Try the crimp terminal lug method under your T0220 clamp, they are only a nickle. Red, blue, or yellow, depending on TC wire size and if you shrink sleeve and epoxy it. Omega sells good stuff, the tape they put on those works well, it is like Fiberglas? Turns brown over time and at higher temperatures. Hangs on like crazy. On 4/30/2010 5:10 AM, Mark E. Skeels wrote: > Ok, so what I did was this: > > I called Omega$. > > They pointed me to two products. > > * A 30ga thermocouple with an adhesive insulating pad. > * a thermally conductive epoxy. > > I'm going to try both. > > I have 6 TO-220s that run at higher DC offsets. > > I'm going to try cutting down the sticky pads on the thermocouples and > sticking them to the sides of the TO220s. > > I'm also going to try epoxying some existing thermocouples to short > lengths of copper wire and then tacking that wire to the TO220 tab. > > I'm not looking for high accuracy here; just making sure that the > devices stay within spec. > > Thanks for the suggestions; I'll keep them in mind for next time. > > So it's back to coding while I wait for the stuff to arrive. > > Mark Skeels > Engineer > Competition Electronics, Inc. > TEL: 815-874-8001 > FAX: 815-874-8181 > www.competitionelectronics.com > > > Mike Hagen wrote: > >> Yes, Platinum is the way to go, and EXPENSIVE! Linear is NICE! >> I have controlled medical stuff to a few tenths of F with Platinum Probes. >> Too $ >> >> On 4/29/2010 3:31 PM, Xiaofan Chen wrote: >> >> >>> On Fri, Apr 30, 2010 at 1:09 AM, Mike Hagen wrote: >>> >>> >>> >>> >>>> No sense in spending lot of money on special TCs. +/- a few degrees F >>>> is all you get anyway. >>>> >>>> I have done this many times. I made my own TC by twisting the ends of >>>> the TC wires tight and spot weld with a battery. >>>> I just bought a bulk length of TC wire. >>>> A little ball will form at the tip. >>>> >>>> >>>> >>> In the current job, we buy the spot welding machine and TC wires >>> to make our own TC as well due to the large quantity of TC needed >>> for UL testing. >>> >>> In the previous job, either TC or PT100/PT1000 is used. PT100/PT1000 is >>> for smaller parts. Then we had the Agilent 3470 Multiplexer and >>> use Agilent's TC (expensive) for some testing. For some potted >>> samples, you had to throw away the TCs after testing and it >>> became quite expensive at times (for Intrinsic Safety product, >>> many temperature testing is necessary). >>> >>> >>> >>> >> >> -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist