can this be mounted to the lid of a bucket and read the water levels inside as they go down? or is this basically a contact switch that detects liquid

It's just a liquid contact switch.

Is there a Fritzing (or other schematic app) component that I can download for this product?

Hello , For specific product descriptions, you can log in to our official link address to view, hope it will be helpful to you, if you have any questions, please contact me in time, thank you! Wiki: http://www.cqrobot.wiki/index.php/Liquid_Level_Sensor

What is vin vs in for the breakout board? which pin varies when in contact with water? i assuming one connects to the 5v and other varies voltage?

Hi! It is recommended that you refer to the technical information of this product (Wiki: http://www.cqrobot.wiki/index.php/Contact_Water/Liquid_Level_Sensor_SKU:_CQRSENYW002). If you have any questions, please feel free to contact us!

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💧 Elevate your irrigation game with pinpoint precision and effortless smart control!

BUILT TO ENDURE - Corrosion, high pressure, and temperature resistant for rugged outdoor use.
FLEXIBLE INSTALLATION - Mount it up, down, sideways, or diagonally—sensor adapts to your setup.
SMART ALERTS CONTROL - DIP switch adjustable output voltage with alarm-ready detection to prevent spills and dryness.
PRECISION YOU CAN TRUST - Detects liquid levels with ±0.5mm accuracy for flawless automation.
PLUG PLAY COMPATIBILITY - Seamlessly integrates with Raspberry Pi and Arduino for smart DIY projects.

The CQRobot Contact Water/Liquid Level Sensor is a compact, photoelectric sensor designed for precise liquid level detection with ±0.5mm accuracy. Compatible with Raspberry Pi and Arduino, it features corrosion and temperature resistance, low power consumption, and flexible multi-orientation mounting. Ideal for automatic irrigation, aquariums, and agricultural applications, it offers adjustable output voltage and alarm functions for reliable, maintenance-free operation.

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Manufacturer	CQRobot
Part number	CQRSENYW002
Item Weight	50 g
Product Dimensions	21 x 3.6 x 7.11 cm; 50 g
Item model number	CQRSENYW002
Size	Liquid Level Sensor
Colour	Contact
Style	Single Point Contact Type
Material	silicone pc
Power source type	Corded Electric
Voltage	5 Volts
Item Package Quantity	1
Measurement Accuracy	±0.5mm
Plug profile	Wall Mount
Specific uses	Automatic Irrigation Systems, Aquariums, Plants, Garden, Agriculture, Alarm Function
Batteries included?	No
Batteries Required?	No

CQRobot Contact Water/Liquid Level Sensor Compatible with Raspberry Pi/Arduino. for Automatic Irrigation Systems, Aquariums, Plants, in the Garden, in Agriculture etc.

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