14312Views13Replies

Author Options:

How to find hot side from a peltier element? Answered

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

Discussions

0
None
steveastrouk

5 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.

0
None
rickharrissteveastrouk

Answer 5 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.

0
None
AngelAscaniorickharris

Answer 5 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.

0
None
steveastroukAngelAscanio

Answer 5 years ago

No, not if you are careful, and quick.

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

0
None
icengAngelAscanio

Answer 2 years ago

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

0
None
rickharrisAngelAscanio

Answer 5 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

0
None
frollardsteveastrouk

Answer 5 years ago

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

0
None
rickharrisfrollard

Answer 5 years ago

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

0
None
sandy.12345steveastrouk

Answer 5 years ago

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

0
None
PaulA128

2 years ago

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

0
None
steveastrouksandy.12345

Answer 5 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.