REFLECTOR: [Fwd: [FlyRotary] UV-Tron Fire Detection System]

Scott Derrick scott at tnstaafl.net
Tue Aug 30 21:45:58 CDT 2005


I wonder how it would do if there was a lot of smoke?

Scott

Jim Sower wrote:

> Thought this might be of interest ...
>
> -------- Original Message --------
> Subject:     [FlyRotary] UV-Tron Fire Detection System
> Date:     Tue, 30 Aug 2005 08:04:25 -0500
> From:     Mark R Steitle <mark.steitle at austin.utexas.edu>
> Reply-To:     Rotary motors in aircraft <flyrotary at lancaironline.net>
> To:     Rotary motors in aircraft <flyrotary at lancaironline.net>
>
>
>
> Last week we were discussing various methods of dealing with fire 
> dangers in our aircraft. I decided to try out the Hamamatsu UV Tron 
> flame sensor, and promised to report my findings to the Fly Rotary group.
>
> I located a pre-assembled circuit board from Superdroid Robots, a 
> company that supplies a variety of parts for robots. They were the 
> only place I could find that carried the Hamamatsu C3704 flame 
> detector and driver card. So, I ordered both along with a relay board. 
> (Attached is a picture of the boards.) The UV Tron sensor is the clear 
> glass “bulb” in the foreground. The small board on the left is a 
> voltage converter, allowing it to be connected directly to 14v.
>
> I hooked it up to a 12v cordless drill battery and tested it using a 
> propane fire starter. It could easily “see” a flame from 6’ away 
> (maybe more, but I didn’t test it beyond 6’) and up to 90* right or 
> left. I didn’t test up/down, but the spec sheet indicates that it is 
> about the same in the vertical and horizontal planes. I could not get 
> it to false trip by using a fluorescent or a halogen light. There is 
> about a .5 second delay before it trips the relay. The tech rep at 
> Superdroid Robots indicated that the UV Tron sensor could be remotely 
> mounted up to 3’ away from the board. I plan on mounting it in a small 
> box on the firewall with the leads running though the firewall to the 
> circuit boards inside the cabin, wired to a big red flashing LED on 
> the panel. Everything in the picture (including s&h) ran $150. I look 
> at it as cheap insurance. Hopefully, I will never need it.
>
> Mark S.
>
>
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