The digital IQ Sensor Net multiparameter system from YSI, a Xylem brand, measures DO, pH, ORP, turbidity, conductivity, TSS, NH4+, NO3-, NO2-, K+, Cl-, PO4-, COD, BOD, TOC, SAC, sludge level, UVT-254 and temperature. Each network offers up to 20 measurements; users can extend the network at any time. Simple connectivity makes it easy to replace or add sensors and modules. Each digital sensor can store calibration data and be used along various cable lengths along the network. An optional UltraClean ultrasonic cleaning system keeps the optics free of fouling and provides data quality. 937/767-7241; www.ysi.com.