$2h 16m since it was plugged in. Time 12:15pm My added sensor that sits in the tray is now reading nearly the same as the display readout. I figure it is only a fraction lower because it sits lower in the tray than the probe that comes down from the motor/display. My humidity reading shows 34% and the arrow on the humidistat on the incubator lid is right in the middle of the "Incubation Period" block. Temperature in my house, in this room, hovers around 67-70f and humidity is around 20-23%.$