Phillips is coming out with a forehead, "electrode" temperature probe for continuous temperature monitoring. Haven't seen the data about accuracy, etc.
For single-point temps we use commercial tympanic thermometers.
Not sure what you mean by "comparing your temperature with pt." If you mean putting one hand on your forehead and the other on the patient's...well, I think that has entertainment value only.
We use cheap, disposable, plastic thermometers in the field. They seem to be accurate within +/- 2 degrees, i.e. worthless.
Only if you get the actual professional version. There's a consumer version, and while I generally don't recommend home products for ambulance use, it's accurate enough to pass FDA muster. It just won't last as long....cool easy fast and accurate right? but expesive??