I just checked the heater in my sons aquarium and it only goes to 34 degrees C. What about those jug elements used for camping? I think they are 12v though so you are going to have a fairly hefty current draw, but, considering that you will be ramping the temp up slowly....possibly not? Cheers, JJ -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jim Korman Sent: Tuesday, 17 February 2004 2:06 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE:] Temp test tank Denny Esterline wrote: > I don't think an aquarium heater will get to 50C. Keep in mind these are > built for keeping tropical fish alive. Most of those wouldn't be too happy > at 50C. For liability reasons I'd expect them to have overtemp cutoff > switches, but I'm only guessing. > > Basically, you're looking at a resistive electric heater, whether you use > soldering irons, beverage heaters, waterheater elements, heat lamps, power > resistors, industrial Cal-Rod, or something else, the control options are > basically the same: Relay (solid state or mechanical), Triac (AC), or power > transistors (DC). > A 100 watt heater in a 20 gal tank could get close. I had one wide open on a new tank (No fish!) and it ran the tank up to 110F. With some foam insulation around the tank 122F should be doable. Don't think that there would be any control that high though! Jim -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads