Thanks Ron/Kenneth for the correction. Inches of mercury for manifold pressure is correct. I was not thinking clearly. But that is not unusual.
Mark Jones Mueller Sales Corporation Ph: 262-781-5310 Fax:262-781-4130 E-mail: mjo...@muellersales.com Web: www.muellersales.com -----Original Message----- From: Ron Freiberger [mailto:rfreiber...@swfla.rr.com] Sent: Monday, February 09, 2004 9:51 AM To: KRnet Subject: RE: KR>Vacuum gauge vs manifold pressure gauge Manifold "pressure" is conventionally measured is Inches of mercury, 0 to 30. If it's AIRCRAFT, it's more expensive. And 2.25 inch diameter, and nice looking. If you go to PepBoys, and buy one for your CAR, it'll be cheaper. Ron Freiberger mailto: rfreiber...@swfla.rr.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Mark Jones Sent: Monday, February 09, 2004 10:10 AM To: KR Net Subject: Re: KR>Vacuum gauge vs manifold pressure gauge >OK folks this might be the dummest question but... >Is a vacuum gauge going from 30" of vacuum down to 0" the same as a >manifold pressure gauge going from 0" of pressure up to 30". If so, and >it's just a dial face change, why are the latter so much more expensive. >See, for example, in the Aircraft Spruce catalog (mine is old at >1998-1999): No, the two gauges are not the same. A vacuum gauge is measured in inches of mercury and uses an internal bourdon tube which flexes and contracts with pressure changes and is what a standard pressure gauge uses to measure pressure. A manifold pressure gauge measures inches of water which is a very low pressure and incorporates a diaphragm to make the measurement and is calibrated accordingly. Now, if you really want to save money, my company sells every type of pressure gauge you can think of and we have 63mm (2 1/2") 0-30" hg gauges for $25 each. These are all stainless steel case, panel mount held in place by a U-clamp. Mark Jones (N886MJ Wales, WI _______________________________________ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html _______________________________________ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
