DIGITEN G1-1/2" 1.5" Water Flow Hall Sensor Switch Meter Flowmeter Control 10-150L/min

Works great, Thread is straight rather than tapered so I had to use some sealant when connecting to a PVC threaded connection.

It arrived without frequency/flow graph or formula. I am using Arduino to measure the flow! So far, i do not know the exact flow to recommend it or not. I hope i can find such formula while searching the net

Bought this to measure the flow rate from my 10GPM submersible pump which lets me calculate how many gallons I have in reserve in my 350' well. I first bought the 1" model, but it is different design and is very constricted. This one has negligible pressure drop even at high flow rates. I'm running it at 5V and making pulse decisions at 1V. The label indicates the pulse train frequency is 0.5 Hz * flow rate in liters/minute which matches what I get measuring the water quantity. The thread isn't an exact NPT, but threads and seals fine using Sch 40 PVC fittings and liquid thread dope with Teflon. I measure the pulse interval to 100uS resolution to get flow rate and count pulses to measure water quantity. The results look perfect using a $10 Cypress PSoC CY8CKIT-059. Try it - its great!

Leaks out of both threaded ends. Something is bad with manufacturing. I've put in hundreds of threaded fittings with tape & pipe dope, I've never seen a leak like this. Out of the entire install, this is the only thing that leaks, which is going to be about 4 hours and 5 more fittings to replace. The raw material cost alone that I lost are more than the $20 I spent on this piece of junk I'm also skeptical about the "waterproof" status, as the wires go in to an unsealed hole, pretty sure that's a lie.

So far, so good! The product works as advertised and appears sturdy. I'm using this for an arduino-compatible project. My only know is that needed to use a decent amount of high-quality teflon tape to help with the seal.

Great price and super fast shipping. A++++++++ check out Livereefcam.com and Savethereefs.ca

It's a consumer grade flow meter. Not professional or industrial. It rattles a bit with flow. The readings fluctuate even though flow is constant. Accuracy is dependant on flow rate. In other words, if you tune it at 10GPM, it will not be accurate at 5GPM and will be way off at 1GPM. Other reviewers have suggested that there may be issues with longevity. All that said... For the price, it's probably a good product for me. Some tips... Use both Teflon tape and pipe dope. Don't use the white Teflon tape. It must be thicker. I tried first with a ton of white Teflon and it leaked. Only when I changed to a ton of yellow Teflon did I get a seal. And I do mean a ton. Like probably 15 times around and then lots of pipe dope. Flow is restricted on the smaller sizes of this meter. My plumbing is 3/4" but I adapted for this 1.5" flow sensor so as not to restrict flow. This works, but may contribute to the accuracy issues at low flow. Or that may be unrelated? No easy way to measure the K value? And it's not published? I assume that means that different applications will result in different K values?

Some reviewers mention that they could not get the threads on their flow meter to seal. It is true that the threads are not tapered, they are straight, similar to BSP. As you will note from the photo I have my meter installed into 1-1/2" copper and it does not leak. Using the knowledge from the aforementioned reviewer I armed myself with plenty of T tape as well as liquid teflon, sinched the joints up tight. I ended up with a small leak which was resolved by further tightening. The astute amongst us will appreciate that these items are coming from China where the standards are different than that of North American or European origin. The price point of this hardware reflects that. Works well. Would recommend