The P700 is a cabinet-style analyzer for monitoring orthophosphate in a wide variety of wastewater applications from primary treatment through final effluent. The versatile system can process samples with solids concentrations of up to 6,000 mg/L in ambient temperatures as low as -4°F allowing measurement of orthophosphate where it is most needed for efficiently controlling phosphorus removal. The sampling system includes a lightweight 0.45 micron filter and a pump inside the analyzer cabinet. The analyzer is programmable for automatic cleaning and calibration to a standard. The P700 can be used as a stand-alone analyzer or be incorporated into a larger network with the System 2020 3G universal controller.