DIGITENWater Liquid Flow Rate Volume Digital Display Flowmeter Quantitative Controller Counter Liter Gallon

I've adapted this unit paired with a Gredia GR-201 1/2" flow sensor to monitor flow rate thru a UV sterilizer. The sterilizer I have requires a flow at 37 GPH optimum and 60 GPH max to be effective eradicating protozoa.Out of the box the pairing of the meter and sensor was way off reporting 16 GPH while a had a gate valve nearly closed.So to calibrate it, the meter has a K-factor value that has to be adjusted to the sensor you pair it with. The default was a K-factor value of 1.98.I did a Google Bard search for what the sensors K-factor should be... 11.45. I set the meters K-factor to that. It was much closer but not accurate.I adjusted my valve until the meter was reading 1 GPH of flow. I set up a bucket to divert the water exiting the system into so I could measure the amount dispensed in a minute. I recorded .453 gal. with the K- 11.45.Now a little math, a divide the current K- (11.45) by the flow it produced (0.453) while the valve restricted flow with the meter reading 1 GPM.The resulting new K-factor of 25.27 work precisely. Well as precise as using a large measuring cup to measure the amount of water dispensed.I re-ran the test, I got 1 gallon at the 1 minute mark, 3 gal at 3 minutes.The one annoying thing about the meter is the backlit display goes dark after 15 seconds. Annoying during the calibration when your hands are busy turning on/off a pump and a timer. But in actual use I'll only be using this to set the gate valve position and the backlighting won't so much be an issue.I hope this helps those trying to get a more accurate reading.

after setting the K factor ( constant needed for the sensor) and verifying the proper volume reading this meter works perfectly. I use it on my radiant concrete floor "electric boiler" to check and set flow in each circuit. Even though I have flow valves, checking flow with this type meter is much more accurate and quicker. My resulting floor temperatures are identical and the flow matches the engineering calculations. I didn't realize it comes with a flow sensor (lets the boiler know there is water moving in the system and also a temperature sensor. Very good and complete product that works!

I've spent the past few months refining my assembly of a whole house well water filtration system & reverse osmosis drinking water plus ice makers on 2 refrigerators, a sink side spigot & rain barrel top off water feed for our 600 gallon pond.With this flowmeter controller I can measure the feed water side of the RO/DI accurately, used in concert with the DIGITEN 1/4" Quick Connect Hall Effect Sensor Water Flow Sensor Food-Grade Flowmeter Water Flow Counter Meter 0.3-10L/min. to make it easier to determine membrane & pre/post filtration stages effective remaining life.Chose this over a kit as I've no need for solenoid control of the input water, the controller & sensor separately to saved a few bucks.Set up of the controller was fairly straight forward, set up for total usage, alarm function on a count, & visual flow indicator.Take note, the sensor is miswired when ordered separately from the controller.It's an easy enough fix as the jacks are accessable in the plug assembly & can be pressed out to swap positions to work with the controller's harness connector.In this case as noted by other reviewers the black & yellow leads need to swap positions to connect to the proper pins in the not quite correct mating connector.They can fit together but it's not the normal connector as appears to be supplied in the controller kit using the same sensor.Also, the temp probe they provide, is an MALE M8 BSP straight thread, so you'll need an adapter from that to NPT or press on to use it inline. I found one here https://www.amazon.com/gp/aw/d/B07SRVYQBZ.With the sensors installed it seems sensitive enough once the controller is properly calibrated to the right K value for your pressure & flow.Of course it would be great if it had flow sensor granular enough to track product water production.Calibration is pretty straight forward, set a K, decant some water, adjust until the meter display agrees with the decanted volume of water...in my case a K value of 150 was close enough.So now I can track when to swap out filters at 850 gallons & the membrane at 44000, as long as it stays in calibration & the flow meter doesn't fail.Build is decent, display is functional & pretty comprehensive. The case has a hang eyelet, which happily fit over the screw head I used.My opinion so far, is it's a good buy.I'll update in the future if anything changes.

Item appears manufactured quite well. Arrived on time. Will but same again if needed. very impressed with the menu options, instructions and ease of install. reminder to always switch to STOP before changing/resetting options. wish it had more than one input channel. comes WITH the temp sensor. there are no standard fitting at hardware store for this. i took a PVC end cap and tapped thread into it, wrapped the temp sensor with thread tape and screwed it in on top of an inline t-fitting. thread was 8 x 1.25 if i recall correctly

If mounted outside would strongly recommend a waterproof box like the one belowhttps://www.amazon.com/dp/B08B5QCVYZ?ref=ppx_yo2ov_dt_b_product_details&th=1The only thing this device is missing to be PERFECT would be wireless communication and some kind of app to monitor remotely and record usage history.

Mine was missing the solenoid valve and flow sensor?