Table of Contents Water quality parameters are indicators used to assess the condition and trends of aquatic environments. Monitoring is essential for various water
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Water Conductivity Sensor
RS-EC-*-2-*-EX water conductivity sensor is a device for measuring the conductivity of a solution. It has an automatic temperature compensation function that can compensate the conductivity of the current temperature to the specified temperature. According to the different applications, we provide two choices of stainless steel electrode and plastic electrode. There are rs485 and analog output options.
- Model: RS-EC-*-2-*-EX
- MOQ: 1 PCS
- Delivery date: within 24 hours
- Price: $53~$94.3
About - Water Conductivity Sensor
Conductivity sensors play a critical role in real time measurement of water conductivity, providing key parameters such as conductivity, salinity, and temperature. Whether you are monitoring water quality in industrial processes, environmental protection, or laboratory research, Renke conductivity sensors deliver the accuracy and performance you need to ensure reliable results. From standalone sensors to complete water quality monitoring systems, we offer a range of solutions tailored to different monitoring points, helping you achieve water quality monitoring with ease.
Stainless steel conductivity electrode
Plastic conductivity electrode
| Model | Material | Electrode constant | Measure range | Resolution |
|---|---|---|---|---|
| RS-EC-*-2-SUSP01-EX | Stainless steel electrode | K=0.01 | 0.01~20μS/cm | 0.001μS/cm |
| RS-EC-*-2-SUSP1-EX | Stainless steel electrode | K=0.1 | 0.1~200μS/cm | 0.01μS/cm |
| RS-EC-*-2-SUS01-EX | Stainless steel electrode | K=1 | 1~2000μS/cm | 0.1μS/cm |
| RS-EC-*-2-SUS10-EX | Stainless steel electrode | K=10 | 10~20000μS/cm | 1μS/cm |
| RS-EC-*-2-EP01-EX | Plastic electrode | K=1 | 1~2000μS/cm | 0.1μS/cm |
| RS-EC-*-2-EP10-EX | Plastic electrode | K=10 | 10~20000μS/cm | 1μS/cm |
Features
Our water conductivity sensor is composed of a data collector and an electrode. When using it, insert the conductivity electrode into the measuring liquid, and the data collector will send the data uploaded to our free platform or customer’s own platform through the RS485 signal or analog signal. Users can remotely view data in real time through a computer or mobile phone. To meet the needs of different users, our conductivity electrodes are available with four electrode constants. You can refer to the figure on the right and select the most suitable electrode type based on your monitoring environment.
Parameters
| Parameters | RS485 | 4-20mA/0-5V/0-10V |
|---|---|---|
| Power supply | DC 10~30V | |
| Power consumption | 0.4W | 1W |
| Measure range | K=0.01: 0.01~20μS/cm, K=0.1: 0.1~200μS/cm, K=1: 1~2000μS/cm, K=10: 10~20000μS/cm | |
| Accuracy | ±1%FS | |
| Resolution | 0.001μS/cm (0.01~20μS/cm), 0.01μS/cm (0.1~200μS/cm), 0.1μS/cm (1~2000μS/cm), 1μS/cm (10~20000μS/cm) | |
| Temperature measure range | -20℃~100℃; Resolution: 0.1℃ | — |
| Temperature measure error | ±0.5℃ | — |
| Salinity measure range | K=0.01: 0~10ppm K=0.1: 0~100ppm K=1: 0~1000ppm K=10: 0~11476ppm | — |
| TDS measure range | K=0.01: 0~10ppm K=0.1: 0~100ppm K=1: 0~1100ppm K=10: 0~13400ppm | — |
| Temperature compensation range | -20℃~100℃ (default compensation temperature 25℃) | |
| Temperature compensation coefficient | default 0.02 | |
| Component temperature resistance | -20℃~+80℃, 0%RH~95%RH (non-condensing) | |
| Electrode line length | default 5m (customizable 10m, 15m, 20m) | |
Advantages
- Conductivity measurement range: 1~20,000 μS/cm; temperature measurement range: -20~100 °C.
- Built in salinity and TDS conversion functions.
- Wide voltage power supply, supporting DC 10 to 30 V.
- The data collector enclosure features a waterproof design with protection rated up to IP65, effectively preventing damage from rain and snow during outdoor use. The conductivity electrode has an IP68 protection rating, allowing it to operate reliably even in harsh environment.
Working principle
The water conductivity sensor working principle: when the conductivity electrode is in the solution, the electrode is equivalent to resistance, and the size of the resistance is inversely related to the conductivity of the solution. When the conductivity of the solution is fixed, the resistance of the electrode is proportional to the electrode constant K. Inverse relationship. Therefore, the measured value of the conductivity of the solution is calculated based on the resistance of the electrode and the constant K of the electrode itself and is obtained through temperature compensation.
Application
EC electrodes can be used with a waterproof data processor or with a digital display controller. Widely use in:
- River/ stream water quality
- Irrigation runoff water quality
- Salinity studies/Estuary monitoring
- Wastewater quality monitoring
- Aquaculture
FAQs - Water Conductivity Sensor
What is electrical conductivity in water?
Conductivity refers to the ability to conduct current in a body of water. In water quality monitoring, conductivity is one of the important indicators reflecting the quality of water quality. When the conductivity value of the water is higher, the conductivity is better, and the TDS value in the water is larger. The TDS value represents the content of dissolved impurities in the water. The larger the TDS value, the higher the impurity content in the water. On the contrary, the smaller the impurity content, the higher the water Pure, the lower the conductivity.
How to measure conductivity of water?
The conductivity of water can be measured with a conductivity detector. Put the conductivity probe into the water. Calculate the conductivity value by measuring the change in solution resistance.
What is water conductivity sensor?
Water conductivity sensors are used in water-quality applications to measure how well a solution conducts an electrical current. This type of measurement assesses the concentration of ions in the solution. The more ions that are in the solution, the higher the conductivity.
How long is the electrode life?
In normal use, the electrode will not be scratched or corroded and can be used all the time. If the electrode is damaged, the measurement accuracy will be affected, and the electrode needs to be replaced in time.
What is temperature compensation and where does it come from?
The temperature compensation of conductivity is to compensate the conductivity value at the current temperature to the conductivity value at the specified temperature (default 25°C). The temperature coefficient is the percentage value of the change in the conductivity of the solution with the temperature, and the percentage change in the conductivity when the temperature rises by 1℃. The default 0.02 (2%) approximates the temperature coefficient of conductivity of potassium chloride solution. The user can set the temperature coefficient value by himself to make the temperature compensation more accurate. The method is to first set the temperature compensation coefficient of the device to 0, and then measure the conductance in the same solution to be tested at two different temperatures (t1, t2) Rate value (g1, g2), and then use the formula to obtain the change in conductivity per 1°C increase Δg=(g1-g2)/(t1-t2), and then measure the conductivity of the solution under test at 25°C, g0 , The temperature coefficient can be calculated as: α= Δg/g0.
How much conductivity solution is used for calibration when the user himself calibrates?
It is recommended to calibrate with a standard solution close to the conductivity value of the solution to be tested. If the conductivity value of the solution to be tested is not clear, select a standard solution close to the middle value of the range.
How to maintain a conductivity sensor?
- Under normal conditions, the sensor itself does not require routine maintenance. If a clear malfunction occurs, do not open or attempt to repair the sensor yourself. Please contact us as soon as possible.
- Before use, gently shake the conductivity electrode in the sample liquid to remove any air bubbles attached to the electrode surface. The measurement can then be performed normally.
- When the electrode is not used for a long period, it can generally be stored in a dry place. However, before reuse, it must be immersed in distilled water for several hours to activate the electrode. Electrodes that are used frequently may be stored in distilled water.
How to clean a conductivity sensor?
- Organic contamination on the electrode can be cleaned with warm water containing a mild detergent, or with alcohol. Calcium and magnesium deposits are best removed using a 10 percent citric acid solution.
- The electrode plates or pins should only be cleaned by chemical methods or by gently agitating them in water. Do not wipe the electrode plates or pins, as this may damage the platinum black coating on the electrode surface.
- The device should be calibrated before each use. For long term operation, calibration every three months is recommended. The calibration frequency should be adjusted according to application conditions, such as the level of fouling and chemical deposition.
- Do not immerse the cable connector in water before it is fully locked to the instrument connector.
How to calibrate a conductivity sensor?
For instruments with an electrode constant K = 1 and a measurement range of 1 to 10,000 μS/cm, use a 12,880 μS/cm standard solution for calibration.
For instruments with an electrode constant K = 10 and a measurement range of 1 to 100,000 μS/cm, use a 111,310 μS/cm standard solution.
During calibration, place the electrode into the standard solution after it has returned to room temperature. Gently agitate the electrode to speed up the response. Make sure the sensing section of the electrode is fully immersed in the solution and that no air bubbles are attached to the electrode surface. Then allow the system to stand still.
Once the conductivity reading has stabilized, adjust the electrode constant K according to the following formula:
Electrode constant K = (standard solution value ÷ current reading) × current electrode constant
The calibration is then complete.
How to choose stainless steel electrode or plastic electrode?
It is recommended to use plastic conductivity electrodes for non-corrosive water, such as: hydrological observation, water plant treatment, aquaculture, etc.
It is recommended to use stainless steel conductivity electrodes for corrosive water, such as environmental protection pharmaceuticals, food processing, sewage treatment, etc.
How to install the conductivity probe during use?
- Submerged installation: the lead wire of the electrode passes through the stainless steel tube, and the 3/4 thread on the top of the electrode is connected with the stainless steel 3/4 thread with raw material tape. Make sure that no water enters the top of the electrode and the electrode wire.
- Pipeline installation: connect to the pipeline through the electrode 3/4 thread.
How often should I calibrate my water conductivity sensor?
Our water conductivity sensor has been calibrated before leaving the factory. If you need to calibrate it later, you can find a solution with a known conductivity to calibrate it yourself. In the case of long-term use, it is best to calibrate once every three months.
How long is the warranty?
Under normal conditions, the electrode has a one-year warranty and the data collector has a two-year warranty.
Where can I download the water conductivity meter manual?
Please contact us for the manual.
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