
To meet professional marine water environment monitoring demands, Y4003 sodne now offers an optional upgraded probe with blue-green algae (phycoerythrin) monitoring capability. This expanded algae detection feature greatly enriches the device’s parameter configuration options, delivering a more comprehensive and flexible monitoring solution for diverse marine scenarios.
Optimized for real-world marine monitoring conditions, the upgraded Y4003 sonde perfectly adapts to marine ranching, offshore harbors, coastal zones, and river estuaries. It supports all-in-one in-situ online monitoring with multiple water quality indicators, enabling efficient and accurate acquisition of marine ecological data. As a reliable hardware solution, it ensures stable and long-term data support for various marine environmental monitoring projects.
Core Upgrade Highlights
✅ Optional Probe Expansion: Newly added blue-green algae (phycoerythrin) monitoring parameter for targeted algae detection.
✅ Full-scenario Marine Adaptability: More complete parameter combinations to fit offshore waters, marine ranching, coastal zones and other complex marine environments.
✅ Integrated In-situ Monitoring: Streamlines real-time marine water quality and ecological observation with high efficiency and stability.

Y4003 Multi-parameter Sonde for Deep Water-Water Quality Sensor Manufacturer-Yosemitech
Yosemitech Y4003 Online Deep-Water Multi-Parameter Sonde is purpose-built for marine environmental monitoring, deep water and well deployment, featuring a robust pressure-resistant structure and self-developed titanium alloy watertight connectors.
The main unit comes with 6 sensor ports of uniform specification, supporting up to 6 probes for simultaneous measurement of 7 parameters. It continuously monitors five standard water quality metrics: water temperature, dissolved oxygen, pH, conductivity and turbidity. The sensor also supports optional measurement of ORP, chlorophyll, blue-green algae (phycocyanin), blue-green algae (phycoerythrin), oil in water and depth. All probes are constructed from titanium alloy for superior corrosion resistance.
Besides the six standard probe ports, the sonde body has a central port designed for an automatic cleaning brush. The brush effectively cleans measurement surfaces, removes air bubbles and prevents biofouling. Rated to withstand hydrostatic pressure up to 20 bar, the Y4003 delivers stable performance across diverse monitoring scenarios including marine environments, deep lakes, underground boreholes and harsh wastewater applications.
Features
✅RS485 output with standard MODBUS protocol for seamless connection to data acquisition platforms and automatic water quality monitoring stations.
✅The main unit features 6 sensor ports of uniform specification plus 1 port for the cleaning brush, compatible with all Yosemitech 22 mm deep-water probes for flexible plug-and-play installation.
✅Up to 6 probes can be connected to the main body. You may freely select probes for dissolved oxygen, conductivity (salinity), turbidity, pH, ORP, chlorophyll, blue-green algae (phycocyanin), oil in water, blue-green algae (phycoerythrin), depth and more.
✅Built-in automatic cleaning system performs scheduled cleaning. It eliminates measurement errors caused by bubbles and surface contamination, making the sensor ideal for long-term unattended online monitoring.
✅All calibration parameters are stored inside individual probes. Each probe can be replaced, calibrated and maintained on-site.
✅The multi-parameter sonde body and probes are mainly constructed from titanium alloy. Rated to withstand up to 20 bar hydrostatic pressure with stable operation, this sensor is purpose-engineered for marine environments, deep water, boreholes and other demanding working conditions.
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