Selecting an ultrasonic sensor suitable for measuring sewage level

Other Hardware Sensors
1

hi dear friends
I have a problem with Selecting an ultrasonic sensor suitable for measuring sewage level
please help me
I currently use Sensor SRF-05, but I need to use a corrosion resistant sensor
There are different sensors on the market, but I do not know which one can be connected to the Arduino
:sob: :sob:
please help me in this choice

2

How far above water surface will sensor be mounted, how much level change do you expect and what kind of distance resolution do you need?

3

Alibaba has them. You will need the associated circuitry.

4

hi friends
fluid is Wastewater
My measuring range is between 30 to 300 cm and the accuracy of measuring is 1 millimeter.
But corrosion resistance is very important.
Thanks for your attention and guidance.

5

At those requirements ultrasound is out, as the minimum resolution is about 2 cm.

6

I find Ultrasonic sensors such as HRXL-MaxSonar-WR with resolation 1 mm and Distance measurement 5000 mm
But.....

I do not know if these sensors can be used with Arduino

please help me

7

For that price you can buy about 200 of the ever popular HC-SR04 sensors :slight_smile:

This one has TTL output, which is very promising for Arduino interfacing, and indeed Maxbotix has an Arduino tutorial. (convenient when others do your homework, isn't it?)

Resolution is 1 mm, accuracy is 1% (so +/-1 cm error on 1 meter, +/-3 cm error on 3 meters distance). Remember, just because you get five digits in an output, this are not necessarily significant digits. Also you're mixing up accuracy with resolution, that are two different things. Yet another related but different thing is reproducibility.

Minimum for this sensor is 30 cm for the 5-meter version so that's a match.

8

Thanks for the explanation
Please advise on choosing a waterproof sensor that has a good price

9

The Maxbotix sensor is too expensive. I bought this other waterproof ultrasonic sensor instead. For those who want more precision can go for this one instead with 4 sensors.

10

How about pressure? Stainless pressure sensors are readily available, but I doubt you’ll get the resolution you seek with any technology as you are asking for better than +/- 0.03%. Pressure typically is +/- 2%.

11

What is your backup plan for when the sensor fails? We looked at a place that had a sewage holding tank and when full the float switch would start a pump to pump the waste up and over a hill. A friend bought the place and after 3 months discovered the switch was not working and the sewage was leaking out onto the lawn.

Paul

12

I think the OP left about two years ago.

Yet another case of a first poster reviving a necrothread.

13

I hate it when that happens! I try to remember to check the date of the first post, but failure happens!

Paul