The Analog TDS Water Quality Sensor Module measures TDS (Total Dissolved Solids) in water — the total amount of minerals, salts, and other dissolved particles. A TDS sensor module like this gives you a number in ppm (parts per million) that tells you how clean or contaminated the water is. Higher ppm means more dissolved material in the sample.
The sensor outputs an analog voltage between 0 and 2.3V that microcontroller reads through an ADC (Analog to Digital Converter) pin. One non-obvious detail: temperature affects conductivity, so the sensor’s accuracy of ±10% F.S. is specified at exactly 25°C. The honest trade-off with this analog TDS sensor is that readings shift at higher water temperatures without a compensation circuit.
The analog TDS sensor for Arduino pairs with Arduino Uno, ESP32, and NodeMCU boards using a single analog input pin. Engineers building water quality monitors system, testing aquarium water, and working on IoT environment projects all find it practical. Connect VCC, GND, and the analog output pin to get started. StemVolt provide sensor board tested and ready.
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Features:
- TDS measurement range of 0 to 1000 ppm covers drinking water and aquarium monitoring.
- Output voltage of 0 to 2.3V connects directly to any standard ADC analog input pin.
- Operating voltage of 3.3V to 5.5V works with both 3.3V and 5V microcontroller boards.
- Accuracy of ±10% F.S. at 25°C gives dependable readings for water quality assessments.
Technical specifications:
| Specification | Details |
|---|---|
| Sensor Type | Analog TDS sensor |
| TDS Measurement Range | 0 – 1000 ppm |
| Output Voltage | 0 – 2.3 VDC |
| Operating Voltage | 3.3 – 5.5 VDC |
| Working Current | 3 – 6mA |
| TDS Measurement Accuracy | ± 10% F.S. (25 ℃) |
| Measure | Dissolved solids in water |
Applications:
- A drinking water checker uses this sensor to display ppm readings on an LCD screen.
- The Analog TDS Water Quality Sensor Module tracks water quality in a home RO filter system.
- An analog TDS sensor for Arduino reads ppm data and logs it to a cloud dashboard hourly.
- An IoT water station measures dissolved solids and sends live alerts over WiFi to a phone.
Package includes:
- 1 x Analog TDS Water Quality Sensor Module
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