Precise Water Quality Analysis
The sensor works by sending a beam of light through the water probe. The more suspended particles (dirt, mud, plankton) in the water, the less light reaches the receiver. This change is converted into an electrical signal, allowing your microcontroller to determine how “clean” or “dirty” the water is.
Dual Output Modes
This adapter board is versatile. It offers both:
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Analog Output (0-4.5V): Provides a continuous reading of turbidity levels, perfect for data logging and precise analysis.
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Digital Output (High/Low): Triggers a signal when turbidity exceeds a certain limit. You can adjust this threshold using the onboard blue potentiometer (trimmer).
Easy Integration
Designed for the “Gravity” interface, it comes with a plug-and-play 3-pin cable. It operates on standard 5V DC and consumes very low power (<40mA), making it compatible with Arduino UNO, Mega, and Raspberry Pi (with ADC).
Key Features
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Function: Measures liquid clarity/turbidity levels.
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Fast Response: Readings settle in under 500ms for real-time monitoring.
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Adjustable Sensitivity: Onboard potentiometer to set the trigger point for Digital Mode.
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Waterproof Probe: The plastic sensor head is designed for submersion (Note: Do not submerge the electrical connector/top cap).
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Low Power: Efficient design consuming typically 40mA.
Technical Specifications
| Specification | Details |
| Model | 4090 |
| Operating Voltage | 5V DC |
| Operating Current | 40mA (Max) |
| Response Time | < 500ms |
| Insulation Resistance | 100MΩ (Min) |
| Output Method | Analog (0-4.5V) / Digital (High/Low) |
| Operating Temperature | 5°C ~ 90°C |






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