Mini Digital Hygrometer Thermometer Gauge Housing for P1 Series Printers.
Purchased the actual meter from Amazon:
https://www.amazon.com/gp/product/B08H88DJWM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
In order to feed the probe through this housing and into the printer, you will need to remove the plastic probe protector with a pair of pliers or snips (the ones you use to cut filament).