Another way to combat dust etc, is to setup an air purifier in the location where you will be pouring approx 24 hrs before starting and keep it running throughout the project.
Staircase Drawers !
Solar Powered RGB LED Magic Pathway
DIY Variable Power Supply With Adjustable Voltage and Current
In these pics i was using the K thermocouple that came with the controller. I think this thermocouple isn't great though because as you see in these pics it's spot on, but at higher temps there is an offset. I can't fathom why that would happen though since thermocouples are supposed to have linear response.Anyway,I swapped in a Thermoworks thermocouple and it worked perfectly. So I'll probably ditch the one that came with it.
The chinglish instructions with these controllers is very hard to decipher!Nice 'ible. Very well written. It helped a lot. :-D
UV LED Exposure Box
PID Temperature Controlled Oven
Concrete LED Light Cube
Arduino Data Glasses For My Multimeter
Troubleshooting + Wrap-up
Casting In Pre-made Molds
Mixing + Pouring Concrete
DIY 5500mW Laser Engraver / Cutter
Reclaimed Whiskey Barrel Coffee Table