Non-contact Capacitive Liquid Level Sensor (SEN0368)

Support Product Questions
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This is a placeholder topic for “Non-contact Capacitive Liquid Level Sensor” comments.

This is a non-contact liquid level sensor with status indicator and adjustable sensitivity. It can be used in liquid detection of non-metallic container or pipe(outer…

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Can we use a non contact liquid level sensor to detect interface between glycerol and biodiesel? …
for an automatic separation.

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Hi Sarah
You might just have to do the experiment. The description does say

without differentiating between different liquids.
Good luck
Cheers Bob

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4

Hi Sarah, welcome to the forum!

Unfortunately this sensor is digital only, so you wouldn’t be able to discern much other than the presence of liquid I’d say. The second pin only serves to invert the output signal if needed:

Do glycerol and biodiesel have significant capacitance differences? If so you could potentially make this work with the right sensor positioning and threshold, but you’d know much more about the chemical side of things than us.

Keen to hear more about your project :slight_smile:

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Wow! Very good. All the water level sensors that I used so far had to be immersed in water. This one is non-contact!

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Hey Rooppoor,

They definitely are a cool sensor for a lot of applications with water level sensing! From what we have seen, they are an extremely popular product.

Cheers,
Blayden

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Hi Sarah

It appears that glycerol and biodiesel are both poor conductors. This site states that when dealing with non-conductive substances, the dielectric constant (d.c.) will influence the response of a capacitance sensor. Glycerol has a d.c. of 46.5 vs about 2 to 3 for biodiesel, so you may be able to adjust the sensitivity of your sensor to detect the difference in their d.c. properties.
Good luck
Richard

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Hey Richard,

Really good info, I can imagine it is able to check the level and change in state if it was tuned to only detect a shift in the constant. Though as its a digital only output, it would only really with tuning be able to measure the presence of whatever its tuned to at the time, so it would be interesting how that can be put into practice with the project @Sarah251245 has in mind.

Cheers,
Blayden

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Hey, I’m looking to use this in an automotive application to warn of low coolant level in the overflow tank.

Does the sensor attach with an adhesive? Is the attachment flexible to attach to a spherical tank?

Is there a datasheet available with details of the electrical draw and the supply to the signal leads?

Cheers

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Hey @JAMES198605, welcome to the forums!

The sensor does not have an adhesive side and is designed to press onto the container with the included zip tie. This probably won’t be large enough for your application so you may need to consider alternate methods of securing it to the tank.

The black panel on the sensor is made of a flexible rubber-like material and should flex to fit most tank or container shapes.

Unfortunately the wiki for this product does not contain a great deal of information about the electrical draw of the signal leads. The mode pin and the in pin will both operate at the logic level of the Arduino or connected microcontroller. In the case of an Arduino, these pins will be switching between high and low (0V and 5V) signals depending on what is detected by the sensor.

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