The Alyza IQ PO4 is an online, cabinet-style analyzer used for continuous monitoring of orthophosphate in a municipal water resource recovery facility. This analyzer is weatherproof and can be deployed anywhere in the wastewater treatment process. Applications include monitoring bio-P removal and monitoring and controlling chemical phosphorus removal. An innovative Multivalve within the analyzer significantly reduces reagent use to 5 µL per measurement decreasing the analyzer’s regular maintenance requirements. The analyzer is available as a single-channel or two-channel instrument. The analyzer is available in one of two measuring ranges: 0.02 to 15.00 mg/L PO₄-P or 0.2 to 50.0 mg/L PO₄-P. The IQ Analyzer can be used as a stand-alone analyzer or be incorporated into an IQ SensorNet network of sensors.