X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 10 Jun 2007 13:38:12 -0400 Message-ID: X-Original-Return-Path: Received: from web82715.mail.mud.yahoo.com ([68.142.201.29] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with SMTP id 2094994 for lml@lancaironline.net; Sun, 10 Jun 2007 13:09:01 -0400 Received-SPF: none receiver=logan.com; client-ip=68.142.201.29; envelope-from=earleschroeder@yahoo.com Received: (qmail 21413 invoked by uid 60001); 10 Jun 2007 17:06:09 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=gcGHG+eH6b3rJoO1vSlVmJnkauqX1x38httbrpoPAr7bme251pvPy/2LOoP94H1dTGUoARDywero0F6W4A7W/wvwy+FiLvT+/a2oKfEexL4u2h2xNmzK+y0G0PDrOMSIj1OSgNiuLGfQwVLcGAnwyqqoxrHCSZ0C4LYCvXKud+Q=; X-YMail-OSG: DwvZA5cVM1m4bVUbpBT38uMJE02ZuBkjnC6AA6ikcgvDZmvDyqIsb.nleB8xanQmGA-- Received: from [75.16.239.157] by web82715.mail.mud.yahoo.com via HTTP; Sun, 10 Jun 2007 10:06:08 PDT X-Mailer: YahooMailRC/478 YahooMailWebService/0.7.41.14 X-Original-Date: Sun, 10 Jun 2007 10:06:08 -0700 (PDT) From: Earl Schroeder Subject: Re: [LML] Re: Unstable Fuel Quantity indication X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1970580766-1181495168=:17155" X-Original-Message-ID: <963613.17155.qm@web82715.mail.mud.yahoo.com> --0-1970580766-1181495168=:17155 Content-Type: text/plain; charset=ascii Bob, In my former life, I was a process control tech [Lexan process] and our cap probe systems used 4-20 ma output which was dropped across a 250 ohm resistor to give 1-5 VDC. I'd think 1-5 V would be a good place to start. Robert Shaw, Drexelbrook were a couple of manuf that we used. Earl ----- Original Message ---- From: bob mackey If there is enough demand, and a reasonably standard output format, I could make a circuit for measuring capacitance and reporting it to an MFD. With only a little more effort it could detect water or alcohol in the fuel and set an alarm. The size and weight would be negligible compared to the sensing tube. Who would know what output format would be appropriate? --0-1970580766-1181495168=:17155 Content-Type: text/html; charset=ascii
Bob,
In my former life, I was a process control tech [Lexan process] and our cap probe systems used 4-20 ma output which was dropped across a 250 ohm resistor to give 1-5 VDC.  I'd think 1-5 V would be a good place to start.  Robert Shaw, Drexelbrook were a couple of manuf that we used.  Earl

----- Original Message ----
From: bob mackey <n103md@yahoo.com>

If there is enough demand, and a reasonably standard output
format, I could make a circuit for measuring capacitance and
reporting it to an MFD. With only a little more effort it could
detect water or alcohol in the fuel and set an alarm. The size and
weight would be negligible compared to the sensing tube. Who would
know what output format would be appropriate?


--0-1970580766-1181495168=:17155--