Gravity Analog Turbidity Sensor for Arduino - 5V Analog/Digital

Overview

Gravity: Analog Turbidity Sensor for Arduino is designed for water quality monitoring applications where you need to detect the cloudiness or suspended particle content of a liquid. It is suitable for use in rivers, streams, wastewater systems, and other Arduino-based monitoring projects.

The module supports both analog and digital output modes. In analog mode, the sensor provides a voltage output that decreases when the liquid has higher turbidity. In digital mode, it outputs a high/low signal, and the switching point can be adjusted using the onboard threshold potentiometer.

This makes the sensor useful for both continuous measurement and simple trigger-based detection. With 5V operation, fast response time, and Arduino-friendly interfacing, it fits well into DIY, educational, and prototyping setups.

Features

• Designed for turbidity-based water quality monitoring
• Supports both analog and digital output methods
• D/A switch lets you select analog or digital mode
• Adjustable threshold potentiometer for digital trigger setting
• Analog output range of 0-4.5V
• Fast response time of less than 500ms
• Compatible with 5V Arduino systems

Using the Output Modes

Set the onboard switch to A for analog output when you want to read changing turbidity values through an Arduino analog pin. Set it to D for digital output when you need a simple high/low threshold trigger.

In digital mode, the threshold potentiometer lets you tune the trigger point. A reference Arduino example connects the sensor to Digital Pin 2 and uses Pin 13 LED indication: if the sensor reads LOW, the LED turns on; if it reads HIGH, the LED turns off.

Specifications

Technical details for the turbidity sensor module.

Notes

In analog mode, reference documentation notes that the output voltage falls as turbidity increases. The supplied Arduino example reads the analog signal on A0 and converts it to voltage for serial monitoring.

Important: If readings appear incorrect or remain unchanged, check the probe connection cable orientation carefully.