Electronic Flow Switch Needed

Go to www.kele.com and try this:

You most likely will have to fit a 2-inch adapter in your 3/4-inch line and program the PLC to "switch" upon flow detection, but they last "forever"!

Kele, Inc., 3300 Brother Boulevard, Bartlett, TN 38134, 901-382-4300

Brass & Stainless Steel Flow Sensors
Models 220B, 220SS
PDF's: Catalog Page | Models 220, 225, 226 Owner's Manual

• DESCRIPTION

The Models 220B and 220SS Flow Sensors are brass and stainless steel insertion type sensors for pipe sizes 2 1/2" to over 40".

• SPECIFICATIONS

Accuracy +1% of full scale
Linearity +0.7%
Repeatability +0.7%
Rangeability 60:1
Flow rate 0.5-30 fps
Max pressure 400 psig (2758 kPa) max @ 100°F (37.8°C)
Max temp 221°F (105°C)
Wetted materials (std. const.)
Impeller Glass-reinforced nylon
Bearing Pennlon (UHMWPE)
Shaft Tungsten Carbide
Housing Glass-reinforced PPS
O-rings Ethylene propylene (EPDM)
Sleeve
220B Admiralty brass UNS C44300
220SS 300 series stainless steel and hex adapter
Dimensions 7.125'' x 3'' dia. (18.1 x 7.6 cm)
Pipe connection 2'' MNPT
Weight 4.1 lb. (1.9Kg)
Warranty 1 year

thanks, but thinking there must be something better,, and less costly, over 600 dollars for the brass unit, and involve modification,, but will keep in mind,, the McDonnell SW was only 150 dollars,, but, I'm on the 3rd one now,, but it fits application, and is uses a micro SW,, all would be great,, and last a long time,, if they would just install a SS part,, have called and went round and round with them,, they say they will look into it,, but units still have a steel part that rusts quickly, and you cant get the part, just replace the unit,, nice huh,,

Try this from Automation Direct. About $150.

http://web4.automationdirect.com/static/press/prosense_sensors_npb.pdf

Didn't realize your budget was so tight!

thanks,, but this looks like it was a pressure sensor,, looking for a flow sensor,, or switch, need to know when there is water flow,, to trip program,, am currently using a SW, but its a paddle type,, so it restricts flow if it gets in the upper gpm, (for 3/4 size pipe,, thinking a flow sensor might work better,, if i can find one that senses a low flow, and can handle the higher flow,, so still looking for best type product.

thanks for the suggestion, that SW, looked like it would work for a different application,

have a great day,,

IF THEY ARE TOO CHEAP TO DO IT RIGHT FORGET IT AND MUDDLE ALONE WITH THEM.

HEY, YOU GOT A JOB RIGHT NOW MANY DON'T .

FIXING THAT WATER PIPE WOULD SOUND LIKE A GOOD JOB TO SOME RIGHT NOW.

you know its comments and remarks like that ,, that get readers turned off,, myself also, to cheap,, got a job,, hire a person, gee,,, smart a-- remarks?? you have to look down on others to make you feel better? what a shame,, i never said i was cheap,, i have several types to look at,, and ask to get opinions of others as to a new products,, or one that might work that someone has used,, and i get comment's like yours,, sad for you,, you think I'm cheap?? I don't have to spend 700 bucks for a sensor,, when there might be one just as good or work better without re-piping water supply,,thats hundreds of dollars cheaper,, whats wrong with that,, not many people have invested thousands of dollars to install and learn to program a plc, try to get latest products to automate house, nite lights, water heater, wood stove, window shades, sprinklers,indoor pool (can use yr round) on and on,,, so there,, and i doubt that very many service people would want to get involved in

i have looked at a flow meter, this also looks like i could get to work with the plc,, just need to change input to counter and adjust program,, have a company that has several of these type of products,, "gems sensors" going to call and talk to tech,, hopefully, and see what products they have that would work,,

thanks for the response and time from some,, and to make me feel better about my life from other/s

life is to short,, make the day a great one,,

I started to say change it over to a 4 in line and use a hih pressure steam valve but then I saw the SS was too expensive part and that made me reconsider.

Almost 9,000 people lost thier jobs last week in just New York. 4,500 in Ohio. 1780 here in Tennessee and so many more. Plus those that are already unemployed.

So I gave the best advise I could considering the economic times. I have seen maintance people laid off in hard times for not doing things on the cheap just to get by until better time roll back around. I have been yelled at for pulling equipmewnt off the line to repair small problems before they became major ones. Pulling it meant I would be spending money and they hated that at the time.

The day they closed an auto parts plant for 9 months because the guide pins kept breaking on the die's that made motor mounts for Chysler. They laid off 600 people on Dec 19th and that was all it took for me to learn and I was only the 2nd shift Supervisor at the time not the die makers who had to work with the cheap steel stock the compnay had bought for the tool and die makers to use.

Try http://www.gemssensors.com

They have many types to choose from.

I used a plastic model (don't recall the model #) at roughly the same flow rates you indicate to verify flow of KOH (2.0 normality) @ 70 degrees C. In 5 years, we had one failure due to debri in the sensor.

Good Luck!

thanks,,,!!

I just found that company,, going through grainger catalog ,,

going to look at there products!

plastic is not a problem,, is the cold water supply,, and is city water,, psi is around 80, shouldn't be a issue,,

thanks again,,!!

GEMS indeed mfr's a wide variety of flow sensors in the scope here. I've used them for years and are quite reliable. Good suggestion!

You might take a look at the GEMS product line. A 3/4" flow switch in PPL lists for 68 US$.

You can go here:

http://www.dwyer-inst.com/Products/Product.cfm?Group_ID=386&Product_ID=687&sPageName=Ordering

They are 38.00 each, plastic, and can sense as low as 1/2 gpm.

They come in 4 flavors. .5gpm turn on, 1.0 gpm turn on, 2.5 gpm and 5 gpm. All you have to know is when you want your switch to turn on.

I use the .5 gpm for a instant water heater and it works great!

If you are using this with a plc, it works great. I am using this to fire a relay for my system.

Make sure your do not overdraw the read switch. It can take 1.5a @ 24v or .5a @ 125v

Good Luck!

excellent,!! thanks you all for the notes,,, still looking to get in touch with gems,, where out for lunch,,

do you know if there is a flow restriction on these models? didn't see any specs for the units,

the draw is only to the input of plc,, so is not a issue,, just a sense,,

using the sensor for the same type of control to water heater, when in use it turns on heater to a different set point,, (try to help keep up with demand ) then kicks back to a lower setpoint when in standby mode,, so to speak,,

will look at them more also,, thanks for suggestions all !!

Maybe you try installing a pressure switch . You will get this with a differential setting 2-5 psi.

Below set pressure(minus differential) it will switch off.

WHATS NEWS.

What did you find out about the Gems product? What did you end up going with. I am in search of the very same thing you are (were). I was searching Google for it when I ran across this thread. I had already viewed Gems products and really like what they have to offer. The 90 degree plastic threaded piece looks like it might be the best for my application. The one by dwyer looks good, too. Let me know what you found -I'd appreciate it. Thanks.