Make a High Temperature Heating Mantle скачать в хорошем качестве

Make a High Temperature Heating Mantle

In this video we're going to make a heating mantle that can reach 700 degrees Celsius. The most important component is an insulated heating tape. I get my tapes from omega engineering http://omega.com (for americans) http://omega.ca (for canadians) The model number i used was STH051-040 Be sure you're looking the right model number. The $103 tape shown in the picture on the website is NOT the tape I use in the video. Mine was $47. You can use more powerful tapes if you consistently heat larger apparatus. Once you have the tape, wind it up into a roll and then mold the roll against the object you wish to use the mantle for. This is so you can get the right shape. To hold the shape, use stiff iron wire to tie it up. For faster heating and better energy efficiency, put the tape and wire assembly in a stainless steel thermos. Make sure there are no plastic parts around it as those will melt. Now bend the wire down over the lip of the thermos. And that's your heating mantle. I strongly recommend having some sort of power control as the tape can easily get so hot that it melts. I personally use a variac autotransformer. These tend to be expensive so a much cheaper alternative is a light dimmer switch. The best option is a PID controller for precise temperature control. In terms of safety, never touch the tape or the thermos while the mantle is plugged in. Even though it's insulated you shouldn't rely on that protection. Always assemble your apparatus first, and then plug it in. When you're done, unplug it and then handle your apparatus. Another safety layer is to use a ground fault protection device on your power supply. We'll be using his heating mantle to distill sulfuric acid.