QB1/PSR pressure control assembly is providing pressure to a reflow oven used for soldering of surface mount electronic components to PCBs.
Reflow Toaster Oven - a Qwiic Hack! - News - SparkFun Electronics
Toaster oven reflow controller - Henrik's Blog
Toast-R-Reflow: Yet Another Toaster Reflow Oven Conversion : 8 Steps - Instructables
Reflow Toaster Oven - a Qwiic Hack! - News - SparkFun Electronics
Controleo3 Reflow Oven
Reflow Oven Controller - Project Guidance - Arduino Forum
Project, Home-brew SMT Reflow Oven
Reflow Oven Controller - Project Guidance - Arduino Forum
Open Vapors - Open Source Toaster Reflow Oven - Bald Engineer
Test Run of DIY PCB Reflow Oven Made of Two Toaster Ovens and Controleo3 Kit