Temp Controller

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0><script type="text/javascript" src="http://hb.lycos.com/hb.js"></script> <script type="text/javascript" src="http://ratings.lycos.com/ratings/lycosRating.js.php"></script> <script type="text/javascript"><![CDATA[//><!]]></script> <script type="text/javascript" src="http://scripts.lycos.com/catman/init.js"></script> <script type="text/javascript" src="http://members.tripod.com/adm/ad/code-start.js"></script> <script type="text/javascript" src="http://members.tripod.com/adm/ad/code-middle.js"></script> <script type="text/javascript" src="http://members.tripod.com/adm/ad/code-end.js"></script> <noscript> <img src="http://members.tripod.com/adm/img/common/ot_noscript.gif?rand=851008" alt="" width="1" height="1" />  <iframe frameborder="0" marginwidth="0" marginheight="0" scrolling="no" width="728" height="90" src="http://ad.yieldmanager.com/st?ad_type=iframe&ad_size=728x90&section=209094"></iframe>  </noscript> <table cellpadding=0 cellspacing=0 border=0 height="100%"><tr> <td valign="top" width=18.75% BGCOLOR="#000000" TEXT="#F7F7FF" background="040a11c3.gif"> <bR> <bR> <div> <B><U><Main 100g tank></U></b></div> <div> <B>     </b><A HREF="id49.htm" TARGET="_top" TITLE="Setup"><U>Setup</U></A></div> <div> <B> Pictures</b></div> <div> <B>     </b><A HREF="id47.htm" TARGET="_top" TITLE="Couple of Pictures from Side A"><U>Side A</U></A></div> <div>      <A HREF="id43.htm" TARGET="_top" TITLE="Overall View of Side B"><U>Side B</U></A></div> <bR> <div> <B><U><Nano-reef tank></U></b></div> <div>      <FONT SIZE="3" COLOR="#FFFFCC" FACE="Arial" ><A HREF="id63.htm" TARGET="_top" TITLE="Nano Tank"><U>Setup</U></A></FONT></div> <bR> <div> <B><U><DIY></U></b></div> <div> <FONT SIZE="3" COLOR="#FFFFCC" FACE="Arial" >    </FONT> <A HREF="id67.htm" TARGET="_top" TITLE="Power Center"><U>Power Center</U></A></div> <div>      <A HREF="id71.htm" TARGET="_top" TITLE="Surge Box"><U>Surge Box</U></A></div> <div>      <A HREF="id73.htm" TARGET="_top" TITLE="Canopy"><U>Canopy</U></A></div> <div>      <A HREF="id75.htm" TARGET="_top" TITLE="Backup power"><U>Power backup</U></A></div> <div>      <A HREF="id77.htm" TARGET="_top" TITLE="Wavemaker"><U>Wavemaker</U></A></div> <div>      <A HREF="id78.htm" TARGET="_top" TITLE="Temp Controller"><U>Temp controller</U></A></div> <div>      <FONT SIZE="2" COLOR="#FFFFCC" FACE="Arial" ><A HREF="id81.htm" TARGET="_top" TITLE="Kalk Reactor"><U>Kalk Reactor</U></A></FONT></div> <div>      Water Topoff</div> <bR> <div> <A HREF="id60.htm" TARGET="_top" TITLE="Perisaltic pump"><U>Doser</U></A></div> <div> <A HREF="id53.htm" TARGET="_top" TITLE="Anthias"><U>Anthias</U></A></div> <bR> <div> <A HREF="id38.htm" TARGET="_top" TITLE="Page 1:"><U><B>Frags to trade</b></U></A></div> <bR> </td> <td valign="top" BGCOLOR="#000000" TEXT="#F7F7FF"> <div> <B>Temp Controller</b></div> <div> <IMG SRC="03ff4010.gif" border=0 width="500" height="1" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <FONT SIZE="5" COLOR="#FFFBF0" FACE="Arial" ><B>Reef Tank </b></FONT><FONT SIZE="1" COLOR="#FFCC99" FACE="Arial" >     </FONT>|   <A HREF="index.htm" TARGET="_top" TITLE="Reef Tank "><U><B>home</b></U></A></div> <div> <IMG SRC="03ff4010.gif" border=0 width="500" height="1" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <bR> <div> <U>Temp Controller</U> <FONT SIZE="1" COLOR="#FFFFCC" FACE="Arial" >(the following is a documentation of what I HAD done and NOT what will work; please read it as a reference and make sure you have some basic electrical knowledge before attempting projects dealing with electricity.  Don't blame me if you set anything on fire! :) )</FONT></div> <div>    </div> <div> (Made around summer 2000) Same with this....I'll have to take some photos.... I have two controllers.  One by Johnson Controls and the other made by Ranco.  Both are commercial type single-stage electronic temperature controller with a sensor.  The sensor or thermistor is heat-shrinked and epoxied on ends to seal out all moisture, since it sits in water to pick up the exact water temp and not air temp. It is not designed to be water-proof and can short out.  You just need to add an outlet box to the controller to plug devices into.  For my application, I use one to control heating and the other for cooling.  Buying dual stage will save you some space, but you are not saving in cost.  Single stage cost about $55, while dual is $105.  I imagine if it ever mulfunctions, it will not be a total lost.</div> <bR> <div> For heating, two 150W Ebo Jager heaters are connected to one controller.  When the lowest preset temp is reached, the controller turns on the heaters together.  This way, the temperature sensing differentiation between heaters is eliminated.  Either both ON, or both OFF, making the heaters more efficient and the ON time cycles are lessened.</div> <bR> <div> For cooling, a $6 fan from Home Depot is connected to the second temp controller.  When temp of water is too hot, the fan blows directly into the sump to cool the water.</div> <div> I prefer the Johnson model better.  It has a "screw-on" type of sensor rather than "solder-on" found in Ranco.  If you ever short out or need to replace the sensor, its a lot easier to replace on the Johnson.  Also the dimension of the Johnson unit is smaller by 10%-15%.  This is valuable to the already limited space inside the stand.</div> <div> I keep my tank between  82- 83 degree F.  It is alot easier and cheaper to keep the tank running at a warmer temperature rather than cold.  The tank had been stable at this temp for the last 4 years.</div> <div>  </div> </td> </tr></table></body>