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Old 03-18-2013, 08:49 AM   #7 (permalink)
dom444
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Join Date: Mar 2013
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here is some info I found on one of them:

For the sense of the water flow rate on the following equipments: Thermostatic water heater, water purifier, water dispenser, smart card equipment, coffee machine etc.

frequency =26*Q(Q: L/min) , Inner diameter :3.0mm,Flow rang:0.5-5L/min

Maximum current:15mA

further searching says they are made from Polyoxymethylene or POM material
which according to Wikipedia is also used for fuel senders.

Last edited by dom444; 03-18-2013 at 09:02 AM..
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