If you don't need the built-in handle and display, you can get a (much) better sensor for the same price: not that this is better, it's just an example for how a dongle-only sensor looks like: notebookcheck.net/Thermal-Master-P1-Hands-On-Budget-thermal-camera-that-is-built-to-last.1165482.0.html
Thermal Master takes aim at the commercial thermal camera market with a capable offering that costs a fraction of the competition. With dual cameras, PC software compatibility, and a rugged build, this camera is ready for field work.