Long shot, but you never know.... our machines use a water/glycol mix coolant, but the normal flowrate is 1l/min. We currently use an electronic (electrostatic) flow indicator with a range of 0.5-20 l/min with a 0-5V analogue output (we seem just to monitor that, and if it gets too low, set an alarm) and a +/-2% FSD accuracy!. Unsurprisingly the results are often crap, and we end up throwing out 50% of what we buy, at £600 a pop. Now, as we only build 3-4 of these machines a year, and they sell for £350k, some take the view that spending £6k to get 4 good FI's is sensible ecomonics. It would be nice, though, to find a more suitable item - has anyone played around with very low flow rate FI's and know of one a less that £1k that'll do the job?
ETA: Apparently the switch has an RS232 output that we pick up a low flow alarm condition from, 0-5V isn't used.
