High Tech Flow Meters

[MaxxxRacer]

I was searching around the net and I came across this company that makes flow meteres that do not use any imepeller or blades to get flow rates. Which as many of you may know is quite an improvment over the flow meters that use a spinning prop moved by the water to measure the flow rate. These meters would cuase a heck of alot less resistance to the flow of the system than the other type..

anyway, here is a link to the companies flowmeter products.. apparently there are flowtubes (the sensor itself) and the flow transmitter, which collects the data.


http://www.foxboro.com/us/eng/produc.../flow/flow.htm

Bill will know alot more about this than I do and might be able to shed some light onto these flowmeters

[brucoman]

magnetic flowmeters are nothing new
use 1 here at home, donated 1 to pH as well
the good ones are large & expensive i.e mag flow meters we use at my work, for 1/2" tube run ~$2000 each
if you can find 1 with decent bore at decent price, grab it

[MaxxxRacer]

wow.. that is nuts. i knew they would be expensive.. hell, the test equipment for watercooling is 10x the price of the cooling istelf...

is the one your refering to that you gave pH the one that he uses in his test rig? He said the one in his test rig restricts his flow alot. if it were a mag one, it wouldnt restrict anything except for the size of the bore...

btw, do u have a pic of urs?

[brucoman]

is what I have (1/2" bore NOT 6" like pic), pH has an older version, square in face, that I do not think he has installed yet
for a size perspective the head alone is the size of a PC powersupply and pipe mount style is called a waffle

[BillA]

very old news indeed
I have Rosemount, Foxboro, Danfoss, Sparling and Yokogawa mag flow meters
(not prejudiced, will use anything - some can be cross matched if you have the cal #s)
only way to do serious work
I prefer 1/4" flowtubes for accuracy even though they max out at ~3.5gpm

[MaxxxRacer]

brucoman, thanks for the info.

bill, with 1/4 in a 1/2inch setup, it would provide a decent amount of restriction and would throw off the flow rates that your given by the flowmeter in the first place.

and to add to that, does having the bigger bore on teh sensor make it less acurate?

[BillA]

search here, danfoss
its in a test loop, not a WCing system
take the dP of any component, use that component in the system and take dP readings and the flow is then known in a non-obtrusive manner

all this has been posted several times

[brucoman]

most 1/2 tubes start ~.5gpm go up to ~20gpm
I have a shelf full of used 1/4 ceramic tubed Yok AE100's....waiting for authorization to dispose of

[BillA]

Originally Posted by brucoman

most 1/2 tubes start ~.5gpm go up to ~20gpm
I have a shelf full of used 1/4 ceramic tubed Yok AE100's....waiting for authorization to dispose of

let me know . . . .
Thanks

[nexxo]

For £85,-- ish you can buy an ultrasonic flowmeter from Gentech. It is a self-contained little black oblong box, with 3/8" BSP male thread connectors on either side, that runs on anything from 5V to 12V. It has no moving parts, and emits pulses corresponding to flow rate. You could hook it up to a fan header if you wanted.

Of course, the £30,-- Swissflow SF800 is smaller mechanical flowmeter, which does exactly the same thing and has a very low friction impeller, causing no significant wear.

[SlaterSpeed]

Where can i get hold of a SF800 in the uk nexxo?