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Old 11-02-2011, 01:42 PM   #1
RonRock
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Default Where to Buy Thermocouple or RTD?

Anybody have a good source for Thermocouples or RTD's? I recently bought a PID that will work with either type sensor. I don't know the difference between the two, so how do I decide which I need?

I found thermocouples at Automation Direct but they run about $30.00 plus shipping. Seems a little expensive for a temp sensor. I could make my own if I knew what parts to buy. Maybe I could save a buck that way. IDK just looking for suggestions.

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Old 11-02-2011, 02:20 PM   #2
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May I suggest Auberins.com. They have both thermocouple and RTD.

I have 2 RTD temperature probes. I've heard the wires are a little more forgiving for RTD than Thermocouple. but I have no experience with a thermocouple.

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Old 11-02-2011, 03:37 PM   #3
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I just picked up two of these after a recommendation from this forum:

http://www.ebay.com/itm/250867592524...84.m1497.l2649

There's also these beasts:

http://www.ebay.com/itm/RTD-PT100-Te...item3a53cc96fc

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Old 11-02-2011, 04:01 PM   #4
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If you buy an Ebay special from China and it doesn't work you are basically out of luck. Shipping it back or trying to get money back is tedious at best. Experienced that.

If you buy from Auber, you pay more but get support and someone who will make it good. I blew out two SSR's and he sold me replacements at half price to help me recover from a disaster caused by Ebay China components that failed and caused the blow out.

I can't help but promote his good deed.

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Old 11-02-2011, 04:10 PM   #5
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There was an article in BYO on how to make your thermometers/probe IIRC...

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Old 11-02-2011, 04:21 PM   #6
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Thanks guys lot of good input.

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Old 11-02-2011, 04:24 PM   #7
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+1 buy from auber.

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Old 11-02-2011, 04:48 PM   #8
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grainger.com search for "pt100" (which is a RTD)

there are several different probe legnths, ranging from $14 to $20

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Old 11-02-2011, 05:18 PM   #9
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Quote:
Originally Posted by stlbeer View Post
May I suggest Auberins.com. They have both thermocouple and RTD.

I have 2 RTD temperature probes. I've heard the wires are a little more forgiving for RTD than Thermocouple. but I have no experience with a thermocouple.
Just a heads up: The probes from Auber are too small a diameter for thermowells. The probes at AutomationDirect are actually a good price and a high quality product.
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Old 11-02-2011, 05:24 PM   #10
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I just purchased 11 of these 4 wire Watlow RTD with spring nuts 6 ft amor cable you can't beat it.
http://www.ebay.com/itm/200620995759...84.m1497.l2649

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