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Author Topic: Electronic Flowmeter  (Read 21439 times)
cornishben
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« Reply #15 on: December 29, 2008, 12:04:51 PM »

Wookey et all - lots of good information here, any further feedback on your flow meter(s) ?

Would like to hook one up to my Arduino for experimentation so looking to get one

Ideally I'd like to use one of the electromagnetic/ultrasonic ones so it's non-invasive (ie clamps around the pipe, not needing to be plumbed in), but I guess these are too expensive for our application?  have you looked into these at all wookey?
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wookey
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« Reply #16 on: December 29, 2008, 11:54:00 PM »

The swissflow one I'm using is working fine and has survived one stagnation episode as well as a lot of filling/draining and pipe-tightening, so it does appear to be sufficiently robust, despite looking a bit small and plastic. I'm (still) not graphing its output so I'm not sure how accurate it is in practice. I'd use one again if doing another install.

Kristen is about to fit some larger flow-meters, which may produce some more feedback. A danfoss magic external sensor was mentioned by his installer, but at GBP 300-odd is too expensive for most of us.
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Wookey
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« Reply #17 on: February 06, 2016, 04:50:20 PM »

Oh look you search on the net for info and find your own posts :-)

So, an update:
The swissflow device stopped working after a year or so. I presume it eventually overheated. Whilst I am rearranging the plumbing, I am about to put the caleffi 316 device in in its place as I have one kicking about. And in the intervening 7 years I've found some docs. They are still widely available for ~25 euros.

http://eliuz.altervista.org/immagini/FLUSSO_316.jpg (and various images on ebay.it) shows the pinout: power, gnd, data, with standard cheapo molex 3-pin connector. The implied order on the datasheet is different. It shows 3 wires comes out (rather than a connector) as Red (power), white (data), Green (Gnd), but I think that's just because it makes the schematic looks nice: http://www.arbo.it/New/resources/SchedeTecniche/316405.pdf rather than implying physical order.

Testing it with a scope, you do indeed get a nice square wave from GND to +VE with any input voltage from 2.4V to 12V. (The datasheet says 3.8V to 24V). So now I know it works I'll do some plumbing...

This one will probably melt too as the datasheet says <60C fluid. But I may get some interesting data first :-)
« Last Edit: February 06, 2016, 04:52:55 PM by wookey » Logged

Wookey
atomozero
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« Reply #18 on: July 11, 2016, 07:26:47 PM »

is like this
http://www.quicklion.eu/en/flow-switches/43-ferroli-39804220-rotative-flowswitch.html
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wookey
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« Reply #19 on: April 12, 2017, 12:40:45 AM »

Not sure. That domain seems to be dead now, so your link is not working for me.
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Wookey
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