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- The line-up of sensors we designed at Olpas, a concentration measurement instrumentation company is becoming quite something...! From left to right: - Olpas Limpet : Accurate sludge blanket level detector and sludge concentration (TSS, mg/L). Mostly used in wastewater treatment. - Olpas Inline (TUB) sensor: Available for concentration measurements from 1 mg/L up to 75 %DS for everything that moves through pipes (effluent, influent, sludge, slurry...everything!) - Olpas Tentacle: Concentration measurements with a submerged sensor.
- Vamos a la playa! At Olpas, a concentration measurement instrumentation company we've build the Olpas Nerite: a combined Total Suspended Solids (TSS/SSC) sensor with flow velocity and height (0 - 10 000mm) included. Typically, Nerite sensors are installed for long term (years) and data is recorded every 60sec of 10 minutes. To save power, we require our sensors to perform a measurement 'in a few seconds'. Measuring dynamic processes evolving faster than once per minute was not really in the scope of the sensor. However, Yves
- Yesterday we ran our new (still-secret, not on the website yet) wave and current sensor through the big wave flume at Flanders Hydraulics - Waterbouwkundig Laboratorium — h/t Yves Plancke and Tim Aertsens for the waves. Turns out 10cm waves at 3s intervals expose orbital currents faster than our current sampling rate can keep up with, so back to the lab bench for a few weeks and pushing the hardware towards 20 Hz measurement frequency. Slow, unglamorous, very real engineering, but that's how you end up with something that actually
- The current drought in Belgium and Europe results in almost no flow in most small streams. Installed sensors dry out and flowrate measurement are unusable when the level drops below 1cm of water... The dry-out of sensors is quite interesting to see. The pictures show the Olpas, a concentration measurement instrumentation company Nerite flow and sediment concentration sensor after one year of use. The fouling layer is drying and strongly attached. When the water level rises, the fouling layer will become wet and the sensor
- Three of our sensor families made an appearance at Japan's Sewage Works Exhibition 2026 - Japan's largest event dedicated to sewage water technology. Our partner AMCON INC. demonstrated . Cake Dryness sensor (OAE-SCOUT) - optimised for the dewatering screw presses of AMCON Europe (pictured left) . Olpas Tentacle sensor, a submersible sensor for an online measurement of Suspended Solids in sewage and stormwater - with minimal drift and battery powered . Olpas Inline sensor - often used to measure ingoing sludge concentrations
- Always proud to see our sensors in action. Our Olpas Tentacle SSC sensor (Suspended Sediment Concentration) is running on one of Nepal's largest hydropower plants, measuring sediment in the tough environment of Himalayan rivers where pricier, less reliable systems haven't held up before. Great work by the IES team getting it validated and live. If you need reliable SSC measurements in Nepal, reach out to Innovative Engineering Services Pvt. Ltd. - elsewhere, reach out to Jo Wouters and he'll connect you with a local partner.
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