REFLECTOR: sump tank.

[Dave Philipsen]

If you use the GEMS prism sensor, you will realize that it can only sink 
around 20ma or less.  That is enough to drive an LED but not an 
incandescent bulb or an annunciator.  If anyone is interested, I have a 
small circuit board (approx 1" x 3") that uses pluggable terminal blocks 
for all of the connections and uses a low-current relay which provides 
either a NO or NC dry contact that will easily drive an amp.  I've 
already used it with the GEMS sensor in my plane and it works well.  I 
design circuit boards for a living and I just tacked this thing onto 
another project.  I have a number of the boards that could be made 
available assembled or unassembled for a very reasonable price.  Will 
try to post a picture in a few days.  Contact me if you're interested.

Rene Dugas wrote:
> I'm using the optical prism sensor from GEM and no more flickering low
> fuel LED.  It must have a power lead and has three wires.
> Rene'
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Alex
> Sent: Sunday, September 09, 2007 10:53 PM
> To: 'Velocity Aircraft Owners and Builders list'
> Subject: Re: REFLECTOR: sump tank.
>
> My gems sensor has 1/4"npt thread- put a long plate in the side of the
> tank
> with 2 hard points one is about 1.5" down from the top, the other
> (plugged)
> is about 3" just in case I get some foaming, I can move the sensor
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of gattenby at tulsaconnect.com
> Sent: Sunday, September 09, 2007 10:25 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: REFLECTOR: sump tank.
>
>
> As I drill and tap hardpoints...
>
> I'd like to put one of those solid state "led" type
> sensors in the sump tank.  I know that we talked about 
> them
> on the reflector years ago... but I can't find where I 
> saved that info.
>
> What diameter hole do I want,
> How far down from the top is purdent.
> (too low and it cuts in to the Oh S--- reserve)
> (too high and it will false alarm when the fuel return 
> gets bubbly)
>
> Noel
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>   

-- 
Dave Philipsen
Velocity STD-FG
N83DP