New Product Release: ACVisiWater DO 120 FC10 Optical RDO Sensor

CITEK is pleased to announce the official launch of our brand-new optical dissolved oxygen sensor — ACVisiWater DO 120 FC10, expanding the ACVisiWater RDO product lineup for long-term submerged water quality monitoring.

Built on proven luminescence quenching technology, the ACVisiWater DO 120 FC10 delivers stable, low-maintenance DO measurement without polarization, a key advantage over traditional amperometric probes. It features integrated NTC temperature compensation, fast response (t90 < 30 s @ 25 °C) and low long-term drift below 1 % per week. The measuring range covers 4 ppb up to 40 ppm, supporting both low-oxygen anoxic zones and high-oxygen surface water.

To fit diverse site requirements, users may select either stainless steel 1.4435 or plastic shaft. The sensor is rated IP68 for continuous submersion, with PG13.5 process connection and wide working envelope: 0–80 °C, −1 to 12 bar g. Wetted seals use EPDM compliant with FDA 21 CFR 177.2600, EC 1935/2004, ISO 10993-5 and USP Class VI, making it suitable for environmentally sensitive and sanitary water applications.

Digital RS485 Modbus RTU interface allows up to 32 sensors on one bus, with multiple configurable baud rates. Calibration and parameter setup can be completed directly through the plant PCS / PLC system, no dedicated handheld tool required. The replaceable ACRDO sensing cap greatly cuts field service time; no electrolyte refilling or membrane trimming is needed. Measurement does not rely on sample flow and consumes zero oxygen, so it will not disturb the original dissolved oxygen level of the process liquid.

Target Applications

• Municipal wastewater & drinking water treatment
• Aquaculture, fish farms and RAS recirculating systems
• Environmental in‑situ monitoring for rivers, lakes and reservoirs
• Petrochemical, oil & gas and energy cooling water loops
• Fine chemical process rinse water and circulation water monitoring

Key Highlights

✅ Polarization-free optical design, zero oxygen consumption ✅ IP68 continuous submersion, robust shaft material options ✅ RS485 Modbus for easy integration with DCS, PLC and PCS ✅ Simple maintenance via ACRDO cap replacement ✅ Wide DO range from ppb to ppm, multiple engineering units selectable ✅ Built‑in self-diagnosis for remote status checking

The ACVisiWater DO 120 FC10 is now available for quotation and order. For datasheets, technical drawings and compatibility information with ACITEK transmitters, please contact our sales team or visit www.acitekinst.com.