclosed systems and methods.

Expert system and method for computing an adjustment procedure for obtaining an adjusted exterior waterborne paint composition for an exterior surface to be painted at a paint application site on a specific date. A starting exterior waterborne paint composition comprises base chemical compounds. When one or more computed target values of target chemical compounds for the adjusted exterior waterborne paint composition are determined different from the plurality of base values, the adjustment procedure is computed for transforming the starting exterior waterborne paint composition into the adjusted exterior paint composition and instructions comprising the adjustment procedure are sent to a remote device.

Expert system and method for computing an adjustment procedure for obtaining an adjusted exterior waterborne paint composition for an exterior surface to be painted at a paint application site on a specific date. A starting exterior waterborne paint composition comprises base chemical compounds. When one or more computed target values of target chemical compounds for the adjusted exterior waterborne paint composition are determined different from the plurality of base values, the adjustment procedure is computed for transforming the starting exterior waterborne paint composition into the adjusted exterior paint composition and instructions comprising the adjustment procedure are sent to a remote device.

A method for estimating the prevalence of a biochemical condition in a population includes accessing, based on a wastewater sample collected by a wastewater sampling system that samples from a wastewater flow serving the population: a biochemical indicator concentration of a biochemical indicator characterized by a correlation of the biochemical indicator with the biochemical condition; and a biomarker concentration of a biomarker correlated with presence of human excreta. The method also includes: normalizing the biochemical indicator concentration based on the biomarker concentration; adjusting the biochemical indicator concentration based on decay characteristics of the biochemical indicator in wastewater; calculating a biochemical indicator mass estimate for the population based on the biochemical indicator concentration and an effective flow volume of the wastewater flow; and estimating a prevalence of the biochemical condition in the population based on the correlation of the biochemical indicator to the biochemical condition and the biochemical indicator mass estimate.

A method for estimating the prevalence of a biochemical condition in a population includes accessing, based on a wastewater sample collected by a wastewater sampling system that samples from a wastewater flow serving the population: a biochemical indicator concentration of a biochemical indicator characterized by a correlation of the biochemical indicator with the biochemical condition; and a biomarker concentration of a biomarker correlated with presence of human excreta. The method also includes: normalizing the biochemical indicator concentration based on the biomarker concentration; adjusting the biochemical indicator concentration based on decay characteristics of the biochemical indicator in wastewater; calculating a biochemical indicator mass estimate for the population based on the biochemical indicator concentration and an effective flow volume of the wastewater flow; and estimating a prevalence of the biochemical condition in the population based on the correlation of the biochemical indicator to the biochemical condition and the biochemical indicator mass estimate.

A system, method and apparatus for determining and controlling water clarity or water opacity especially useful in pools, spas, and contained bodies of water.

A system, method and apparatus for determining and controlling water clarity or water opacity especially useful in pools, spas, and contained bodies of water.

Device and methods for controlling pH or ionic gradient comprising a multisite array of feedback electrode sets comprising electrodes and pH sensing elements. The electrodes can include a reference electrode, counter electrode, and a working electrode. The device and methods iteratively select an amount of current and/or voltage to be applied to each working electrode, apply the selected amount of current and/or voltage to each working electrode to change pH of a solution close to the working electrode, and measure the signal output of the sensing element. The multisite array can include feedback and non-feedback electrode sets.