T
treez
Guest
Hello,
We are making automatic shower mixer units which mix hot & cold water to get the required temperature for a shower. We use stepper valves to adjust hot and cold flows.
These units are fitted up in people’s attics, so it gets freezing cold in winter. There is a possibility that the cold pipe water could freeze, and then only hot water would come out, and scald the customer severely. In order to mitigate this with as few as possible components, we wish to simply put a thermistor in the unit. If it is at zero degrees or less, then we will open only the cold valve at first. If there is no flow of water, then obviously we wouldn’t then allow the shower to continue.
The thing is we need to detect the flow of cold water, without putting a flow sensor in the pipe as it is too expensive….Is their a kind of hall type sensor which one can fit to the outside of the copper pipe and it will give an electrical output if there is water flow in the copper pipe?
We are making automatic shower mixer units which mix hot & cold water to get the required temperature for a shower. We use stepper valves to adjust hot and cold flows.
These units are fitted up in people’s attics, so it gets freezing cold in winter. There is a possibility that the cold pipe water could freeze, and then only hot water would come out, and scald the customer severely. In order to mitigate this with as few as possible components, we wish to simply put a thermistor in the unit. If it is at zero degrees or less, then we will open only the cold valve at first. If there is no flow of water, then obviously we wouldn’t then allow the shower to continue.
The thing is we need to detect the flow of cold water, without putting a flow sensor in the pipe as it is too expensive….Is their a kind of hall type sensor which one can fit to the outside of the copper pipe and it will give an electrical output if there is water flow in the copper pipe?