You searched for: “thermointegrator
thermointegrator (s) (noun), thermointegrators (pl)
1. An apparatus for recording environmental warmth.
2. An instrument used to create a thermal model of an environment, measuring the warmth and coldness as it might be experienced by a living organism in that environment.
3. Any device for assessing the effective warmth or coldness of an environment as it might be experienced by a living organism, taking into account radiation and convection as well as conduction.

Conceived of as a thermal model of an organism, the device usually consists of a standard object (for example; a sphere, a cylinder), the surface temperature of which is measured while it is being heated internally at a standard rate.