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Reliable suspended solids measurement

Measuring suspended solids and various other parameters in fluids using our proprietary innovative ultrasound measurement technology  

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Water Monitoring

Olpas has products for these fields

Olpas is best know for products in the fields of water treatment, water monitoring and sludge dewatering.  Focus is on measuring concentrations, but also viscosity and other parameters. 

Sewers, Overflows (CSOs / SSOs) and Stormwater

Sewers, Overflows (CSOs / SSOs) and Stormwater

TSS sensors deliver real‑time concentration alerts in sewers and overflows (CSOs/SSOs). The best in industry for resistance to fouling and drift.

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Hydropower

Hydropower

Olpas acoustic backscattering sensors (ABS) track sediment loads, protecting turbines with durable, low‑drift measurements. From millimeter to sub-nanometer particles.

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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.

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Drinking water & Water supply

Drinking water & Water supply

The OLPAS measurement technology allows a reliable measurement in a wide range of concentrations. For membrane protection, drinking water production or process water.

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Surface water

Surface water

SSC and TSS sensors monitor suspended solids and sediment in open waters in a wide range of particle sizes, independent of temperature changes or changes in water colour, and with season‑long accuracy.

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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.

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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.

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Most popular Olpas applications

Monitoring activated sludge (MLSS or RAS or TSS) is essential for controlling biological treatment, maintaining microbial health, and achieving stable and efficient organic and nutrient removal.

Activated Sludge

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Tracking solids (TSS) or PE (Polymers) ensures regulatory compliance, protects aquatic life, and evaluates treatment performance before water is discharged to the environment.

Effluent

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Measuring Suspended Sediment Concentration (SSC) helps evaluate transport dynamics and erosion impacts, supporting environmental monitoring and sediment management in hydrodams, rivers, lakes, coastal systems and canals.

Sediment monitoring

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Monitoring filtrate or centrate ensures dewatering efficiency, optimizes centrifuge/filter performance, and prevents downstream process issues caused by carryover of suspended solids or residual polymers.

Centrate / Filtrate monitoring

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TSS (Total Suspended Solids) is the most important water quality indicator. Olpas’ industry-leading fouling resistance makes measuring TSS economically manageable in challenging environments like sewers, overflows, CSOs, and remote open waters.

Sewers, Overflows, Stormwater and Influent

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We cover these measurements

Mixed Liquor Suspended Solids (MLSS) is the concentration of suspended solids in an aeration tank during the activated sludge process, which is a key parameter to monitor the active biomass. We measure MLSS in the range of 0-20 g/L. Measurements in the range of 0-100 g/L are available too.

MLSS - Mixed Liquor Suspended Solids

Suspended Sediment Concentration (SSC) is the amount (mass) of mineral and organic particles suspended in water. These particles include soil, silt, clay, sand, and sometimes fine debris. Olpas SSC sensors measure concentrations in the range 0-50 g/L for an exceptional wide range of particle sizes.

SSC - Suspended Sediment Concentration

Measuring Dry Solids (dry matter) in iron sludge / iron water for mining and water supply (drink water production) or industrial water treatment

Dry solids in Iron Sludge and Iron Slurry

Dry Solids measurement for Dry Cake, measuring sludge cake density in concentrations from 10 - 40 %DS. There are inline sensors available, and sensors with a sample-grabbing device.

Dry Solids (%DS) in sludge cake

RAS indicates the portion of settled activated sludge that is returned from the clarifier to the aeration tank. Maintains a high concentration of microorganisms for effective biological treatment.

RAS - Return Activated Sludge

Total Suspended Solids (TSS) is the portion of not dissolved solid particles suspended in water. It includes organic and inorganic materials, such as silt, decaying matter, industrial wastes, and sewage. Olpas TSS sensors measure in ranges from 0-1000 mg/L and 0-2000 mg/L to 0-20 g/L (and many more ranges), and in challenging environments like sewers, overflows or even in dewatering centrate.

TSS - Total Suspended Solids

Detecting polymer levels helps safeguarding membranes, control overdosing or underdosing, and minimize operational costs or environmental impact High concentrations during the activation phase, (very) low concentrations for membrane safeguarding and to limit environment risks, and residual polymer/PE-overdosing in centrate.

PCM - Polymer Concentration Measurement (PE concentration)

The Olpas Sludge Concentration sensors offers a cost-effective measurement with maintenance intervals that are four times longer compared to optical sensors.

Sludge Concentration (Solids concentration in sludge)

Available for inline measurement (with the sensor in direct contact with the fluid or paste) and as a clamp-on (for measurement through the pipe). For high solids concentrations up to 60 %DS.

High Solids Concentration Measurement

Are you active in dewatering / sewage water / industrial wastewater / watermonitoring in nature or sewers / chemical processes / ... 

Get in touch today!  

Articles and blogposts

Whitepapers

Olpas is more than technology...

Olpas is more than innovative ultrasound technology.  We develop the technology, build products using it, and are innovation partners for companies that want to incorporate OLPAS technology in their products. 

Innovative Technology 

Due to the nature of the OLPAS technology using ultrasound backscattering, an intrinsic measurement of the solids concentration is obtained. The ultrasound pulse propagates in the fluid and the resulting backscattering echo is a representative fingerprint of the suspension concentration. 

Ultrasound backscattering is independent of optical parameters, flow conditions, temperature or colour of the medium.

Easy to install

A low power, intrinsically safe, ultrasound pulse is sent into the medium. The backscattered echo is recorded by the transducer itself, allowing easy mounting of the transducers in any situation.

The transducer is no bigger than a pen.

Long maintenance window

Due to the ultrasound pulse used in Olpas measurements, fouling resistance of the Olpas sensors is far superior to competing technologies.  So no 'wipers', 'pressured air' or other automated physical cleaning instruments are needed. 

In general no re-calibration of the sensor is needed as long as the physical properties of the sensor stay intact. 

Economic solution

Olpas sensors are both CapEX and OpEx friendly.  Buying or renting a sensor is in general cheaper compared to alternatives.  Easy installation and long maintenance intervals guarantee a lower OpEx. 

We love working together with our partners to co-develop even better economic solutions for their specific needs.  

Want to know more?  Get in touch today!  

Our Partners

We are in good company: Olpas is supported by...

Logo of Flanders - State of the Art
Logo of Vlaanderen - Agentschap Innoveren en Ondernemen
Logo - SCK CEN
Logo - MYRRHY project of SCK CEN
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