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Product Description Specification
External Connect Thread Diameter: G1/2 inch (BSP)
Withstand Range: Water pressure 1.75 Mpa below
Pulse Frequency: F=7.5 * Q (L / Min)
Working Voltage Range: DC 3-24 V
Maximum Current: 15 mA(DC 5V)
Load Capacity: ≤10 mA(DC 5V)
Flow Range: 1-30L/min
Insulation Resistance: >100M OHM
Storage Temperature: -25℃～+80℃
Storage Humidity: 25%～95%RH
Operating Humidity: 35%～90%RH
Operating Temp: ≤80℃
Cable Length:15cm
Tolerance: ±2%
Output Waveform: Square Wave,output pulse signal
Three wire connection guide:
Red for positive, Black for negative, Yellow for pulse signal.
Outlet with 2m/6ft NTC Temp Sensor
Verna
Reviewed in Canada on December 21, 2024
I used these meters in my hydroponic green house for one season and am very impressed
Enrique Torres
Reviewed in the United States on January 9, 2024
It is not to much reliable
Customer
Reviewed in Canada on February 7, 2023
Searched for a long time trying to find a replacement sensor for my Coleman hot water on demand Although the cord wasn’t long enough I just spliced and soldered the old wire on and it works great
jim R.
Reviewed in Canada on March 5, 2022
The website was not helpfulI did find out that longer cable lengths were available, but no info on how to specify
Stephen
Reviewed in the United States on July 22, 2020
Works very well and accurate. Added 0.1 cap on input for noise.
PHM
Reviewed in Canada on March 14, 2020
So far it is good.
H
Reviewed in the United States on October 8, 2020
Got it to work. After testing and calibrating I found that using 6.5 instead of 7.5 as the multiplier gave much more precise readings. Anyone agree?
Rand A. Beveridge
Reviewed in the United States on May 25, 2019
I have this hooked to an esp32 (flashed with esphome) that talks to a RPi running Home Assistant and it's measuring the flow of water going to our garden. Works great.
RW M
Reviewed in the United States on July 18, 2018
Seems to report relatively accurate flow.
Trish
Reviewed in the United States on November 30, 2018
Love this ... unlike magnetic reed switch sensors this wont stall in a polarized location giving a false impression of flowing. it is also very sensitive to low flows which a reed switch cant do unless there is a threshold flow
totally
Reviewed in Canada on December 26, 2017
The product I received was actually the FL-608 and not the FL-408 as specified in the product information here. It has slightly different stats but so far I am able to read the pulses in my test setup. I have not hooked it up to actual liquid flow yet to calibrate it but I believe it will work well for my situation.
alexw
Reviewed in the United States on November 5, 2017
Only 2% accurate, but the calibration factor specified as 7.5hz/(l/min)=450pulses/liter seems to be quite off as well. After averaging a couple of tests, I've calculated it to be more like 13.25hz/(l/min) = 796 pulses/liter.
DCFusor
Reviewed in the United States on November 19, 2017
Been using these for a long time as part of an automated rain collection and use system. I use these to know when the flow stops, and monitor transfers between tanks. They don't like to eat twigs but hey, what would you expect? They won't always start on very low flows, but again, they are a very good trade-off for what they do at the price. The one I took apart (to remove a twig and fix some damage caused by wearing against said twig) was very well built and without having eaten something I shouldn't have let in there looks like it would have lasted more or less forever, and never leaked.
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