G1/2" Liquid Display Water Flow Quantitative Controller Meter+Solenoid Valve
For DFC15 Controller:
Controller Power Requirement: 12VDC
Power Adapter: Input: 100-240VAC; Output: 12VDC, max 2A
Adapter lead length: 1m
Measuring Accuracy: ±1%
Output for Solenoid valve: 12VDC, max 5A
Temperature Sensor: 0-125℃/32-257℉, NTC3950, Accuracy: ±1℃/±1℉ thread: M8
Max Total Volume : 999999 G/L
Quantitative Range: 0-9999.99 G/L
Flow Rate Range: 0-9999.99/LPM(GPM)
Cable Length : 1m
Operation Environment: Temperature: 0-50℃/32-122℉; Relative Humidity: <85%
For G1/2" Flow Sensor:
Allow compression:Water pressure 1.75 Mpa below
Error: ± 2%
For G1/2" Solenoid Valve:
Operation mode:N/C,normally closed.
How to work:
1. Set K value, quantitative value, max alarm value, properly install the flow sensor and solenoid valve.
2. Press the RUN/STOP button, the controller works, total will continuously display the current flow volume, and current flow rate, and the faucet will start animated display.
3. When the flow reaches the quantitative setting value, the controller turn off the solenoid valve automatically, and the total value stop, faucet animation will be stopped dropping, flow rate back to zero.
4. Pressthe RUN/STOP buton again and the controller will repeat the same job.
1, This controller work with the solenoid valve up to 5A, but this kit come with 2A power adapter. If drive a large solenoid valve, please use suitable power adapter.
2, Ensure the solenoid valve and flow sensor direction is the same with water flow.
3, Avoid the water into the controller.
1 x DFC15 controller
1 x G1/2" flow sensor
1 x G1/2" solenoid valve
1 x Power adapter
1 x Temperature sensor
1 x Manual
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Once calibrated (using a weight measuring scale and adjusting the "K" Factor in settings) this meter appears to be rock solid. It come default "K" at 7.50. I have adjusted this to be more precise with a value of 6.92. Be interesting to know if others had to make the same adjustment Pay close attention to the connection harness as the strain relief on the cable is marginal at best. Mine was missing a screw and the other unit (I have 2 ) the wire jacket was not even clamped.
A cheap flow meter that can be connected to a solar panel and a battery leave it there working remotely for days. I used for a infiltration test in the middle of nowhere in central California. Keep it working in the field for a week in a very harsh environment and work great. I totally recommend this equipment.
I've been using this meter for several months now in my gourmet mushroom operation and absolutely love it! One thing to keep in mind. The valve is closed until the solenoid receives the voltage to open. This is critical to understand if you're going to be keeping the valve open for extended periods. The solenoid heats up quite a bit when it's open for an hour or so. I can't imagine what it would do if it was left on all day. This technically is not a problem for me because it's only open a few seconds but I wanted to make sure others are aware if that's what they are wanting to use it for.
I was going to build my own controller but then I found this product which did everything I had designed mine to do and more. It is well designed and has nice features. Instructions are good except for the installation of the solenoid valve and flow sensor, which have no info. They need a bunch of adapters to interconnect to more common 1/4" or 1/2" water lines and they are NOT easy to find. I decided to replace them with 1/4" quick connect parts because they mated better with the water filter plumbing. It required replacing the electrical connectors to the controller but that was much easier than dealing with plumbing adapters and leaks. Another issue is the calibration of the K factor for the sensor. The manual says to consult the manufacturer of the sensor but they don't provide data even though they include the sensor. It takes trial and error to get the right K factor for the flow sensor but once it's set it stays pretty accurate. It also includes a temperature sensor but the sensor wire is very short and the manual does not explain how to incorporate it into the plumbing. I had to modify it so it could be dropped into a filling bucket.
I've been wanting a water flow meter with solenoid for a while for my beer brewing, but I couldn't find something within my price range with good reviews and in gallons until this unit became available (I've been looking for years).
This was easy enough to put together and setup. I had to use a number of 1/2" NPT couplers since all the fittings here are male (it would've been more convenient if the solenoid was female NPT on both sides for me). It took me about half an hour to calibrate the k constant for my flow rate and fittings. I was able to get it to within 1.5 ounces by weight for a gallon - I calibrated with a gallon milk jug first to get it close, and then I fine tuned it on a scale knowing the density of a gallon of water.
The solenoid is honestly of dubious long term quality, but I plan on buying a higher quality one to keep on hand, and I hope it does last a long time.
One nit pick for my system at least, is that the temperature probe uses an M8 threading, and given that the fittings are NPT, it doesn't quite make sense to me. I decided to use a 1/2" NPT plug, drill out the end, and then I bought M8 taps and tapped it myself to make a bushing so that I could measure the temperature. It did end up working well, but it would've been nicer to have a 1/4" NPT or 1/8" NPT for this.
I've only used it for brewing twice, but it worked exactly as expected, and I actuated the solenoid numerous times while calibrating as well.
It would've been nicer if the power supply were rated for greater than 2A since the controller can ouput up to 5A to a solenoid, but that isn't that big of a deal, I can either get a higher rated power supply or go with a separate SSR.