brass water flow meter 833

by thermodynamics on Wed Jan 30, 2013 12:45 pm

I have recently purchased this flow meter. The spec sheet says 1/2" NPT. However, the male end of the flow meter will not turn into a 1/2" female adapter. I have tried it with multiple adapters. It appears that the thread is cylindrical. Is there a special threaded adapter that is used with this flow meter. Can someone shed some light on this ?

Thank you.
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Re: brass water flow meter 833

by adafruit on Wed Jan 30, 2013 5:28 pm

does it -kind- of fit? this is the first time we've heard it doesnt fit NPT and we've sold a bunch :)
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Re: brass water flow meter 833

by thermodynamics on Thu Jan 31, 2013 12:19 pm

The male end of the flow meter threads in "one" turn into a female adapter. So I guess it kinda fits. However, I am hesitant to have to use a wrench to turn it in more. I have tried the flow meter with a non tapered cylindrical 1/2" thread, and it threads in with out any issues. As well, the male end of the flow meter has a flat face which looks like it was meant to mate with a gasket of some sort to make a seal.
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Re: brass water flow meter 833

by adafruit_support_bill on Fri Feb 01, 2013 7:24 am

Hmmm. Sounds like an NPSC thread instead of NPT. I'll look into that.
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Re: brass water flow meter 833

by thermodynamics on Wed Feb 06, 2013 8:11 am

The threads on the flow meters that I received are 1/2" BSPP not NPT. Are there special fittings that can be purchased for this flow meter to adapt to NPT. Do you have this flow meter with NPT threads?
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Re: brass water flow meter 833

by adafruit_support_bill on Wed Feb 06, 2013 8:38 am

Adapters are available from places like Grainger, Cole Parmer, Parker etc. I'm still waiting for word on the threading for the rest of our stock.
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Re: brass water flow meter 833

by adafruit on Tue Feb 12, 2013 6:32 pm

Sorry for the delayed response, wanted to figure out exactly whats up, the brass flow meter we have matches up perfectly with mcmaster carr # 5116K88 so which is why we thought its NPT when in fact its NPS (not tapered)!

Not sure about adapters, will update the text description of the item!
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Re: brass water flow meter 833

by curdnerd on Mon Sep 02, 2013 9:54 am

Hi, I just ordered one of these sensors, and I'm curious if it is indeed NPT or not. Also, does it care which direction the flow is? Thanks in advance!
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Re: brass water flow meter 833

by adafruit_support_bill on Mon Sep 02, 2013 10:42 am

As the previous post states, these are NPS, not NPT. And yes, they are directional.

http://www.adafruit.com/products/833#Technical_Details
Mechanical:
1/2" nominal pipe connections, non-tapered, 0.78" outer diameter, 1/2" of thread
Size: 2.65" x 1.0" x 1.4"
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