1. Introduction
Water quality sensor adopts an integrated structure design. It is specially designed for water quality instruments used for long-term online monitoring. The device can monitor four key water quality parameters in real time, including temperature, conductivity (salinity) and depth, providing accurate and efficient data support for coastal ecological research.
Adheres to the design philosophy of miniaturisation, high integration, and high performance, reducing the size and weight of the sensor while ensuring performance. This not only makes installation and deployment straightforward and convenient, but also facilitates on-site cleaning, thereby saving both time and costs. The sensor can withstand pressures equivalent to depths of up to 200 metres underwater and operate reliably, making it well-suited for monitoring diverse complex aquatic environments such as coastal waters, groundwater, lakes and reservoirs.

2.Sensor Features:
Digital sensor, RS485 output, standard MODBUS protocol.
Specifically designed for long-term online water quality monitoring, integrating four key parameter monitoring functions: temperature, conductivity (salinity) and depth.
While ensuring performance, the size and weight have been reduced for easy installation and deployment.
Supports on-site cleaning, user calibration, easy to operate.

3. Technical Specifications

Water Quality Sensor
Product performance	Measure depth	0-200m(0-20bar)
	Power supply	6-36 VDC(20mA at 12VDC)
	Interface	RS-485,MODBUS protocol
	Temperature range	-5 - 50℃
	Size	Φ22mm*220.5mm
	Shell material	316L
Sensor parameter	Probe	Range	Accuracy	Resolution
	Temperature	-5-50℃	±0.05℃	0.005℃
	Electrical conductivity (salinity)	CT: 0-100mS/cm	±1% or 0.01mS/cm (take the bigger one)	0.1μS/cm
		SAL: 0-80ppt	±1ppt
	Depth	0-200m	±0.1% F.S.	0.01m

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products details

3-in-1 CTD Water Quality Sensor – Temperature Conductivity Salinity Depth Monitor with RS485 MODBUS Output, Marine Grade Corrosion Resistant, 200M Depth Rated

PH Sensor

ORP Sensor

COD Sensor

Water Turbidity Sensor

Conductivity Water Sensor

Dissolved Oxygen Sensor

Suspended Solids Sensor

Residual Chlorine Sensor

Ammonia Nitrogen Sensor

Chlorophyll A Sensor

Oil In Water Sensor

Blue Green Algae Sensor

Multi Parameter Water Quality Sensor

Water Level Gauge

Radar Water Level Sensor

Portable Water Quality Analyzer

Water Quality Monitoring Equipment

Aquaculture Monitoring System

River Monitoring System

Wastewater Monitoring System

PH Sensor

ORP Sensor

COD Sensor

Water Turbidity Sensor

Conductivity Water Sensor

Dissolved Oxygen Sensor

Suspended Solids Sensor

Residual Chlorine Sensor

Ammonia Nitrogen Sensor

Chlorophyll A Sensor

Oil In Water Sensor

Blue Green Algae Sensor

Multi Parameter Water Quality Sensor

Water Level Gauge

Radar Water Level Sensor

Portable Water Quality Analyzer

Water Quality Monitoring Equipment

Aquaculture Monitoring System