Conductivity / TDS Sensor (Online Conductivity Cell)
The Conductivity / TDS Sensor is an online electrical conductivity sensor designed for continuous
water quality monitoring. It is widely used in aquaculture, RO plants, water treatment systems,
industrial process monitoring, and laboratory applications.
This low-cost conductivity sensor offers reliable accuracy and is easy to integrate with
Arduino, Raspberry Pi, PLC, and microcontroller-based systems.
Operation – Conductivity / TDS Sensor
The electrical conductivity (EC) sensor measures the ability of water to conduct electricity.
This conductivity depends on the concentration of dissolved ions such as salts, minerals, and metals.
Higher ion concentration results in higher conductivity.
Technical Specifications – Conductivity / TDS Sensor
- Measurement Range: 000 to 9999 µS/cm (MCM)
- Resolution: 1 µS/cm
- Accuracy / Tolerance: ±1%
- Output Signal: Sine wave
- Operating Voltage: 5 V DC
- Sensor Size: 16 × 110 mm
- Body Material: PP / ABS
What is TDS?
TDS (Total Dissolved Solids) represents the total concentration of dissolved substances in water.
It is expressed in PPM (Parts Per Million).
These dissolved solids typically include salts, minerals, and metals—most commonly
sodium, calcium, and magnesium salts. TDS meters estimate this value based on the
electrical conductivity of the water.
What is Conductivity?
Conductivity indicates the presence of ions in water. The more ions present, the better the water
conducts electricity. Conductivity is measured in µS/cm (micro-Siemens per centimeter).
TDS meters convert conductivity into PPM using a standard conversion factor.
Water Quality Interpretation
Water with a TDS value of zero (such as DM or distilled water) does not automatically mean it is
free from pesticides, hormones, or pharmaceutical residues.
This is because TDS meters only measure ionic substances.
Many harmful organic compounds do not form ions and therefore cannot be detected by conductivity
or TDS measurement.
Buy Conductivity / TDS Sensor Online
Applications
- RO & Water Treatment Plants
- Aquaculture & Fish Farming
- Industrial Process Monitoring
- Laboratory Testing
- Arduino & Embedded Projects
Our Other Websites
- www.phmeters.in – pH Meters, Conductivity Meters & Controllers
- www.Salt-Spray-Chamber.in – Salt Spray Chambers & Safety Light Curtains
- www.Water-Tank.in – Overhead & Chemical Storage Tanks
- YouTube Channel
-
Like our MCS Facebook Page for Offers & Updates
-
Robotech Learning Channel
– Video tutorials for industrial products
Frequently Asked Questions (FAQ)
1. What is the difference between Conductivity and TDS?
Conductivity measures the ability of water to conduct electricity due to dissolved ions and is
expressed in µS/cm.
TDS (Total Dissolved Solids) is an estimated value derived from conductivity and is expressed in PPM.
TDS represents the total amount of dissolved salts and minerals in water.
2. Does this sensor directly measure TDS?
No. The sensor measures electrical conductivity.
TDS is calculated from conductivity using a conversion factor, typically between 0.5 to 0.7,
depending on the type of dissolved salts.
3. What is the measurement range of this Conductivity / TDS Sensor?
The sensor measures conductivity from 000 to 9999 µS/cm with a resolution of 1 µS/cm
and an accuracy of ±1%.
4. What type of output does the sensor provide?
The sensor provides a sine wave output, which is suitable for signal conditioning circuits,
microcontrollers, PLCs, and industrial controllers.
5. What power supply is required?
The sensor operates on 5 V DC, making it compatible with Arduino, Raspberry Pi,
and embedded systems.
6. Can this sensor be used for continuous online measurement?
Yes. This is an online conductivity sensor designed for continuous monitoring in water
treatment plants, RO systems, aquaculture, and industrial processes.
7. Is the sensor suitable for industrial environments?
Yes. The sensor body is made of PP / ABS, offering good chemical resistance and durability
for industrial and field applications.
8. Can this sensor detect pesticides or harmful chemicals?
No. Conductivity and TDS sensors only detect ionic substances.
Many pesticides, pharmaceuticals, and organic contaminants are non-ionic and cannot be detected
using conductivity measurement.
9. What applications is this sensor commonly used for?
This sensor is widely used in RO plants, water treatment systems, aquaculture, laboratories,
industrial process control, and embedded electronics projects.
10. Does the sensor require calibration?
Yes. For accurate measurement, calibration using standard conductivity solutions
(e.g. 1413 µS/cm or 5000 µS/cm) is recommended.
Keywords: Conductivity Sensor, TDS Sensor, Online Conductivity Probe,
Conductivity Cell, Online Conductivity Sensor, Water Quality Sensor
Need help choosing? Call/WhatsApp us for industrial pH/ORP solutions.
Reviews
There are no reviews yet.