The ornamental design for a heatdetector, as shown and described.
FIG. 1 is a top view of a heat detector showing an embodiment of the design of this invention.
FIG. 2 is a side view thereof, the opposite side being a symmetrical.
FIG. 3 is an end view thereof, the opposite end being symmetrical.
FIG. 4 is a detailed side view of a heat detector taken along line 4—4 of FIG. 1; and,
FIG. 5 is a back view thereof.
The heat detector is a patch that has a self adhesive that is applied to an animal such as a cow, and a scratch off side that is exposed to be rubbed by a mating animal. In one embodiment, a release liner covers the adhesive side. In one embodiment, plural detectors are disposed on a release sheet.