Flameboss Pit Temp vs. Thermometer temp on my egg??

egginNthefreeworld

Ok, let me start off by saying I LOVE my flameboss 200 wifi. I do however have some concern/questions. I have made sure to calibrate my BGE temp gauge several times. Should it be the same as my pit temp on my FB? Its not. Last night I made a pork tenderloin (cooked indirect at 400, just wanted to get set and forget till it was done per the FB) and the BGE dome thermo was reading a 100 degrees (500) higher than what the pit temp says on the FB. This is about the highest heat I have used the FB on, but the dome thermo has always been reading about 50 degrees higher than the FB pit temp even on low and slows. Hoping this is normal? Thanks in advance for any insight.

bhedges1987

Your dome temp is always higher. Readjust your BGE thermometer one more time and attach your flame boss clip to the dome thermometer on the inside. 

bhedges1987

My dome runs about 25 degrees hotter than the grate temp for the first five or so hours at least 

caliking

The difference between grid temp and dome temp is expected. Just go with the the FB pit temp since that is what the controller is going by. 

The 100F difference is a bit odd. Maybe the FB pit probe was shielded in some way by a plate setter leg or it was too close to the meat?

SmokingPiney

The temps will disagree.  The FB's temp reading will also depend on where you clip the temp probe. I clip mine towards the back of the grate and I make sure I leave a couple inches of space between the clip and the meat. If I'm using the FB to run the cook, I will disregard the dome thermometer and let the FB do it's thing to get me to target IT.

I have noticed that the temperature reading between the dome and FB tend to merge after a few hours on a low and slow.

dougcrann

Grate temperature is always gonna be different than the dome. FlameBoss, their customer service is head and shoulders above everyone else that I have dealt with lately...if you have any problems with the controller just use the contact form on their site. They will respond within 1 business day. 

Carolina Q

My dome temp and DigiQ temp are always within a couple of degrees of each other. That's because I clip the DigiQ probe to the dome thermo stem.

Couldn't care less what the grid temp is. I understand it's supposedly lower, but have never checked it. My oven temp is measured at the top, BGE (and everyone else) puts their thermo at the top, recipes are given with dome temp... why would I care about grid temp?

Jeepster47

The temps inside the egg are not consistent from location to location.  You've got conduction, convection, and radiation energy all contributing in varied degrees to those differences.  If you have the pit probe on the edge of the plate setter shadow it will escape the radiated energy, but might be in the flow of hot air coming over the edge.  Bury it deeper into the shadow and then you'll also prevent the hot airflow from reaching the probe.  Bury it too deep and it might be close enough to the protein that it's absorbing energy and cooling the probe.

If you want the temps to be closer, then shield the dome thermometer from radiation and convection energy by placing a plate setter leg directly below it.  Place the pit probe such that it also is equally well protected by the plate setter, but at least a couple inches from the protein.  With that set up, you'll most like still be off by 25 or so degrees at the start of a low-n-slow ... fading towards equivalent temps by the end of the cook ... maybe!  You at least won't differ by 100 degrees.

Oh yes, Flameboss probes are good to 450 degrees ... you're right on the edge at 400 degrees, so make sure to protect the leads well or you'll be buying some replacements.

Robo2015

Trust in @Jeepster47.  I had a similar strange reading with my grate vs dome temp during a low and slow and he correctly predicted that my small fire had moved and was at the front of the egg (directly under the dome thermometer).