I need a the smallest DC pressure switch that I can find that will DISCONNECT the circut when pressure is applied. I also need it to be very sensitive. any information would help. Thanks
2007-06-13 08:05:40 · 4 answers · asked by jaybwise 1 in Science & Mathematics ➔ Engineering
How much pressure (low) are you talking about, and is it air pressure? or water pressure?
For very low air pressure, a condenser microphone element is about as sensitive as you can get. It will produce voltage in the micro-bar regime. All you have to do is amplify it and put a comparator on the output of the amplifier to trigger your disconnect circuit.
Other than that, here are some commercial products:
http://www.omega.com/toc_asp/sectionSC.asp?section=H&book=pressure
.
2007-06-13 10:10:21 · answer #1 · answered by tlbs101 7 · 0⤊ 0⤋
A modern washing machine has a water level pressure switch that is VERY sensitive as it reacts to the pressure exerted by the height of water in the drum, (which is a very low pressure).
Go to any washing machine repair shop and ask about such a switch and explain why you want it. They should be able to supply you with one.
Another such switch is a 'Micro-switch'.
2007-06-13 16:44:17 · answer #2 · answered by Norrie 7 · 0⤊ 0⤋
Yes, There are such switches and they are called pressure switches and they are made in various sensitivities.
See: http://www.ashcroft.com/pressure_switch.html
2007-06-13 16:22:01 · answer #3 · answered by gatorbait 7 · 0⤊ 0⤋
What you probably want is a proximity switch or maybe a something more sensitive. Try this page:
http://www.amdi.net/sensors.htm
they've got a piezo switch that might do what you want
2007-06-13 15:21:24 · answer #4 · answered by johnnyshuteye 2 · 0⤊ 0⤋