TDS Sensor
TDS Sensor is an industrial water-quality sensor used with digital TDS meters, online TDS indicators, TDS controllers and conductivity-based instruments for measuring Total Dissolved Solids in water. UMA Industries supplies TDS sensors, conductivity sensors, online TDS meters, TDS controllers, pH meters, pH controllers and industrial water-quality instruments for RO plants, DM plants, ETP/STP plants, cooling towers, boiler-water systems and process-water applications.
A TDS sensor detects the electrical conductivity of water and helps the connected instrument calculate the TDS value in ppm or mg/L. It is suitable for monitoring dissolved salts, minerals and ionic impurities in water-treatment and industrial process systems.
The TDS Sensor is commonly used as a replacement sensor for online TDS meters where the existing sensor becomes scaled, damaged, unstable or inaccurate due to long-term operation in process water.
Technical Specifications of TDS Sensor
- Product Name: TDS Sensor
- Sensor Type: Conductivity-based TDS sensor
- Measurement Parameter: TDS / Total Dissolved Solids
- Compatible Instruments: Digital TDS meter, online TDS meter, TDS controller and conductivity meter
- Application: RO water, DM water, process water, cooling water, treated water and industrial water
- Mounting Type: Threaded process mounting
- Body Type: Industrial sensor body
- Connection: Cable output for connection with compatible TDS instrument
- Use Area: RO plant, DM plant, ETP plant, STP plant, cooling tower, boiler-water treatment and process-water monitoring
- Installation: Pipeline, flow cell, sample line or tank mounting as per system requirement
What is TDS Sensor?
TDS Sensor is the sensing part of a TDS measuring system. It is installed in water or process liquid and connected to a digital TDS meter or TDS controller. The sensor detects conductivity changes in water, and the connected instrument converts this signal into a TDS value.
TDS means Total Dissolved Solids. It represents the dissolved salts, minerals and ionic impurities present in water. In RO plants and industrial water-treatment systems, TDS monitoring is important for checking feed water, treated water, reject water and final-water quality.
Applications of TDS Conductivity Probe sensors
RO Plants
RO plants use TDS Conductivity Probe sensors for feed water, permeate water, reject water and final treated-water monitoring. The sensor helps operators check RO membrane performance and treated-water quality.
DM Water Plants
DM water plants use TDS and conductivity sensors for checking ionic impurities and treated-water quality in demineralised water systems.
ETP Plants
Effluent-treatment plants use TDS Conductivity Probe sensors for monitoring treated effluent, discharge water and process-water quality.
STP Plants
Sewage-treatment plants use TDS Conductivity Probe sensors for treated-water monitoring, reuse-water checking and final-discharge observation.
Cooling Towers
Cooling-tower systems use TDS Conductivity Probe sensors for blowdown control, chemical-treatment checking, scaling control and water-conservation planning.
Boiler Water Treatment
Boiler-water treatment systems use TDS monitoring to reduce scaling, corrosion and process disturbance. A TDS Conductivity Probe sensors supports proper feed-water and blowdown management.
Food and Beverage Industries
Food and beverage industries use TDS Conductivity Probe sensors for treated water, process water, cleaning-water systems and quality-control applications.
Pharmaceutical Utilities
Pharmaceutical plants use TDS and conductivity sensors for RO water, DM water, purified-water support systems and process utilities.
Chemical and Process Industries
Chemical industries use TDS Conductivity Probe sensors for process water, wastewater, chemical dilution, washing systems and treated-water monitoring.
Industrial Automation Panels
System integrators and panel manufacturers use TDS Conductivity Probe sensors with online TDS meters, PLC panels, SCADA systems and remote water-quality monitoring systems.
Why Choose Our TDS Conductivity Probe sensors?
- Suitable for online TDS measurement
- Compatible with digital TDS meters and TDS controllers
- Useful for RO, DM, ETP, STP and cooling-tower applications
- Suitable for replacement of old or damaged TDS sensor
- Industrial threaded design for process mounting
- Supports continuous water-quality monitoring
- Useful for automation panels and water-treatment systems
When Should You Replace a TDS Sensor?
- Reading is unstable even after calibration
- Reading is incorrect compared with standard solution
- Sensor has heavy scaling or deposits
- Sensor cable is damaged
- Sensor body or electrode area is physically damaged
- Calibration cannot be completed correctly
- TDS meter display changes randomly without water-quality change
- Sensor response becomes very slow
Compatible TDS and Water Quality Instruments
- Digital TDS Meter Online – For continuous TDS measurement in water-treatment systems.
- TDS Meter Modbus RTU RS485 – For PLC, HMI, SCADA and data-logging applications.
- Digital pH Meter Online – For continuous pH measurement in water and process liquids.
- pH Meter with 4-20 mA Output – For PLC, recorder and SCADA systems.
- RS485 Modbus RTU pH Controller – For PLC, HMI and SCADA integration.
- pH Controller with One Relay – For chemical dosing and alarm applications.
View more instruments in our pH Meter product category.
Installation Instructions for TDS Sensor
- Install the TDS sensor in a proper flow cell, sample line, pipeline or tank connection.
- Ensure continuous water contact around the sensor tip.
- Avoid installation where air bubbles are continuously present.
- Install the sensor at a location where water flow is stable.
- Keep the sensor cable away from motor, VFD and high-voltage wiring.
- Use compatible fittings and seal properly to avoid leakage.
- Do not overtighten the threaded sensor body during installation.
- Provide easy access for cleaning, calibration and replacement.
- Confirm sensor compatibility with the connected TDS meter before installation.
Calibration Procedure for TDS Sensor
- Connect the TDS sensor to the compatible TDS meter or controller.
- Switch ON the instrument and allow the reading to stabilise.
- Clean the sensor before calibration.
- Use a standard TDS or conductivity calibration solution.
- Dip the sensor into the standard solution.
- Wait until the displayed reading becomes stable.
- Adjust the calibration setting according to the standard solution value.
- Rinse the sensor with clean water after calibration.
- Recheck the reading to confirm calibration accuracy.
Cleaning and Maintenance of TDS Sensor
- Clean the TDS sensor regularly according to water contamination.
- Remove scaling, deposits or sludge from the sensing area.
- Use suitable cleaning method according to process contamination.
- Do not damage the sensing surface during cleaning.
- Check cable condition regularly.
- Recalibrate the instrument after sensor cleaning.
- Replace the sensor if calibration does not become stable after cleaning.
Work Instructions and Precautions
- Do not run sensor cable with power cable in the same conduit.
- Do not expose the sensor to incompatible chemicals.
- Do not install the sensor where dry running is frequent.
- Do not apply mechanical force to the sensor cable.
- Protect the connected instrument from water splash and chemical fumes.
- Check leakage after threaded installation.
- Use correct range and calibration solution for the application.
- Verify readings with standard solution before replacing the instrument.
Difference Between TDS Sensor and Conductivity Sensor
A conductivity sensor measures the electrical conductivity of water. A TDS sensor is generally conductivity-based and is used with a TDS meter that converts conductivity into a TDS value. Conductivity is normally displayed in µS/cm or mS/cm, while TDS is normally displayed in ppm or mg/L.
Difference Between TDS Sensor and TDS Meter
The TDS Sensor is the sensing part installed in water. The TDS meter is the display and processing instrument that reads the sensor signal and shows the TDS value. Both sensor and meter must be compatible for correct measurement.
Industries Using TDS Sensor
- RO plant manufacturers
- DM plant manufacturers
- ETP and STP contractors
- Water-treatment companies
- Pharmaceutical industries
- Food and beverage industries
- Chemical industries
- Textile and dyeing industries
- Cooling-tower water-treatment companies
- Boiler-water treatment companies
- System integrators and automation companies
- Control-panel manufacturers
7 Powerful Benefits of TDS Sensor
- Reliable sensing for online TDS measurement
- Suitable for RO, DM, ETP and STP plants
- Useful for continuous water-quality monitoring
- Compatible with TDS meters and TDS controllers
- Supports process-water and treated-water monitoring
- Useful replacement for old or damaged sensor
- Suitable for industrial water-treatment applications
FAQs About TDS Sensor
What is a TDS Sensor?
A TDS sensor is a water-quality sensor used with a TDS meter or controller to measure Total Dissolved Solids in water.
Where is TDS Sensor used?
It is used in RO plants, DM plants, ETP plants, STP plants, cooling towers, boiler-water systems, process-water systems and industrial automation panels.
Can this sensor be used in RO plants?
Yes, TDS sensors are commonly used in RO plants for feed water, permeate water, reject water and final treated-water monitoring.
Can this sensor be used in cooling towers?
Yes, TDS sensors can be used in cooling towers for blowdown control and water-treatment monitoring.
Can this sensor be connected to PLC?
The sensor connects to a compatible TDS meter or controller. PLC connection is possible through the meter output, such as 4-20 mA or RS485 Modbus, depending on the instrument model.
Does TDS Sensor need calibration?
Yes, calibration is required using standard TDS or conductivity solution for accurate measurement.
What is the difference between TDS and conductivity?
Conductivity is the electrical conductivity of water. TDS is a calculated dissolved-solids value based on conductivity conversion.
When should the TDS Sensor be replaced?
Replace the sensor if readings are unstable, calibration fails, cable is damaged, sensor body is damaged or readings remain incorrect after cleaning and calibration.
Do you supply TDS meters also?
Yes, UMA Industries supplies TDS sensors, digital TDS meters, online TDS meters, TDS controllers and industrial water-quality instruments.
Do you supply throughout India?
Yes, we supply TDS sensors, TDS meters, pH meters, pH controllers and water-quality instruments throughout India.
External Technical References
Business Partner and Dealer Opportunity
Dealers, distributors, RO plant manufacturers, ETP/STP contractors, water-treatment companies, control-panel manufacturers, PLC/SCADA system integrators and industrial-instrument suppliers may contact UMA Industries for business cooperation involving TDS sensors, TDS meters, pH meters, pH controllers, conductivity meters and industrial water-quality instruments.
Our Other Websites
- phmeters.in – pH meters, pH controllers, electrodes and industrial instruments.
- salt-spray-chamber.in – Salt spray chambers and corrosion-test equipment.
- water-tank.in – Water-storage and chemical-storage tanks.
- YouTube Channel – Product demonstrations and updates.
- MCS Facebook Page – Product news and updates.
- Robotech Learning Channel – Technical tutorials and product videos.
Buy TDS Sensor
Contact UMA Industries for price, sensor compatibility, range selection, installation support and correct model recommendations. We supply TDS Sensor, online TDS meters, TDS controllers, pH meters, pH controllers and industrial water-quality instruments throughout India.
Need help choosing? Call/WhatsApp us for industrial pH/ORP solutions.
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