The TuYa ZTH05 Zigbee temperature sensors are cheap but work well. Unfortunately they lack any kind of stand. I designed multiple versions to work with and without the sticky tape that is already on the back of the sensor:
Version 1 is designed to be used with the double sided tape, the others do not require it. Pick the one you think fits your needs best.
You may have to scale up the “glueless” models a little depending on how accurate your printer is calibrated, it is a snug fit.
Print laying on the side (the STLs are oriented correctly). The “glueless” stands require supports.
The author marked this model as their own original creation.