Water particle counter measures the size of particles in water by means of a laser light source directed through the sample and a photoelectric detector that measures the amount of transmitted light. The amount of light blockage is equated to particle size. Particle counters have a sensitivity to suspended particles in the range of 1 to 2,500 microm. The sensors are typically calibrated over a smaller measurement range, with the ranges selected to match the specific size particle of interest. It can detect particle concentrations that are not detectable with turbidimeters.
Water pipes are pipes or tubes. It is frequently made of polyvinyl chloride, ductile iron, polyethylene, or copper, that carry pressurized and treated fresh water to buildings as well as inside the building.