Yes the thermostats do measure the temps and adjust to them, but they are not always right on, for example some members have to set the maximum temp of their thermostat at 96 to achieve an actual maximum of 93.
I believe Robin was just trying to find out if there does exist something more accurate and reliable than the $12 accurites for peace of mind with her incubator. The temperature variances may not be major with most inexspensive digital thermometers but a few degrees does make a difference in an incubator. There is the option to buy a few thermometers and compare but I also would like to know if there are more reliable thermometers out there.
And Mcavana, you beat me to itDarn these slow fingers..