Instrumentation & Sensors

DO probes (optical or membrane-based) provide real-time dissolved oxygen readings used to drive automatic blower and diffuser valve control.

Turbidity meters continuously monitor effluent clarity, giving an early warning of settling upsets often before lab TSS results are available.

Flow meters (magnetic or ultrasonic) track influent, effluent, and internal recycle flows, feeding both process control loops and regulatory reporting.

All process instrumentation requires a documented calibration schedule. Drifted sensors are one of the most common, and most preventable, causes of process control mistakes.

Cross-checking an online sensor reading against a manual grab-sample lab result on a regular schedule (not just during formal calibration events) catches slow drift between calibration intervals.

SCADA trend history for key instruments (DO, turbidity, flow) is one of the most valuable troubleshooting resources a plant has — a sensor problem often shows a distinctive pattern (step change, gradual drift, noisy signal) that's obvious in a trend graph but easy to miss reading instantaneous values alone.