Water EC sensor TDS conductivity sensor module

♦A key to on-line calibration, automatic temperature compensation.

♦Calibration electrode quality alarm, drop the electricity protection (can make the calibration results and preset data is not lost due to power off or power failure), over-current protection, overvoltage protection.

♦High measuring accuracy, fast response, long life and other characteristics.

♦Small size, light weight, easy to install and maintain.

♦Standard industrial signal output (0, 0 to 10 v to 5 v, 4-20 ma, ModbusRTU485) can satisfy the connection of real-time monitoring equipment.


  • Item No :

  • Order(MOQ) :

  • Payment :

  • Product Origin :


Water  EC sensor TDS conductivity sensor module

TDS transmitter has the characteristics of on-line one-button calibration, automatic temperature compensation, alarm of electrode quality when calibration, power-off protection (s The calibration result and preset data can't be lost due to power off or power failure), over-current protection, over-voltage protection, high measurement accuracy, fast response, long service life and so on. The product is small in size, light in weight, easy to install and maintain, standard industrial signal output (4-20mA, Modbus RTU-RS485) can maximize the connection of various on-site real-time monitoring equipment. The product is conveniently connected with all kinds of control equipment and display instruments to realize TDS on-line monitoring.

It is suitable for plant culture, water-saving irrigation, scientific experiment, Greenhouse, flowers and vegetables, fine agriculture, sewage treatment, environmental protection and other occasions.

ltems Parameters
EC range Options:0-440 us/cm、0-4400 us/cm、0-44000 us/cm
EC precision ≤±2%F.S
TDS range Options:0-200PPM、0-2000PPM、0-20000PPM
TDS precision ≤±2%F.S
Power supply DC 12V-24V
Output 0-5V/0-10V/4-20mA/RS485
load resistance Voltage output:R load ≥5K Ω
Current output:R loads(Uvcc-3)/0.02Q
Consumption <1W
Storage condition 10-50℃(-20-+80C peak)20-60%RH
Working environment 0~100℃
dimension 65X46X28.5mm³

Technical Specification

Product Name Water TDS Sensor
Working Voltage 12-24V DC
Power consumption <1W
Working Temperature 0-100℃
Working Humidity 0-100%RH
Storage Temperature 10-50℃
Storage Humidity 20-60%RH
Detection Substance TDS
Detection Range 0-2000ppm
Output Signal Default 4-20mA (optional RS485)
Response Time <2S
Load resistance Current output: Rload≤(Uvcc(supplyvoltage)-3)/0.02Ω
Accuracy ≤±2%F*S (full scale)
Product Material ABS 5m platinum black electrode
Product Size 65mm*46mm*28.5mm

The linear relation between analog signals and the corresponding physical quantities:

0 to 5 v output: quantity = corresponding range sensor output voltage / 5.0 x;
0 to 10 v output: quantity = corresponding range sensor output voltage / 10.0 x;
4-20 ma output: physical quantities corresponding range = x (sensor output current 4.0) / 16.0;

For example: 0 to 5 v output, a range of 4400 us/cm, if the sensor output voltage is 3 v, the corresponding EC value at this time
To: EC = 4400/5.0 us/cm x sensor output voltage
= 4400 us/cm x 3.0/5.0 = 2640 us/cm

For example: 4-20 ma output, range is 2000 PPM, if the sensor output current of 12 ma, the corresponding TDS value at this time
To: TDS = 2000 PPM x (sensor output current 4.0) / 16.0
= 2000 PPM x (12.0 4.0) / 16.0 = 1000 PPM

Water EC sensor TDS conductivity sensor analog signal

Water TDS (Total Dissolved Solids) Sensor analog signal

Transducer calibration and electrode quality detection

1, the electrode with distilled water without CO2 dry clean and soft tissues.
2, correctly connected transmitter power and electrode.
3, long press calibration button until the indicator light yellow, then loosen the button.
4, fast calibration button twice calibration until the red light flashing, the transmitter into the zero calibration process
(this process is 30 seconds long), after the calibration light is normally on red.
5, calibration indicator light red into the prepared standard liquid after normally on electrodes, different range and the corresponding standard fluid is as follows:
0-440 us range corresponding to the standard liquid: 146.5 us/cm
A scale of 0-4400 to us and the corresponding standard fluid: 0-2000 parts per million (PPM) range 1413 us/cm
0-44000 us range corresponding to the standard liquid: 12.88 mS/cm
6, fast calibration button once the calibration indicator light green flashing, transmitter into the calibration standard process
(this process is 30 seconds long), after the calibration indicator light green normally on 20 seconds, and then prompt the yellow flashing 20 seconds to save the calibration data.
7, electrode quality inspection (automatic) and data:
If electrode damage in the process of calibration, electrode do not match, the calibration red and green lights flashing alarm, flashing lights extinguished, 20 seconds after the end of the calibration, the calibration data is not saved.
If the electrode trouble-free, during the process of calibration transmitter automatically stored at this time of the calibration data, calibration yellow light is normally on 20 seconds, the end of the calibration.


Can you produce according to the samples or drawings?

Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.


What is the lead time?

For standard models, lead time is about 3~5 days after order confirmed and payment received.

For OEM orders, the delivery is about 2~3 weeks after data confirmed and payment received.


How to solve the quality problems after sales?

Take photos or videos of the problems and send to us.

We will make a satisfied solution for you within 24 hours after we confirm the problems

leave a message
For any request of information or technical support, fill in the form. All fields marked with an asterisk* are required.

Related Products

SCH-AS PM 2.5 Dust PM Sensor gas sensor
♦Digital tube display, intuitive andconvenient ♦High accuracy 4 in 1 probe fortempeature, humidity, PM2.5PM10 measurement ♦Small volume, wall mountedflexible installation, easy to use ♦Full range temperature andhumidity compensation mea-surement,5~25vdc wide V-oltage design
View More
Smart Ceiling Mounted Alarm System Sensor
♦Advanced Motion Sensor, 120° detection angle, 5m detection distance, can achieve real-time monitoring day or night. ♦Emergency Alert Push Function,When there is movement detected, the alert notifications will be pushed to your phone, be aware of what's happening at home even when you're away. ♦History Records Tracking,You can track the history of sensor activities. ♦Strong Performance & Ultra-long Standby Time,Long transmission distance, high sensitivity, and strong network signal. Ultra-long standby time.
View More
360 degree parking sensor monitoring system
♦4 sensor system, advanced chipset for enhanced coverage and detection (0.3-2.5m); ♦With digital colored LEDdisplay (number & light); ♦Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle; ♦Detect small children and low walls as well; ♦Small, exquisite and beautiful appearance;
View More
Wifi Smart Temperature and humidity Sensor
♦High precision:  High precision of the measurement data.♦ Real-time monitoring and recording: Record the temperature and humidity changes on the APP.♦Scene linkage: The sensor can be used as a temperature and humidity data source, which allow you do many automated processes based on it.♦Third-party voice support: The sensor supports Alexa, Google Home Assistant. You can check the current temperature and humidity by voice.
View More
Indoor Digital Thermometer Humidity Monitor
● Small and portable design with a large screen;●A wide temperature range from -58°F to 158°F (-50°C ~ 70°C);● Read humidity and temperature levels so that you can regulate your household for maximum comfort;● Table stand and a magnetic backing for optimal placement;● Measures current readings and compares to daily records so you know how to best prepare for the day;●You can simply reset the temperature and humidity.
View More
Digital Display Temperature and Humidity Recorder
♦High measurement accuracy; ♦Built-in high-performance microprocessor; ♦Multiple probe options; ♦Integrated use of temperature and humidity; ♦Superior performance and long-term stability.
View More
SCH-URT RS485 Ultraviolet radiation transmitter
●Highly sensitive probe,built-in hardcover probe,built-in waterproof strip design,four-core waterproof shielded cable. ●All-aluminum casing,not easy to age,high precision,strong corrosion resistance.good stability,good durability,good heat resistancesg. ●IP67 level protection,It can be used in outdoor rain and snow environment for a long time,waterproof and moisture-proof,swtrong anti-interference,asccurate data measurement. ●Active data reporting is supported,check data at any time,free cloud platform,stable performance,accurate measurement. ●Measurement data is more convenient,low power consumption,stable performance,wireless transmission signal.
View More
Digital Wind Speed Anemometer Wind Speed Sensor
♦Low starting threshold ♦Overall carbon fiber materia ♦Various output signals optional ♦Strong corrosion resistant ability
View More

Need Help? Chat with us

leave a message
For any request of information or technical support, fill in the form. All fields marked with an asterisk* are required.