To clarify, the theoretical dialectic capacitance of distilled water is 0.348 nF. The air gap dialectic capacitance of the electrode is unknown?

Hello! Regarding the "electrode air gap dialectical capacitance" you mentioned, it is not included in our product production technical indicators, so we are very sorry that we cannot answer this question for you.

Will it read through black plastic waist water tank on trailer

Hi! It can read through the outer wall of non-metallic containers with a thickness of less than 13 mm. If the wall thickness of the black plastic waste tank on your trailer exceeds 13 mm, it is likely to be unreadable. The following is the Wiki of this product for reference: http://www.cqrobot.wiki/index.php/Non-Contact_Water/Liquid_Level_Sensor_SKU:_CQRSENYW001

Will this work on the outside of a curved 15 gallon hdpe water reservoir? i have some of thhe optical sensor but want to switch containers.

Hello! Just make sure that its outer wall meets the requirements for use. You can refer to the following wiki for this product: http://www.cqrobot.wiki/index.php/Non-Contact_Water/Liquid_Level_Sensor_SKU:_CQRSENYW001

Can I extend the wires? Is it better to lengthen wires between sensor cb and rPi or sensor cb and sensor?

Hello! If you need to extend the wire, it is recommended to lengthen the wire between the sensor cb and RPi so that the sensing sensitivity of the sensor is not affected too much.

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CQRobot Ocean: Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Liquid, Agriculture, Gardening, etc.

CQRobot Ocean: Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Liquid, Agriculture, Gardening, etc.

Product ID: 313857544

Details

Brand
CQRobot
Item weight
0.05 Kilograms
Material
Acrylonitrile
Maximum supply voltage
5 Volts (DC)
Style
Non-Contact

⚡Dual voltage output (3.3V/5V)

📏12mm sensing distance

🔧Plug & play with Arduino & Raspberry Pi

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R932

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In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Level up your liquid sensing game—contactless, precise, and ready for any challenge!

ADAPTIVE VOLTAGE OUTPUT - Easily switch between 3.3V and 5V output via DIP switch for seamless integration with your favorite microcontrollers.
ROBUST SIGNAL PROCESSING - Advanced chip tech filters out electromagnetic and power frequency interference for ultra-stable, reliable readings.
PRECISION NON CONTACT SENSING - Detect liquid levels through plastic, glass, and ceramic with up to 12mm penetration—no container modifications needed.
VERSATILE LIQUID COMPATIBILITY - Safely monitor toxic chemicals, strong acids, alkalis, and even powders without sensor contamination or damage.
EFFORTLESS INSTALLATION INTEGRATION - Lightweight (50g) and compact design ensures quick setup in industrial, agricultural, or aquarium environments—get your project live faster.

The CQRobot Ocean Non-Contact Water/Liquid Level Sensor offers high-sensitivity, interference-resistant detection of liquid levels through non-metallic containers up to 12mm thick. Compatible with Arduino, Raspberry Pi, and other motherboards, it supports dual voltage outputs (3.3V/5V) and is ideal for industrial, agricultural, aquarium, and chemical applications requiring safe, non-invasive liquid monitoring.

Specifications

ASIN	B07ZMHJ6NN
Best Sellers Rank	#110,269 in Computers ( See Top 100 in Computers ) #1,745 in Single-Board Computers
Brand Name	CQRobot
Customer Reviews	4.4 4.4 out of 5 stars (66)
Item Weight	0.05 Kilograms
Manufacturer	CQRobot
Material Type	Acrylonitrile Butadiene Styrene
Maximum Supply Voltage	5 Volts (DC)
Model	CQRSENYW001
Mounting Type	Surface Mount
Output Type	digital
Part Number	CQRSENYW001
Response Time	500 Milliseconds
Sensing Distance	13 Millimeters
Specific Uses For Product	industrial production, aquarium, chemical liquid, agriculture, gardening
Style Name	Non-Contact Liquid Level Sensor
Upper Temperature Rating	105 Degrees Celsius

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