There are a few other brands but you won't go wrong with the Maverick either. It will do both your food and chamber temp, plus the wireless capability is awesome ......... The ET-732 and ET-733 get really good reviews.
Just got the Thermapen a couple of weeks ago and now wonder how I ever cooked without it. It is the best I've ever found. Besides the Maverick et732 is there another good thermometer for checking the cooking space temperature? The $59 isn't bad, just wondered if there were any others out there.