Temp Controller RNR, SNR what do they mean?

Hamilton, I don't get it.

How do those links answer my question. Building the Sous Vide is the simple part and I don't need instructions for that.

Lead, follow or get out of the way.

Dave

Since the PID controller will have a pulsed output for a SSR that is the one to use. The power will be going on and off a lot so you will not want to hear a relay clicking away whislt cooking, not to mention wearing out the relay contacts etc.

Of all the links, did any one of them use anything other than a SSR ?

Sorry to waste your time, I won't do it again.

As I read one discussion, an RNR model has a built-in relay which is capable of switching a specified class of loads. An SNR model has a low-voltage output which is intended to switch an external relay (commonly an SSR, as you note).

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Look at the numbering scheme for the TAx series PID controllers at

It shows that this model controller has the capability of two main outputs, and an Aux output. The character "R" in any of these positions means that it has relay contacts at the output. The character "S" in any of these positions means that it has a solid state relay (SSR) at the output. The character "T" in any of these positions means that it has a silicon controlled rectifier (SCR) at the output. The character "N" in any of these positions means that there is no output for that position.

For example, the number for model TA4-RNR indicates that the first output is a relay; the second output is None; and the third (Aux) output is a relay.

Hope that helps Dave M

Dave M, thanks very much. That explains it nicely for me. Very much appreciated the detail you went to.

Dave

IS a pid's SSR low voltage output ac or dc?

DC

--sp