Name: Multi-Parameter Water Quality Sensor for Deep-Sea Monitoring
SKU: IS844D

Marine Deep-Water Multi-Parameter Water Quality Sensor IS844D

Multi-parameter water quality sensor IS844D is specifically designed for demanding marine and deep-water conditions, providing accurate monitoring up to 200 meters deep, allows simultaneous measurement of multiple water parameters, including pH, ORP, turbidity, dissolved oxygen, etc. The multi-parameter water quality sensor IS844D features automatic probe cleaning, fast response algorithm (<30s), digital RS485 Modbus output and efficient alarm system, simplifying long-term unattended water quality monitoring. Suitable for data acquisition platforms and automatic water quality stations.

Designed for deep-sea and marine environments, supporting depths up to 200 meters (pH/ORP probes up to 100 meters).
Rugged pressure-resistant structure with custom titanium alloy watertight connectors, ensuring durability in challenging conditions.
Measures up to 7 parameters simultaneously with up to 6 interchangeable digital probes, including pH, ORP, conductivity, turbidity, dissolved oxygen, blue-green algae, chlorophyll, and oil-in-water.
Digital RS485 output and standard Modbus protocol for easy integration into data acquisition platforms and automatic monitoring stations.
Equipped with an automatic cleaning device, automatic cleaning at regular intervals to eliminate probe errors caused by pollution or air bubbles, ensuring long-term reliable monitoring.
Each single-parameter probe can be replaced, calibrated, and maintained independently in the field, providing users with great flexibility and convenience.
High-efficiency acquisition algorithm ensures fast response within 30 seconds, and alerts users to abnormal events such as downtime, communication failures, and cleaning requirements.

Parameter	Specification
Measuring Depth	0 to 200 m
Interface	Supports up to 6 freely configurable sensor, 1 removable central cleaning brush
Dimensions	Φ84 mm × 476 mm
Operating Temperature	-5 to 50 ℃
Calibration Data	Stored in the single-parameter probe; supports independable calibration in the field
Output	RS-485 output, MODBUS protocol
Brush Control	Default cleaning every 30 minutes (interval adjustable)
Power Consumption	0.8 W (non wiping), 2 W (wiping)
Power Supply Requirements	DC 12–24 V, ≥ 1 A
Protection Class	IP68
Weight	3.25 kg (main unit + 6 sensors)
Status Alarms	Internal power anomaly alarm, internal communication anomaly alarm, cleaning brush anomaly alarm
Cable Length	With waterproof connector, 50 m (default), customizable
Materials	PVC, titanium alloy, anti-fouling copper

Sensor Type	Measurement Principle	Measuring Range	Accuracy	Resolution
Dissolved Oxygen	Optical Method	0 to 20 mg/L or 0 to 200 % saturation	±1 % or ±0.3 mg/L, whichever is greater	0.01 mg/L
Turbidity	90° Scattering Light	0 to 1000 NTU (optional 0 to 4000 NTU)	±5 % or 0.3 NTU, whichever is greater	0.01 NTU
Conductivity (Salinity)	Four-electrode	Conductivity: 0 to 200 mS/cm Salinity: 0 to 175 ppt TDS: 0 to 128000 mg/L	±1 % or 0.01 mS/cm, whichever is greater ±1 ppt /	0.01 mS/cm 0.01 ppt /
Oil-in-Water	UV Fluorescence Method	0 to 50 ppm (optional 0 to 150 ppm)	Linearity: R² > 0.999	0.01 ppm
pH	Glass Electrode Method	0 to 14 pH	±0.02 pH	0.01
ORP	Platinum Electrode Method	-1999 to 1999 mV	±20 mV	1 mV
Chlorophyll	Optical Method	0 to 500 μg/L	±5 % or ±0.5 μg/L, whichever is greater	0.01 μg/L
Cyanobacteria	Optical Method	0 to 300,000 cells/mL (optional 0 to 2 million)	Linearity: R² > 0.999	1 cells/mL
Depth	Differential Pressure	0 m to 2 m…200 m H₂O	< 0.1 % F.S.	0.01 m

Specifications are subject to change without prior notice.

Marine Deep-Water Multi-Parameter Water Quality Sensor IS844D

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