Probes

[refrep]

Could anyone please help?
I have a number of probes & cant distinguish which is which PTC or NTC & is the NTC for the evaporator reading?:o

[B G Scott]

Could anyone please help?
I have a number of probes & cant distinguish which is which PTC or NTC & is the NTC for the evaporator reading?:o
PTC Positive Temperature Coefficient
NTC Negative Temperature Coefficient.

Most electronic controllers can identify which type is connected, but you should have them all the same ie. either all PTC or NTC

[Jundeb]

PTC Positive Temperature Coefficient
NTC Negative Temperature Coefficient.

Most electronic controllers can identify which type is connected, but you should have them all the same ie. either all PTC or NTC

Me too have bunch of this probes mixed up. i'm using a ID 985LX eliwell controller, but it can't distinguish which one is which. any help on how to distinguish?

[chemi-cool]

Check the rsistance at 20°C,

PTC = 1KΩ
NTC = 10KΩ

[Peter_1]

Me too have bunch of this probes mixed up. i'm using a ID 985LX eliwell controller, but it can't distinguish which one is which. any help on how to distinguish?

Eliwell probes, blue is NTC and grey is PTC or measure them like Chemi explained.

[Grizzly]

Hey Guys.
I thought it was simpler than that.
Meaning that a PTC - rise in temp = rise in resistance?
Therefore NTC - rise in temp = drop in resistance?
Or have I got it completely wrong?
Cheers Grizzly.

[monkey spanners]

Hey Guys.
I thought it was simpler than that.
Meaning that a PTC - rise in temp = rise in resistance?
Therefore NTC - rise in temp = drop in resistance?
Or have I got it completely wrong?
Cheers Grizzly.

Thats how i understand it, just warm one up and see which way the resistance goes to see what type it is, then there are a few different resistance too. Like 1k and 10k at the same temp for example.

[Peter_1]

In fact, there are more than hundred different NTC and PTC types.