Hello mumin,
If you are not too afraid of opening the Aquarium heaters, you can
modify them to do higher temperatures.
I just modified one to go till 45 degrees C, but it during testing it
also did 50 degrees, and probably more.
I just bought the cheapest one in the shop, called AquaEL, in my case
100 W.
They work using a bi-metal element, which will bend more when heated,
and thus acting like a relay. Adjust the distance to the contact, and
it will switch on higher temperatures. They are just set on a fixed
range.
However, some will be easier to adjust / open up then others,
so there is no quarantee with all makes.
Best bet is with older rubber closed tops, which can be easier opened.
Gertjan
--- In
Homebrew_PCBs@yahoogroups.com, "mumin55555" <MUMIN55555@H...>
wrote:
> HALLO!
>
> im want to buy a water heater for the etching tank i am building.
> my problem is: no aquarioum heater thermostat goes more then 34
> degrees c, while i need about 60 i think- for ammounium
phersulphate.
> what can i do?
>
> thanks a lot
> mumin