I've finally got my RIMS kit set up, and it's working in theory; however, I'm seeing some wonky mismatches between the measured temp and the actual temp of the wort returning to the MLT (10-14 degrees f in some cases). My probe is 50mm, and is short enough that it doesn't QUITE reach the input (for context, I have Bobby's old RIMS kit).
I currently have the tube propped up on a small angle to prevent bubbles (made that mistake the first time), and it seems like the liquid isn't always covering the probe. I was thinking I should upgrade to a 100mm probe, but don't want to if it's not necessary.
So, for those more familiar with the fluid dynamics of a RIMS tube, should I be concerned? Does the liquid actually fill the full volume of the tube, even "up past" its inlet, or is there actually a significant air pocket there to worry about?
I currently have the tube propped up on a small angle to prevent bubbles (made that mistake the first time), and it seems like the liquid isn't always covering the probe. I was thinking I should upgrade to a 100mm probe, but don't want to if it's not necessary.
So, for those more familiar with the fluid dynamics of a RIMS tube, should I be concerned? Does the liquid actually fill the full volume of the tube, even "up past" its inlet, or is there actually a significant air pocket there to worry about?