What makes one thermocouple better than another?

Mark Eatherton

The saying "They don't make'em like they used to" is an appropriate axiom for thermocouples.

We've tried using "HUSKY's" (commercial, thicker unit), top of the line Honeywell, top of the line Johnson, and they ALL seem to fail in about 1.5 years, almost like clock work....

We've gotten to the point that if we're there doing ANYTHING, and it has a thermocouple, we replace it.

Sad but true.

ME

JohnNY

Answer me that...

...since you're so smart.

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Mark Custis

reliabilty

Thats it.

I use Tradeline 36".

Rick_89

What if

you need a 48", 24" or 12"? Still a 36"?

bob young

all products no quality control anymore

have had defective ones of every manufacturer. simply luck of the draw. don't even question it anymore. buy two. defective...in the garbage & move on.

Mark Custis

Rick

If it needs a 48" it is very old and needs to retire.

LOL

Roll up the extra or do not unwind it.

bob_46

Better

The robustness of the hot junction. You pay more money you get more metal.

Unknown

Thermocouples

I have a 15 year test on going testing various thermocouples on 25 different jobs. My results show only two are reliable one is the Johnson (now Baso) Husky and the Honeywell Q309 or 340.

For difficult jobs with corrosion issues the Johnson K16LRA nickel plated high temperature corrosion resistant thermocouple is best. I used those on Pizza Ovens when I had my restaurant service business.

All the others are not reliable.

Mark Custis

I send my

share of the force to you.

JohnNY

Thanks

I'm getting tired of this call: "I thought after I'd spent $X,000 on your new boiler, I'd get a few years without having a problem!"

I'm thinking of switching to spark ignition on cast iron.

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bob young

standing pilot still best bet

but John, a thermocouple is a lot cheaper than a G-60 pak. they are also unreliable. just my opinion . over the years i have gotten tortured by spark ignition.