Temperature Sensor recommendation for measuring panel temperature
Diodes are not as good as diode-connected transistors in this kind of multi-current \$\Delta V_{BE}\$ temperature measurement circuit. I note that the part number you specify is actually a BJT, not a diode. 

Recall the ideality factor that is close to 1 for a diode-connected transistor and more like 2 for a diode.



The manufacturer also has detailed recommendations for the type of transistor to be used, and recommends that large power transistors not be used. 

You could try a small power transistor such as a BD159STU (That one is in the convenient TO-126 through-hole package), or simply make a small PCB with the SMT part on one side and no tracks or vias on the other, and attach that to the panel (that's probably what I'd do- it could be connectorized, and made as a snap-off bit attached to some other board).