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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.
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.
Technical details for the turbidity sensor module.
| Operating Voltage | 5V DC |
|---|---|
| Operating Current | 40mA (MAX) |
| Response Time | <500ms |
| Insulation Resistance | 100M (Min) |
| Output Method | Analog/Digital |
| Analog Output | 0-4.5V |
| Digital Output | High/Low-level signal (threshold adjustable by potentiometer) |
| Operating Temperature | 5℃~90℃ |
| Storage Temperature | -10℃~90℃ |
| Weight | 30g |
| Adapter Dimensions | 38mm × 28mm × 10mm / 1.5in × 1.1in × 0.4in |
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.
It measures water turbidity, which helps indicate water clarity and quality by detecting changes related to suspended particles in the liquid. It is intended for water quality monitoring applications such as rivers, streams, and wastewater systems.
Yes, it is designed for Arduino use and supports both analog and digital output modes. The reference examples show analog reading on A0 and digital reading on pin 2.
The sensor operates at 5V DC and has a maximum operating current of 40mA. Its analog output range is 0 to 4.5V.
The module has a D/A switch: in analog mode, the output value decreases in liquids with higher turbidity; in digital mode, it outputs a high or low signal. In digital mode, the trigger threshold can be adjusted using the onboard potentiometer.
The specified response time is under 500ms. The operating temperature range is 5℃ to 90℃, and the storage temperature range is -10℃ to 90℃.
The adapter board dimensions are 38mm × 28mm × 10mm, and the listed weight is 30g. This compact size makes it suitable for embedded water monitoring setups.
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