Water Quality Sensor TDS Water Quality Testing Probe

The Water Quality Sensor TDS water quality testing probe measures TDS (total dissolved solids), the amount of salts and minerals dissolved in water, by sensing its electrical conductivity. Used with a TDS signal board and an Arduino or ESP32, it lets you build your own water quality meter for drinking water, aquariums and hydroponics, and log the results over time.

Water Quality Sensor TDS Specifications

• Measures: TDS (total dissolved solids) through conductivity
• Usual unit: ppm (mg/L)
• Probe: waterproof probe head for immersion in water
• Works with: a TDS meter signal board feeding an analog input on Arduino, ESP32 and similar boards
• Calibration: against a reference TDS meter or a known calibration solution

Water Quality Sensor TDS Applications

• Checking tap, filtered and reverse osmosis (RO) water
• Monitoring nutrient strength in hydroponics
• Aquarium and fish tank water monitoring
• IoT water quality stations and school science projects

What's in the Box

• 1 × TDS water quality testing probe

Tip: Conductivity changes with temperature, so add a temperature sensor such as a waterproof DS18B20 to correct your readings. TDS does not detect bacteria or many contaminants, so treat it as a guide rather than a full safety test, and rinse the probe with clean water after use.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.