Extinguisher - Checking Level of Liquid CO2

Surely that's a telephone call to the bottle extinguisher manufacturer's technical helpline?

....or one might even telephone the ultrasonic level sensor manufacturer's technical helpline as well.

The detector can sense the level of the liquid/gas interface. Hence, the name ultrasonic detecter.

You will still have to perform some simple guesswork to determine actual quantity of liquid in the tank.

as per my knowledge

ultrasonic transduser emits sound wave of 20 khz to 70 khz , this sound wave reflected by liquid whose level is to be measure. time between sound wave emits and reflected back is proportional to depth.

but my question is --- when the sensor placed on the bottle where liquid is present it get suddenly reflected back or it get reflected by the other bottle end after passing through liquid.

and u are not giving me the answer ur answer is my question only means u r replying me my question ... anyway thank you for ur answer.. i m sending u a vedio please watch these if u have time http://www.youtube.com/watch?v=8WgWkNvRm1Y

I'm sorry. We are not obligated to answer you. I reply to you that you are arrogant and demanding.

I suggest that you search Wiki for an answer you may understand.

Try searching for "ultrasonic transducer" and your demands will be met.

Oh, just read your previous post #11.

So, it is homework. You are not abiding by the rules, did you read the FAQ's before coming here?

Thanks for telling us that you are just trying to get others to do your work for you. Are you studying to be a manager?

Check wiki.

so you answer the person depending upon his nature

well nice judge

i don't want to comment on u but i say '' look yourself first is that u are doing right or wrong and think what i said it to u''

so easy for u to judge , r u some psychiatricst

thank for wiki

actually we are few friends over here we discuss our thought when we get stuck some where then i used post my question over here that is the only reason .

thank you once again from an arogant person...

Ultrasonic sensor - Wikipedia, the free encyclopedia

Ultrasonic detector? Why would you do that?

The tare weight of the assembled extinguisher, and the weight when fully charged, are stamped on the body. This technique is completely adequate. When the extinguisher is serviced and refilled, do you believe an ultrasonic method is used by the tech, or does he weigh them?

Oh... this is homework, isn't it?

Worse yet, what if it's not homework.

What if he just got a job in his uncles fire prevention company.

Posts from the past: "if i fix two magnets facing opposite sides each other on a small toy car then that car will move"

"what must be the speed of fan who has to lift about 1 meter to 1Kg of weight."

Maybe it's just an inquiring mind at work.

I am waiting for him to tell us this is a fire supression system aboard a spacecraft, so the weighing technique doesn't apply.

I wonder if fire extinguishers would discharge faster is a two litre bottle of soda were placed inside? It's working for kramarat.

I think two opposing pole magnets would be better, and easier to retro-fit.

You'd need some tape, too. Most FE tanks are plastic.

^{Is it beer thrity yet?}

yes it is my home work but do u know the answer

or not if not then u also do that

or if u can help me thats great if u can't thats ok

and is not my uncle's job becoz leave it don't want to say much

thank you

my friend

have u uderstand my question if not ask me again i will explain it to u

and i know about weighing method

but i want to know about ultrasonic method

anyway i have posted my knowledge check it out

thank you

as per my knowledge

ultrasonic transduser emits sound wave of 20 khz to 70 khz , this sound wave reflected by liquid whose level is to be measure. time between sound wave emits and reflected back is proportional to depth.

but my question is --- when the sensor placed on the bottle where liquid is present it get suddenly reflected back or it get reflected by the other bottle end after passing through liquid.

and u are not giving me the answer ur answer is my question only means u r replying me my question ... anyway thank you for ur answer.. i m sending u a vedio please watch these if u have time http://www.youtube.com/watch?v=8WgWkNvRm1Y

Son, you are not thinking it through. The sound will bounce back from BOTH surfaces but with a difference in time returned. One wave sent down into the bottle will reflect SOME of that wave from the surface. The original wave continues to the bottom of the bottle and reflects from there too. But the second reflection returns to the transducer behind the first reflection off the liquid surface. The difference in time is the reference for the distance between the liquid surface and the bottom of the container. The bottom will always reflect in the same amount of time. The liquid surface reflection will vary with the amount of liquid in the container.

The weight of the bottle empty versus full is still the best method!

thank you sir

Sound couples from solid to liquid more efficiently than from solid to gas. I would presume that the reflection from the inner surface of the tank is much stronger above the liquid level than below.

The level of CO2 is not checked using ultrasonic measurement. That method is used for other lower vapor pressure agents. CO2 level is checked using weight. Weigh the bottle using a calibrated scale, then subtract the tare weight. The remaining weight is the agent quantity.

coltraco company manufactures the instrument name portalevel which is used for measuring liquid level of co2 in an extinguisher ; as have posted a link in which it has been shown how to measure it.

yes i agree with u that co2 bottle wight is checked by weighing but there is also a provision of checking level by ultrasonic..