A system and method are directed to detecting the presence of heavy metals in a flowing fluid, such as a drinking water supply. The system includes a first chamber for receiving a filtered portion of the fluid and a second chamber for receiving an unfiltered portion of the fluid. A test device measures electrical properties of the filtered fluid in the first chamber and the unfiltered fluid in the second chamber, such as an electric potential difference, and a controller can use the measured electrical properties to detect the presence or quantity of one or more heavy metals within the fluid, such as lead, cadmium, zinc, nickel, and/or copper.

Systems and methods relate to measuring ammonium bisulfide concentration in a fluid sample. The system includes an electrolytic conductivity cell, a temperature sensor and an analyzer. Logic of the analyzer determines the ammonium bisulfide concentration based on signals received from the conductivity cell and the temperature sensor that are coupled to monitor the fluid.

To accurately measure chromaticity and turbidity while achieving downsizing and employing a turbidity measurement method based on water quality standards of each country, an optical measurement includes a cell that accommodates a liquid sample, a transmitted light measurement light source that irradiates the liquid sample in the cell with light for transmittance, a scattered light measurement light source that irradiates the liquid sample in the cell with light for scattering, a photodetector that detects light from both sources, and a reflection mirror that reflects the light for transmittance in the cell to cause the light for transmittance to be directed to the photodetector. The scattered light measurement light source emits the light for scattering toward a post-reflection optical path of the light for transmittance reflected by the reflection mirror and directed to the photodetector so that the light for scattering intersects the post-reflection optical path at a predetermined angle.

A water quality monitor system comprising a base having a first end and a second end is disclosed. A cover is removably coupled to the first end of the base such that the cover surrounds and covers the first end of the base. A flow cell jar is connected to the second end of the base. A sensor probe is connected to the second end of the base and extends downward into the flow cell jar. The sensor probe is configured to measure a plurality of water quality parameters. The base includes an inlet and an outlet connected to opposing ends of the base and connected in-line to the plumbing of a pool recirculation system. A controller is configured to provide a connection between the water quality monitor and a cloud-based storage system, using a wireless network. The measured water quality parameters are transmitted to the cloud storage system.

An inspection apparatus includes a measurement unit, a flow-in tube for flow of sample water into the measurement unit, a connection portion that connects a sample tube and the measurement unit to each other, a liquid sending portion that sends sample water to the measurement unit, a pressurization pump that increases a pressure in the inside of the sample tube, and a controller. The controller controls operations of the liquid sending portion and the pressurization pump to suppress within a prescribed range, variation in pressure applied to sample water until sample water reaches the measurement unit from the inside of the sample tube.

The present invention is a system and method for automated testing, treatment, and maintenance of fluid such as water disposed in swimming pools, spas, and other bodies of water, wherein the water testing system includes precise control over the amount of reagent used in testing, and the frequency of testing of any measurable aspect of the test water, wherein the system is optimized for minimal power consumption and reduced complexity of a system for optimized testing and flushing of test water mixed with reagents from a testing reservoir using a fluid flow path system, and the use of fewer moving parts in the fluid flow path to reduce failure and increase the usable life of the water testing system.

A system and method for the detection and elimination of microorganisms in a water flow is provided. The method includes arranging at least one light emission element at a water flow point, arranging of at least one light capture element at the water flow point, detecting the presence of the microorganism through the first light emission event and eliminating the microorganism through the realization of a second light emission event. A detection module is also provided which can be positioned at a water flow point.

An apparatus for determining total hardness in a fluid stream utilizing an ion exchange column in a monovalent cationic form having an inlet and an outlet, where one or more monovalent ion selective electrodes are positioned either at an inlet, outlet, or at both locations simultaneously. The monovalent cation selective electrodes are in electrical communication with one another, and in fluid communication with one or more valves incorporated within a fluid path in order to introduce feed water/softened water to the monovalent cation selective electrodes. Additionally, one blending valve may be incorporated in the ion exchange column to allow a fraction of the feed (hard) water to mix with a fraction of the softened water. In this manner, the blending valve may be utilized to adjust the hardness of the water at the output.

An apparatus for determining total hardness in a fluid stream utilizing an ion exchange column in a monovalent cationic form having an inlet and an outlet, where one or more monovalent ion selective electrodes are positioned either at an inlet, outlet, or at both locations simultaneously. The monovalent cation selective electrodes are in electrical communication with one another, and in fluid communication with one or more valves incorporated within a fluid path in order to introduce feed water/softened water to the monovalent cation selective electrodes. Additionally, one blending valve may be incorporated in the ion exchange column to allow a fraction of the feed (hard) water to mix with a fraction of the softened water. In this manner, the blending valve may be utilized to adjust the hardness of the water at the output.

A sensor system for swimming pools and spas is detailed herein. The sensor system can include one or more sensors positioned in a sensor housing located within a cavity of a pipe and in-line with an inlet and an outlet of the pipe. The sensor housing can divert a portion of water flowing through the cavity to an interior of the sensor housing and to an area around the sensors and maintain at least some of the diverted water in the area around the sensors even if the water is not flowing through or is drained from the pipe.