top of page

Activated Sludge

Mixed Liquor Suspended Solids (MLSS) represent the concentration of suspended solids in the aeration tank during the activated sludge process. Monitoring MLSS provides valuable insight into the amount of active biomass available to break down organic pollutants in real time.

Return Activated Sludge (RAS) monitoring helps control the volume of biomass being recirculated back into the aeration tank, ensuring stable and efficient treatment performance.

Olpas sensors have an exceptional fouling resistance, resulting in low maintenance needs while resisting drift.

Activated Sludge

Olpas Sensor are available as both submersible sensors and sensors for inline mounting.


Key features


Other measurements available

Next to the MLSS-sensor and the RAS-sensor, Olpas also has sludge concentration sensors, and sensors to measure TSS.



Available Products

Filter by Fields (Filter)
Filter by Applications (Filter)
Filter by Mounting

Number of selected Products: 

2

MLSS / (activated) sludge concentration (Tentacle version, Chain mounting)
OBO-MLSA

MLSS / (activated) sludge concentration (Tentacle version, Chain mounting)

Factory callibrated sensor with modbus interface.  No screens or buttons necessary. 

MLSS / (activated) sludge concentration (Inline)
OTU-MLSA

MLSS / (activated) sludge concentration (Inline)

Factory callibrated sensor with Modbus interface. 

Extended transducer for easy installation and maintenance with Hot-Tap retractable.

Wastewater

Wastewater

Olpas sensors for water treatment are especially used for challenging measurement: high loads (ex. influent or activated sludge), with exceptional drift resistance and longer maintenance windows.

Industrial Water

Industrial Water

In industrial processes, inline ultrasound TSS measurements ensure precise control of slurry and wastewater. The unparrallled fouling resistance and the hot-tap mounting support boost efficiency.

Sludge Dewatering

Sludge Dewatering

We provide sensors for a complete insight into your sludge dewatering process by measuring sludge concentration, monitoring filtrate/centrate quality (TSS and residual polymers) and Dry Solids (%DS) in dry cake.

Related fields

We help unlock value within your field 

Articles & blogposts about Activated Sludge

bottom of page