I have two digital thermometers, one has worked well for me and the other is a little cheaper and used as a backup. I hooked up my good thermometer (wireless) and it wouldn't sync. So I took out my back up thermometer and connected the probe from my good thermometer to back thermometer display and it worked. This morning I decided to put the other probe in the meat as well and it is giving me a different reading. Based on the readings below, should I just trust the old probe and thermometer? I am smoking a pork butt to 205. Should digital probes work well together if they are a different brand?
New probe + Old display = 183 degrees
Old probe + Old Display = 159 degrees
Analog meat thermometer = ~153 degrees