[DIY] Remote Temperature Monitoring - Bambu Lab P1S

Although the Bambu Lab P1S printer does not have a chamber temp sensor, remote monitoring can still be done via the on-board camera by installing a thermometer in the chamber.

The 2 thermometer holders described here are simple upgrades. Just print the part, insert the thermometer, install in the printer and turn-on the camera. The STEP and Fusion 360 F3D files are on github

Temp monitoring is extremely useful when printing ASA to help preheat the chamber to 60°C, and to carefully control the ~1 hour cooldown of the chamber and printed parts to avoid warping. Details here: DIY Fan with Blast Gate

Happy printing to all !

Analog Thermometer

The thermometer is a basic $5 1.46" round analog model

It conveniently fits between the printer frame's upper rails, held in place by a simple holder:

The holder can be printed with any filament that supports the chamber temp target. In my case, a 60°C target ruled out PLA but was possible with anything else: PETG, ABS, ASA...

The temp ticks can barely be read as the P1S camera's resolution is crapadong. But knowing that the last 3 numbers on the dial are 40, 50 and 60 it soon becomes easy to estimate the value.

A big advantage of a mechanical / analog sensor is that it still works at high temp. Unlike the digital sensor below whose LCD becomes unreadable at around 55°C. Of course, both being designed for livable spaces, their accuracy is questionable above ~40°C (104°F).

 

Digital Thermometer

This one is easier to read via the camera feed. It uses this ubiquitous and cheap $2 LCD thermometer

Any other model or brand will do as long as the main body's dimensions are ~45x26mm, or this:

CAD model:

The sensor / probe is held in place in the thermals-decoupling recess with a 10mm ID O-ring, though an appropriately sized elastic band might do as well.

The two 20x3mm magnets are glued in place. They secure the holder firmly against the P1's frame to avoid displacement under the unrelenting slams from the toolhead's drag chain & filament tubing.

 

 And c'est fini. Time to get this printer a-cooking !