
Surface water

Olpas TSS and SSC 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.
The Olpas Watermonitoring sensor series provides a highly durable solution for water quality monitoring in challenging environments like sewers, combined sewer overflows (CSOs), and open waters.
Equipped with advanced fouling resistance and minimal sensor drift, these sensors are designed for fixed installations or mobile platforms such as boats and buoys, and can be mounted freely or within guide tubes for stability.
“Olpas watermonitoring sensors are the most economic choice when low-maintenance is required. A once-per-3-months maintenance action was enough, while our previous sensor required a once-per-week visit. The ROI of the Olpas sensor was less than 6 months!”
Maintenance Advantages & Cost Efficiency
Olpas Tentacle sensors are engineered for extended maintenance intervals, lasting up to four times longer than optical sensors. With exceptional fouling resistance and drift control the maintenance needs are minimal - even without automated cleaning mechanisms.
This resilience makes it the most cost-effective choice for sewer networks, WWTP influents, and other harsh environments.

Usage of Olpas Watermonitoring sensors
Monitoring Sewers and Sewer Overflows (sewage-side or nature-side)
Sediment runoff monitoring in canals and rivers
Monitoring TSS in influent for proactive WWTP adjustments
Ensuring compliance with discharge standards
Sensor Hardware
Olpas sensors for water monitoring are available as part of the Olpas Tentacle hardware series, consisting of a robust sensor with power&data-cable.
A communication node can be provided to collect and store the data, and to send it to a dashboard at regular intervals.
The dual-purpose Data Cable
The cable supports both power (via solar, batteries, or grid) and data transmission, ensuring reliable connectivity for continuous operation in remote or hard-to-reach locations.
Communication & Data Access
An optional communication node collects and stores data, sending updates to a dashboard at regular intervals for easy remote monitoring. The data communication uses open standards, allowing you to integrate the measurements 100% within your own systems. There is no obligation to use our software, no expensive monthly fees are required.
Applications in this field
Available Products
Number of selected Products:
5
OTE-SEDA
Water monitoring: Suspended Sediment Concentration (SSC)
Olpas SSC sensors use a novel proprietary 3-8 Mhz Accoustic Backscattering measurement technology for an exceptional wide coverage of particle sizes for its concentration measurement. The sensors are pre-calibrated, drift-resistant and require very few maintenance.