Re: Hafler DH-500 thermal circuit breaker needed

DH-stuff_at_ameritech.net.invalid
Date: 06/02/04 

Date: Wed, 02 Jun 2004 23:35:59 GMT

Tim,

If memory serves me correctly I believe the Hafler thermal switches tripped at
around 65C. The place below used to have a variety of thermal switches listed in
its catalog:

http://www.meci.com/

Hope this helps...........

Tim Schwartz wrote:

> Hello all,
>
> I'm trying to find a replacement thermal circuit breaker (Schematic
> location TB1 and TB2) for a Hafler DH-500 the part number is SF-024 in
> the earlier manual, or 332002 in the later manual. The part is no
> longer available from Hafler.
>
> The original is made by Elmwood Sensor, a division of Honeywell and is
> a 2450 series (the number is molded into the plastic on the top of the
> sensor). Other lettering around the side of the defective one is
> "87-232 L167 80/K", where 87-232 is likely the date code (232nd day of
> 1987), no idea about the L167, and 80/K the temperature where it trips.
>
> I've contacted Elmwood and the part is still available, with a $750
> minimum order, so that is not one of my choices. I believe the DH-120,
> DH-200, DH-220 and DH-500 all use the same part. Does anyone have a
> parts unit that might have a good thermal circuit breaker that they
> would be willing to part with? (Please note that on the DH-500 there is
> also a thermal sensor to turn on the fan, which is NOT a substitute.)
>
> Thanks for your time,
> Tim Schwartz
> Bristol Electronics

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