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Originally Posted by starbuck3733t
Are their specs on it inner diameter or outer diameter?
And does it say 1.5L/minute or 1-5L/minute. B/c if its 1.5L/minute norminal rate, that's pretty damn low.
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I like your sig
Well remember I only bought it, I didn't design it
but I'm pretty sure it's 15mm OD, when i find the one i have I'll measure. It can't be 15mm ID because like I said in the linked article I tapped a thread in the body of the 15mm unit for a standard 1/2" barb, with 1/4bsp thread. There are two 15mm versions and my guess is it's just the "bobbin part", (the bit that moves up on flow to trigger the proximity switch), is just lighter on one type so it registers flow at a lower flow rate. The lpm rating is just a trigger point not maximum flow, if you are just using it to monitor pump death / flow loss then its fine.