Basically what the title says. I kind of assumed they were, but mine are not.

Right now my thermostat is at 81 and the probe is on the hot side, but my thermometer is reading 87.8 degrees on the hot side.

Also, they don't seem to be constant, the thermostat stays at a constant number unless I change it but the thermometer will fluctuate within a couple of degrees from one hour to the next.

These pics were taken at different times, but this is the thermostat and thermometer that I have...



(this is from before the snake even came home but it shows the thermometer)


If they are supposed to match I'd really appreciate any advice on how to remedy this situation, thanks!