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How to find hot side from a peltier element? Answered

hi how to find hot side and cold side from a peltier element?

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DDG-2

2 months ago

The thermistor resistance allows me to calculate the temp on the cold side (that's where the thermistor is located). Is there any way to calculate the temp of the hot side using the temp of the cold side. Thank you for any help.

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steveastrouk

6 years ago

Put power in,
note polarity, Red is positive, Black is negative.
Note which side gets hot,
note which side gets cold.
Write it down.
Job done.

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rickharrissteveastrouk

Answer 6 years ago

Attach power place hand on device - Say ouch - You found the hot side.

PS is your hand is stuck you found the cold side.

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AngelAscaniorickharris

Answer 6 years ago

I understand steveastrok. If you buy a peltier cell and then you apply voltage without using heat disipators, BOTH SIDES GET WARM/HOT quickly, so you can't tell which is the hot side.

Honesttly frollard, ironic comments doesn't help in this community.

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steveastroukAngelAscanio

Answer 6 years ago

No, not if you are careful, and quick.

I have used Peltier cells in scientific applications for 25 years or more,

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icengAngelAscanio

Answer 3 years ago

Levity in science is like a wave riding a gigacycle in a magnetic field.

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rickharrisAngelAscanio

Answer 6 years ago

As far as I know the cell gets warm on one side and cooler on the other with an efficiency of around 5 - 10%.

You shouldn't need to heat sink the cooling side to get it to work.

http://en.wikipedia.org/wiki/Thermoelectric_cooling

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frollardsteveastrouk

Answer 6 years ago

I like it...it's like the weather reporting rope.

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rickharrisfrollard

Answer 6 years ago

Got one of those it's 100 correct! More than you can say for the weather Office

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sandy.12345steveastrouk

Answer 6 years ago

when applying voltage to the peltier it should be attached with the heat sink otherwise it will be damaged

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PaulA128

3 years ago

The vast majority of TECs have an ID printed on their heated side.

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steveastrouksandy.12345

Answer 6 years ago

Not if you do it quickly. A few seconds is fine. They are only damaged if the elements reach over 150 C, which can take many seconds.