neck tube temperature sensor

[Geoff Evans]

On Sun, 22 Sep 1996, roger smith x294 wrote:

> The epoxy was thermally conductive, electrically insulative and vacuum
> safe.
>
>  Sorry - I am in Tucson at present and don't have the epoxy
> at hand to check what it is.  It's blue!!

We were informed of this thermal-conductive-electrical-insulating epoxy by
Alistair Walker and Bill Ditsler. It is TRA-BOND 2151 and is obtainable
from :- 

TRA-CON INC.
55 North Street
Medford
Massachusetts
02155

Phone No.  (617) 391-5550
FAX Number (617) 391-7380

We use a similar temperature sensing system with 1N4148 diodes calibrated 
the same way. We glue the diodes into copper blocks using TRA-BOND 2151
These blocks are then screwed to the surfaces whose temperature we want to 
measure.

Willie Koorts( wpk at saao.ac.za )
Geoff Evans  ( gpe at saao.ac.za )
South African Astronomical Observatory
P.O. Box 9 , Observatory , 7935 , South Africa