While starting up my MES30 this morning to get up to Temp I used my ET 732 Temp Probe for the first time and noticed 20* degree

swing in temp! Which should I believe? Going to Smoke a Pork Butt and want to maintain 230* degrees...................................


MES30 holding at 255* & ET732 holding at 275* for test purposes.

Thanks for any help.

Stoney