News Details

Introduction

Water quality sensors are essential tools for monitoring drinking water, groundwater, surface water, wastewater, aquaculture, and industrial processes. They help users detect changes in water conditions in real time and improve safety, efficiency, and compliance.

A common question many buyers ask is:
What types of water quality sensors are there?

In this guide, we explain the main categories of water quality sensors and recommend practical models from Shenzhen Kainafo Technology Co., Ltd. based on real applications.

What Are Water Quality Sensors?

Water quality sensors are devices used to measure physical, chemical, and biological parameters in water. They provide continuous online monitoring and can be integrated into smart monitoring systems.

Typical measurable parameters include:

-pH
-ORP
-Conductivity
-TDS
-Salinity
-Dissolved Oxygen
-Turbidity
-Suspended Solids
-COD
-Ammonia Nitrogen
-Nitrate
-Residual Chlorine
-Oil in Water
-Chlorophyll
-Blue-Green Algae

Main Types of Water Quality Sensors
1. pH / ORP Sensors

Used to monitor acidity, alkalinity, and oxidation-reduction potential.

Recommended Models:
-KNF-101PRO pH/ORP Sensor
-KNF-101-2 pH/ORP Combination Sensor

Best for:

-Drinking water
-Industrial water treatment
-Wastewater systems

2. Conductivity / TDS / Salinity Sensors

Used to measure ionic concentration and water purity.

Recommended Models:
-KNF-102PRO Conductivity/TDS Sensor
-KNF-102HPRO 4-Electrode Salinity Sensor

Best for:

-RO systems
-Seawater monitoring
-Aquaculture

3. Dissolved Oxygen Sensors

Used to monitor oxygen levels in water.

Recommended Models:
-KNF-103A Optical DO Sensor
-KNF-103B Fluorescence DO Sensor

Best for:

-Fish farming
-Lakes
-Biological treatment

4. Multi-Parameter Water Quality Sensors

One device monitors multiple parameters simultaneously.

Recommended Models:
-KNF-505 Multi-Parameter Sensor
-KNF-2100Pro Multi-Parameter Water Quality Sensor
-KNF-1505 Multi-Parameter Analyzer

Best for:

-Smart monitoring stations
-Groundwater wells
-Surface water systems

How to Choose the Right Water Quality Sensor?

Consider these factors:

-What parameter do you need to measure?
-Freshwater or seawater?
-Online continuous monitoring or portable testing?
-Required communication protocol (RS485 / Modbus)?
-Installation type: submersible / pipeline / flow cell?

Conclusion

There are many types of water quality sensors, each designed for specific monitoring needs. Choosing the correct sensor improves data accuracy, reduces maintenance, and lowers operating costs.

Shenzhen Kainafo Technology Co., Ltd. offers a complete range of professional water quality sensors for industrial and environmental monitoring.

-Contact us for OEM service, technical consultation, or project solutions.