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Author Topic: The best level sensor.  (Read 3921 times)
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Dr Caos
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« on: April 23, 2008, 05:41:01 05:41 »

Im going to build a machine that fill a bottle with soda but I need a bit of help with the fluid level sensor.
Can you tell me what sensor its the best for that purpose?
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zokij
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Nice time :)


« Reply #1 on: April 23, 2008, 08:33:41 08:33 »

 Wink Hi
First at all read this page
A Dozen Ways to Measure Fluid Level and How They Work

see more at :
http://www.sensorsmag.com/sensors/Level+and+Leak+Detection/A-Dozen-Ways-to-Measure-Fluid-Level-and-How-They-W/ArticleStandard/Article/detail/360729

Second if you wont low-cost way try this put on your tap:



more info about this circuit at:
http://www.uoguelph.ca/~antoon/circ/sensor3.htm

3. If you need professional type and if you have plastic bottle this is for you:


more info at:
http://www.gemssensors.com/content.aspx?id=2340&langtype=2057

4. But if I have that problem I will use some tensometric sensor or piezoelectric sensor, this is not conventional solution and you must have some electronic experience and knowledge but that is what will I do. Undecided

Have nice time  Roll Eyes
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Parmin
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Very Wise (and grouchy) Old Man


« Reply #2 on: April 24, 2008, 02:11:33 02:11 »

Fuel level sensor for car fuel tanks are easy to get.
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Dr Caos
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« Reply #3 on: April 24, 2008, 07:30:38 07:30 »

Interesting... I need a not invasive way to sense the level. So, I will use ultrasonic.
Ty
And Ty Parmin.
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zokij
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« Reply #4 on: April 24, 2008, 12:05:22 12:05 »

 Wink BTW  Roll Eyes

Here is some nice page for you  Shocked
LIQUID LEVEL TRANSMITTER/RECEIVER SYSTEM
with 16F628

at address:
http://www.vermontficks.org/pic.htm

 Roll Eyes nice time  Grin
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otter
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« Reply #5 on: April 24, 2008, 11:31:37 23:31 »

If the container is non-conductive, you could use a capacitive sensor on the outside of the container. Have a look at the Analog Devices web site for devices/app notes.
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ucup
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« Reply #6 on: April 28, 2008, 07:06:21 07:06 »

Yes, I have already sense a water in the pipe by capacitive sensor and it work. Mybe you can try it.
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LSSB
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« Reply #7 on: April 29, 2008, 09:53:54 21:53 »

I agree capacitive sensors make good level indicators. Make sure you calibrate at both full and empty container. Ultra sonic can be expensive.
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tuvoj
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« Reply #8 on: April 30, 2008, 08:57:41 08:57 »

If container is IR pass-through and liquid does not have the save dispersive qualities as air, you could also use an IR transmitter/rcvr pair to sense difference in reflectivity at a certain level, then trip some downstream logic off of this...

This would work with very little cost, and could be positioned at any level, from the outside if the container...


Cheers-Tuvo
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boss.lrc
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« Reply #9 on: May 05, 2008, 08:25:00 20:25 »

Hi zokij

Can this  LIQUID LEVEL TRANSMITTER/RECEIVER SYSTEM with 16F628 be used in a container with  gas? or there is a danger of explosion

Thanks

Regards
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zokij
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« Reply #10 on: May 08, 2008, 01:36:17 13:36 »

Hi zokij

Can this  LIQUID LEVEL TRANSMITTER/RECEIVER SYSTEM with 16F628 be used in a container with  gas? or there is a danger of explosion

Thanks

Regards

Hi boos.lrc
possibility of explosion dependence of gas kind, old petrol station was use similar sensor .... but perhaps you can use some other sensor... specify which gas you use in what application and I will try to found some nice solution for you Smiley
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juliano_cps
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« Reply #11 on: May 19, 2008, 06:35:57 06:35 »

you are going to use a commercial solution ? or do it yourself ?

if DIY: Nicera Japan manufactures selated US transducers (used in parking car radars) you'll need only one... the receiver and transmitter are the same ! Smiley

if you live in Brazil I could point you where to buy...

bye.
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« Reply #12 on: May 20, 2008, 06:09:45 06:09 »

You could also use weight. Use a cheap and simple weigh scale under the soda bottle to measure weight, convert this to volume is easy.

You will struggle with techniques to measure level as most will want to be inside the bottle and the other most common method is using differential pressure which for a soda bottle is very small.

Most bottling companies use a simple timer as the same amount of liquid will flow all the time and they are quality controlled with weight.

Cheers,
Alspa
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night_mare
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« Reply #13 on: May 31, 2008, 07:41:22 19:41 »

Dr Caos you can see this below the link

http://rapidshare.com/files/119097670/water_level.rar.html

I made it to maintain water level between two preset levels.

It works fine. Hope it can give a solution to you.
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