REFLECTOR: Low Fuel Warning Sensor False Reading: SOLVED?

[Brian Michalk]

I originally tapped the sump for a mechanical sensor.  When I went to 
this sensor, I inserted I believe a brass bushing with NPT tapered 
threads.  The sensor is some sort of plastic, with parallel threads, so 
I put teflon on, and secured it as if it were also tapered.  It doesn't 
leak.

On 4/29/2014 8:06 AM, Tom Falls wrote:
> Thanks Brian.  So how does this sensor mount to the sump tank?  Is it 3/8" NPT or 3/8" straight thread? If straight thread, how do you seal it to prevent leaks?
>
> Thanks,
>
> Tom
>
>> On Apr 28, 2014, at 10:35 PM, Brian Michalk <michalk at awpi.com> wrote:
>>
>> I didn't realize the URL didn't point to the sensor.
>>
>> http://www.mcmaster.com/#4949k33/=rqo9c8
>>
>> Mine is the 4949K33.
>>
>>> On 04/28/2014 06:35 PM, Tom wrote:
>>> What’s the part number for this sensor? This link took me to page with multiple choices of sensor types.
>>>
>>> Thanks,
>>> Tom
>>>
>>>
>>>> On Apr 28, 2014, at 10:55 AM, Brian Michalk <michalk at awpi.com> wrote:
>>>>
>>>> An update to those of you using an optical fuel level sensor.
>>>>
>>>> I had installed the Carlo Gavazzi sensor from McMaster Carr ( http://www.mcmaster.com/#liquid-level-sensors/=rqf988 ) because it's a solid state optical sensor that should never wear out.
>>>>
>>>> I have had problems with it falsely indicating a low fuel situation in the sump.  Finally yesterday while flying I deduced that whenever I flew west towards the sun, the low fuel light would illuminate, and when I flew east away from the sun, the light would extinguish.
>>>>
>>>> The manual does say the device doesn't work in sunlight, but I never considered bright light to be the culprit.  I am going to fly with the sump covered with material to confirm my suspicions.  If confirmed, I will be painting the sump tank so that sunlight will not penetrate the sump.
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>>>
>>>
>>>
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