Why is graphite 4-electrode conductivity sensor more suitable for seawater measurement?

Why is graphite 4-electrode conductivity sensor more suitable for seawater measurement?

Customers often ask, I want to measure the conductivity of seawater. Do you have any good suggestions? Of course, Daxin Company has developed a conductivity sensor specifically suitable for measuring seawater - the graphite 4-electrode conductivity sensor, also called Graphite 4-pole conductivity sensor, graphite four-electrode EC sensor, graphite four-pole EC sensor .

Why is the graphite four-electrode conductivity sensor more suitable for seawater measurement?

There are 5 reasons:

First, graphite four-electrode conductivity sensors have excellent corrosion resistance.

Seawater environments are characterized by high salinity and contain a variety of chemicals. These factors pose challenges to the corrosion resistance of traditional conductivity sensors. The graphite four-electrode conductivity sensor uses graphite material with excellent chemical stability and corrosion resistance. It can work stably in seawater for a long time and reduce the performance degradation or failure of the sensor due to corrosion.

Secondly, the graphite four-electrode conductivity sensor has excellent high conductivity characteristics.

It is made of graphite, an excellent conductive material with high electrical conductivity. Sensors made of graphite electrodes can quickly and accurately measure the conductivity of seawater, ensuring the accuracy and reliability of data collection.

Third, the graphite 4-electrode conductivity sensor has 4 electrodes, which can ensure the stability and accuracy of conductivity measurement.

Sensors with a four-electrode design are capable of measuring conductivity and temperature simultaneously without the need for additional temperature compensation circuitry or sensors. This design simplifies the sensor system and improves the efficiency and reliability of data collection.

Fourth, the graphite 4-electrode conductivity sensor has a temperature compensation function to ensure temperature stability.

Water temperature varies greatly, and temperature has a significant impact on conductivity measurements. Graphite four-electrode conductivity sensors usually have a temperature compensation function, which can correct the effect of temperature on conductivity measurement in real time to ensure the accuracy and stability of the measurement results.

Fifth, the graphite four-electrode conductivity sensor has better anti-biofouling performance.

There are various microorganisms and biological pollutants in seawater, which can easily adhere to the surface of the sensor and affect the measurement accuracy. Graphite surfaces generally have good resistance to biofouling, which can reduce biological adhesion and keep the sensor surface clean, ensuring long-term stable measurements.

Some customers also asked, why not use graphite two-electrode conductivity sensors to measure seawater? Is it also a graphite conductive electrode?

Yes, both graphite two-electrode conductivity sensors and graphite four-electrode conductivity sensors are made of graphite, but for special applications in seawater, graphite four-electrode conductivity sensors are a more suitable choice.

Here’s why:

-The graphite four-electrode conductivity sensor has higher measurement accuracy than the graphite two-electrode conductivity sensor: the graphite four-electrode sensor is able to measure conductivity and temperature simultaneously without the need for additional temperature compensation circuits or sensors. The design simplifies the sensor system, improves data collection efficiency and reliability, and provides higher measurement accuracy.

-Graphite 4-electrode conductivity sensors are more resistant to polarization than graphite 2-electrode conductivity sensors.

Substances dissolved in seawater may form a polarization layer on the electrode surface, affecting the electrode's response and measurement accuracy. The graphite four-electrode conductivity sensor adopts a four-electrode design, which can reduce the impact of polarization effects and improve the stability and durability of the sensor.

- Graphite 4-electrode conductivity sensors can reduce external interference better than graphite 2-electrode conductivity sensors.

The four-electrode design makes the graphite four-electrode sensor less sensitive to external interference. In complex environments such as seawater, there may be various interference sources, such as electromagnetic interference, mechanical vibration, etc. The four-electrode design can reduce the impact of these interferences on measurement results and improve the stability and reliability of the sensor.

-The temperature compensation effect of the graphite 4-electrode conductivity sensor is better than that of the graphite 2-electrode conductivity sensor: seawater temperature changes greatly, and temperature has a significant impact on conductivity measurement.

Graphite four-electrode sensors are usually equipped with a temperature sensor to measure temperature in real time for temperature compensation, thereby more accurately correcting the effect of temperature on conduction.

So, what are the specific applications of graphite four-electrode conductivity sensors in seawater?

-Marine aquaculture water quality monitoring and pollution warning: In the mariculture industry, graphite four-electrode conductivity sensors are used to monitor the salinity and water quality of aquaculture pond water. Maintaining appropriate salinity levels is critical for the growth and survival of marine farmed species. Sensors can help farm owners monitor changes in water quality in real time and take corresponding measures to ensure breeding efficiency.

-Environmental monitoring: Graphite four-electrode conductivity sensors play an important role in the field of environmental monitoring, especially seawater quality monitoring and pollution control. By monitoring the conductivity of seawater, parameters such as seawater salinity, water quality, and salinity gradient can be evaluated to promptly detect and deal with environmental problems such as marine pollution and seawater acidification.

-Marine scientific research: Graphite four-electrode conductivity sensors are widely used in the field of marine scientific research. Scientists use these sensors to measure the conductivity of seawater and combine it with temperature data to study changes in the ocean environment, ocean current movements, hydrological properties and impacts on biological ecosystems. These data are critical to understanding the physical, chemical and biological processes of the ocean.

-Seawater desalination: During the seawater desalination process, a graphite four-electrode conductivity sensor is used to monitor changes in salinity in seawater, evaluate the operation effect of seawater desalination equipment, and ensure that the quality of desalinated water meets standards. The sensor's precise measurements help improve the efficiency and stability of the desalination process.

The graphite 4-electrode conductivity sensor developed by Daxin Company has a measuring range of up to 200mS/cm and high accuracy.

We have RS485 digital graphite 4-electrode conductivity sensors, and we also have analog digital graphite 4-electrode conductivity sensors. They can be equipped with online EC meters or handheld EC meters.

If you have more needs, you can contact us and Daxin Company will serve you wholeheartedly.

We have kinds of conductivity meter and sensor, welcome to contact us for more details.