Suggest a good sensor for sensing waste level

[anindyamitra15]

A good sensor arrangement (apart from the Ultrasonic sensor currently used) that can measure the level or volume of the waste accumulated in the vat.

• The existing problem with ultrasonic sensor: It is a cheap and beginner-friendly solution but it may get affected by waste content splashing on the sensor itself.
• Here are some constraints that are expected to be followed:

1. The choice should be economic
2. It is okay to penalize a bit of accuracy for reliability/robustness
3. The sensor should be easy to implement (readily available solution or a custom solution that doesn't involve much production complexity)
4. Immune to splashes, fluctuating light intensity, or other interferences

[arnabdas01]

We can use ultrasonic sensors for volume measurement. In that case, we need to conceal the sensor module inside a cover that will save the PCB of the module from moisture or some liquid. Also, we can cover the transmitter and receiver with a speaker grill cloth. You can refer to this for an idea.

[anindyamitra15]

Sounds good!
Can you provide the link to the source for that image?

[arnabdas01]

Here it is: https://sensoneo.com/product/smart-sensors/