TDS/EC Sensors — Pack of 5 Analog TDS Meter Sensors

Key Features

• High-Precision Measurement: Provides stable and accurate readings of water TDS/EC levels.

• Analog Output: Easy interface with Arduino, ESP32, STM32, and other microcontrollers.

• Corrosion-Resistant Probe: Long-life stainless steel probe ensures durability in wet environments.

• Temperature Compensation: Built-in circuitry helps reduce reading errors caused by temperature changes.

• 5-Piece Pack: Ideal for multi-sensor setups, classroom labs, IoT systems, or bulk purchases.

• Plug-and-Play: Includes signal board + detachable probe for easy installation.

Typical Technical Specifications

(Values may vary slightly by model)

• Supply Voltage: 3.3V – 5V

• Output Type: Analog voltage (0–2.3V typical)

• TDS Measurement Range: 0 – 1000 ppm (some models support up to 3000 ppm)

• EC Measurement Range: 0 – 20 mS/cm (approx.)

• Temperature Compensation: ~25°C reference

• Probe Type: Stainless steel immersion probe

• Cable Length: 60–100 cm (depending on version)

• Signal Board: Built-in op-amp & filtering circuit

Applications

• Hydroponics nutrient monitoring

• Drinking-water quality testing

• Aquaculture and aquarium ecosystems

• Laboratory experiments & school science kits

• Water purification and filter performance testing

• IoT water-monitoring systems

• Smart agriculture

How It Works

The TDS/EC sensor measures the electrical conductivity of water, which correlates with the concentration of dissolved ions. The onboard signal-conditioning board converts this into a clean analog voltage that a microcontroller can read and convert into EC (mS/cm) or TDS (ppm) using simple formulas.