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Topic: Need a low-flow sensor for liquid measurement  (Read 286 times) previous topic - next topic

RushanArshad

For a project, I want to select low-flow sensor that can measure liquid from as low as 5ml/hr to 100ml/hr or higher. Can anyone suggest me arduino compatible sensors for this purpose? I have seen a sensor from Sensirion but I'm not sure if its compatible with Arduino or not.

Looking forward to hearing from you all.

 

Kevin77

How thick is the tube it is going to flow through?

Robin2

I have seen a sensor from Sensirion but I'm not sure if its compatible with Arduino or not.
Post a link to its datasheet

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

RushanArshad

How thick is the tube it is going to flow through?
Its a few mms. Basically a catheter.

RushanArshad

Post a link to its datasheet

...R
Heres the link to its datasheet. https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/Liquid_Flow_Meters/Sensirion_Liquid_Flow_Meters_LD20_Preliminary-Datasheet_V1.pdf

Robin2

Quote from the datasheet
Quote
Digital  communication  between  a  master  and  the LD20sensor  runs  via  the standard  I²C interface.
That should work fine with an Arduino.

I was hoping they might be suitable for measuring diesel fuel - but I doubt it.

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

dave-in-nj

volume is not velocity.
volume is the result of velocity times area.

most velocity sensors have a range in which they are accurate and you may need to alter your area (duct size or pipe diameter) in order to get the velocity into the best range for the sensor.

thermal flow sensors are very accurate at slow velocities and loose resolution at higher velocities.
the mass sensors usualy come in fixed pipe diameters and offer you a way to select by choosing volume.


RushanArshad

Quote from the datasheet
That should work fine with an Arduino.

I was hoping they might be suitable for measuring diesel fuel - but I doubt it.

...R
Yes this should be fine with water and other liquids but not fuels. They have not mentioned that they are compatible with Arduino so thats why i have a confusion.

winkj

Hi Rushan,

I wrote Arduino drivers for Sensirion flow sensors, which should support the LD20 sensor: https://github.com/winkj/arduino-sflow.

Note that if you're using a 5V Arduino, you may have to use a logic level shifter (e.g. https://www.sparkfun.com/products/12009) as the LD20 is spec'ed at 3.3..3.7V only.

RushanArshad

Hi Rushan,

I wrote Arduino drivers for Sensirion flow sensors, which should support the LD20 sensor: https://github.com/winkj/arduino-sflow.

Note that if you're using a 5V Arduino, you may have to use a logic level shifter (e.g. https://www.sparkfun.com/products/12009) as the LD20 is spec'ed at 3.3..3.7V only.
Thank You very much brother. Have you worked with these LD20 sensors? Which are other options of low flow sensors? I was searching from where to buy in UK, so if you could tell e from where can i buy and price?

winkj

Thank You very much brother. Have you worked with these LD20 sensors? Which are other options of low flow sensors? I was searching from where to buy in UK, so if you could tell e from where can i buy and price?
I worked with the LS32-1500, which should be compatible.

For purchasing options it's best to ask the local representation of the manufacturer of the part you want to buy; they're gonna be in the best position to help with that.

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