Looking for a 1-psi Hobbes switch

[Greg Hermann]

>In a message dated 5/8/99 5:54:18 PM Pacific Daylight Time,
>EdDSP at ix.netcom.com writes:
>
><< Here's what I'm doing. I'd like to mount a switch on an intake manifold
> that'll work once there is positive pressure (boost). Such a switch
> exist? A part # would be most appreciated too. >>
>
>The lowest psi activated switch I've ever seen was a 3psi unit...that goes
>for like 125 bucks! You can get an adjustable hobbs one (sold for use with
>nos systems) that activates at 5psi for like under 10 bucks. Then you can use
>a regulator or other restrictor inline and adjust it to show the switch the
>psi you need.
>
>Van

How about the switch normally used on oil pressure to actuate the oil
pressure idiot light--aren't they set at about 4 or 5 psi??

Greg