Microwave Transmission Measurement

Microwave Transmission Measurement

Microwave transmission measurement provides a continuous inline method to determine total solids in mixtures by analyzing how microwaves propagate through the process stream. Because the response relates to bulk mixture properties rather than optical clarity, the technology is well suited for challenging media such as sludge and opaque suspensions.

The main advantage versus lab-based solids testing is timeliness. Total solids are often determined through lab sampling, which introduces delay and can miss short-duration process changes. Inline measurement provides real-time trending and faster response to variability, supporting more stable operation of solids-handling processes.

In wastewater treatment, common use cases include sludge treatment areas such as clarification, digestion, and dewatering, where solids content directly affects stability and downstream performance. A stable solids signal supports consistent loading and more predictable equipment operation, particularly when plants are trying to reduce variability across the solids train.

For project execution, pay attention to installation geometry and process conditions: ensure representative, well-mixed flow and coordinate with mechanical design to support the intended mounting approach. Commissioning typically includes correlating the inline signal to a site reference method so operating targets and alarms align with plant reporting.

When integrated into the control strategy, microwave solids measurement becomes a lever for efficiency - reducing manual sampling burden and improving responsiveness to upsets. The result is better process transparency in one of the most variable and cost-sensitive areas of water and sludge treatment.

Carotek, your trusted Endress+Hauser Representative.