A TDS (Total Dissolved Solids) meter electrode is a critical sensing component used to measure the concentration of dissolved solids in a solution, typically water. The electrode functions by detecting the electrical conductivity of the liquid; since dissolved salts, minerals, and metals conduct electricity, their concentration can be correlated to TDS values in parts per million (ppm). The electrode is usually made of durable, corrosion-resistant materials such as stainless steel, titanium, or graphite to ensure accuracy and longevity in aqueous environments.

Uses:

TDS meter electrodes are widely used in water quality monitoring across multiple applications. In domestic settings, they help evaluate drinking water purity from RO (Reverse Osmosis) systems or filters. In industrial environments, they are applied in wastewater treatment, aquaculture, hydroponics, boilers, and cooling towers to maintain optimal water chemistry. In laboratories, electrodes are utilized for analytical studies requiring precise dissolved solid concentrations. Their portability and real-time measurements make them invaluable for field testing as well.

Technical Specifications (typical values; may vary by manufacturer):

Measuring range: 0 – 10,000 ppm (some advanced models up to 100,000 ppm).
Accuracy: ±2% of reading or better.
Resolution: 1 ppm (for low-range meters), 10 ppm (for higher ranges).
Cell constant (K): 0.5, 1.0, or 10.0 depending on the application.
Temperature compensation: Automatic (ATC), typically 0 – 60 °C.
Electrode material: Stainless steel, titanium, or graphite with protective housing.
Connector type: BNC, pin, or proprietary plug depending on the instrument.
Response time: < 10 seconds for stable readings.
Operating life: Typically 1 – 2 years under normal usage, replaceable when calibration drifts.

In conclusion, the TDS meter electrode is a robust, versatile sensor enabling fast and reliable monitoring of dissolved solids in water systems. Its performance depends on material construction, proper calibration, and compatibility with the measurement environment.