IQ SensorNet Alyza Analyzer PO4


YSI’s new IQ SensorNet Analyzer for Orthophosphate provides accurate, reliable measurements for process control. The IQ Analyzer features a revolutionary MultiValve that dramatically reduces reagent use and maintenance requirements.

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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. The IQ Analyzer provides accurate measurements with minimal maintenance requirements.

IQ Analyzer offers:

  • Reliable, accurate measurements at low measurement concentrations
  • Extremely low reagent consumption, 5 µL per measurement
  • Automatic calibration, 1 or 2 point
  • Automatic cleaning, lowering maintenance requirements
  • Serviceable – safe and easy replacement of reagents, no need for expensive service contracts
  • One or two channel versions available
  • Reliable sample delivery pump built into the cabinet
  • Uses proven Vanadomolybdate (yellow) method of detection
  • Filtration unit allows analyzer to process samples with solids concentrations up to 6,000 mg/L

Applications include:

  • Monitoring and control of chemical phosphorus removal, reducing dosing chemicals and sludge production
  • Effluent monitoring to ensure compliance


Calibration Automatic 1- and 2-point calibrations
Cleaning Automatic cleaning with cleaning solutions
Connectivity / Communications IQ Sensor Net-components, relays, Modbus TCP, analog outputs
Dimensions 30.5 x 26.6 x 17.5 in.
Dissolved Solids Limit < 6 g/L (before filtration)
Equipment used with IQ SensorNet 2020 3G Controller, 282/284 Controller
Languages English, German
Measurement Method Vanadomolybdate (yellow) method
Operating Temperature -4 to 104 °F (-20 to +40) °C
Parameters Measured Orthophosphate
Power 120 VAC / 240 VAC, 50/60 Hz
Reagent Use 5 µL per measurement
Sample Streams/Channels 1- and 2-channel versions available
Sample Temperature 39 to 113 °F (4 to 45 °C)
Warranty 2 Years
Weight 81.6 lbs (37 kg) (without liquids)
PO4-111/112 PO4-121/122
Measuring Range

(Instrument Dependent)MR 1: 0.02 to 15.00 mg/l PO4-PMR 2: 0.2 to 50.0 mg/l PO4-PDisplayed0.00 to 15.00 mg/l PO4-P0.0 to 50.0 mg/l PO4-PResolution0.01 mg/l PO4-P0.05 mg/l PO4-PAccuracy± 2 %, ± 0.02 mg/l± 2 %, ± 0.2 mg/l

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