Turbidity Sensor Module Kit – High-Precision Liquid Clarity Testing Sensor for Arduino, Water Quality Monitoring, and Smart Home Automation

Product Description The Turbidity Sensor Module Kit is a specialized analytical tool designed to measure the clarity or cloudiness of liquids by calculating the level of suspended particles. It operates on the principle of light transmission and scattering between an infrared transmitter and receiver. As the density of suspended solids in the water increases, the light transmission decreases, providing a corresponding voltage change. This module features a dual-output design, providing a precise Analog (AO) signal for detailed water quality mapping and a Digital (DO) signal for simple threshold-based "clean vs. dirty" detection. It is the industry-standard choice for smart washing machines, dishwashers, and environmental water quality monitoring projects using Arduino or ESP32.

Key Features

• Dual Output Modes: Supports both Analog output for quantitative measurement (NTU) and Digital output for rapid threshold switching.

• On-board Calibration: Features a multi-turn potentiometer to adjust the digital sensitivity for various liquid types.

• Non-Invasive Sensing: Encased in a protective waterproof housing that allows the probe to be submerged without damaging the internal electronics.

• Integrated Processing: The module board includes high-speed comparator circuitry to ensure clean and stable digital signals.

• Wide Temperature Operation: Specifically designed to function in both cold and hot water environments (up to 90°C), ideal for home appliance automation.

Technical Details

• Operating Principle: Uses the ratio of transmitted and scattered light at 880nm (Infrared) to determine the Nephelometric Turbidity Unit (NTU).

• Analog Resolution: The output voltage ranges from 0V to 4.5V; higher clarity results in higher voltage, while murky water results in lower voltage.

• Digital Threshold: The LM393 comparator IC provides a TTL-level signal that toggles when the turbidity exceeds the user-set limit.

• Waterproof Probe: The sensing head is designed with high-quality resin sealing to prevent moisture ingress during long-term submersion.

• Power Efficiency: Draws approximately 30-40mA, making it suitable for continuous monitoring without significant heat build-up.

• Refractive Index Stability: Optimized to maintain accuracy despite minor variations in liquid refractive index or ambient temperature.

• Signal Smoothing: The driver board includes internal RC filtering to reduce noise caused by air bubbles or moving water.

• Wiring Pinout: Standard XH2.54 3-pin interface: V (VCC), G (GND), and A/D (Signal Output).

• Probe Construction: Durable ABS plastic housing resistant to common household detergents and light chemicals.

• Update Frequency: Capable of real-time monitoring with a response time of less than 0.5 seconds for instant feedback.

• Logic Compatibility: The analog signal is 5V-scale, which can be easily stepped down for 3.3V microcontrollers using a voltage divider.

• Detection Spectrum: Specifically tuned to detect suspended particles such as silt, clay, organic matter, and microscopic organisms.

• Self-Check Feature: The infrared beam remains active as long as power is applied, allowing for easy verification of sensor status.

• Mounting Versatility: The probe can be mounted vertically or horizontally in pipes, tanks, or wash basins.

• Long-Term Reliability: Optoelectronic components are rated for over 10,000 hours of continuous operational life.