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| Yup, some will just put a singleton isolated feed flow indicator right at the dosatron. Requires visual line of sight, but it's plenty fine.
I had two guys last year that plumbed one of our flowmeters (just as they needed really low flow rate), and hook it up to a board that powered a light when it was flowing. So at least for a visual, if you see the light on (or blinking or whatnot) you'd know product is flowing.
Keep in mind the dosatron is supplying flow via PWM, so it throws off some flowmeters due to the low flow rates and kind of 'pulse back' that can happen between pulses. | |
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