No bimetal thermometer can be trusted. No matter who makes it.

Try this.

https://www.thermoworks.com/Smoke?gclid=EAIaIQobChMIppfh1M_e4gIVkK_sCh1W7QJ9EAAYASAAEgLhxvD_BwE

They go on sale all the time.

Gun Shows are almost as comical as boat ramps in the Spring.