Figure 1

Schematic view of the test cube. The top face is left open to allow for filling with ground beef. The polyamide grid is placed firmly over the open side parts. The catheter is placed perpendicular to the polyamide grid. The polyamide grid on the neighboring side has a small slit allowing the temperature sensors to be inserted into the beef core. The sensors are placed parallel to each other and perpendicular to the catheter tip. The distances of the sensors to the catheter tip/polyamide grid surface are 0, 2, 4, and 6 mm.