Sterilizers
Mushroom Substrate Sterilizers &
Barrel Steamers
Steam pasteurization for bulk substrate, true autoclave sterilization for grain and agar media — plus DIY controllers and kits for builders. 55-gallon barrel steamers in basic and PID-controlled configurations, carbon and stainless steel, 110v and 220v.
Pasteurization, Sterilization, or DIY?
Mushroom cultivation calls for two different heat-treatment methods, often confused for each other. The right tool depends on what you are treating — bulk substrate, nutrient-dense media, or a barrel you want to convert yourself.
Barrel Steamer
Steam at 160–180°F kills competitor organisms while leaving beneficial thermophilic bacteria intact. The right tool for straw, manure, hardwood, and coco coir — anywhere total kill would hurt yields by also eliminating the helpful microbes that suppress contamination.
See barrel steamer guide →Pressure Autoclave
Saturated steam at 250°F under 15 PSI eliminates every living organism, including heat-resistant bacterial spores. Required for grain spawn, agar plates, and liquid culture media — anywhere nutrient density would otherwise let contaminants outcompete your mycelium.
View 150L autoclave →Controllers & Kits
Already have a 55-gallon drum, or want to build cheaper than buying a complete unit? Add a PID controller plus heating element to convert your own barrel into a steam pasteurizer, or grab the full DIY kit with every component ready to install.
Call to plan a build →15 products
