Pressure/Flow sensor location

[jeckardt]

Where in the water flow path should the pressure/flow sensor sold here at Lightobject.com be installed? Before or after the tube?

I'm thinking after the tube but before the cooling radiator.

Thanks,
Joe

[Tech_Marco]

Joe:

It really doesn't matter as the current is in "series" path. So, if water stop anywhere, the sensor would become 'Open' circuit and disable the power supply. Just need to make sure the sensor is in level position to avoid false signal.


Marco

[daniel.macke]

Hello,
I bought a EWP-SNR104 Water-flow On/Off Sensor (G1/2) at lighobject and use it in my laser tube cooling system.
Before installing this device, I tested it first in horizontal position and the result was not good : when I switched on the pump, the NO contact was closing but, when turning the pump off, the contact stayed closed!
Then I tested this thing in vertical position (input at the bottom, output at the top) and it is working perfectly, with very short ON/OFF delays. Now it has been working like this for a few months.
So I think gravity is important to help the sensing part inside return to its opened position...
Regards
Daniel

[Tech_Marco]

Thank you Daniel for the correction. I will double check it and put a note on the description.

Marco

[jeckardt]

Does it seem to make any difference if the sensor is being fed off the "side leg" of the T vs the inline? For fluids, a T (or L) adds resistance to the system, so one could argue that it's best to have the in/out main feed across the straight both (to maximize flow through the tube) and have the sensor on the side leg. But that's all theoretical and maybe only applies to high-pressure systems, which this is not. So, in practice, does it make any difference?

Joe

[Tech_Marco]

It is just matter of preference only. Some use straight through while some use "T" like this one: http://www.lightobject.com/Water-flow-p ... -P815.aspx


Marco