Sterilizers
Mushroom Substrate Sterilizers &
Barrel Steamers
Steam pasteurization for bulk substrate, true autoclave sterilization for grain and agar media โ 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 โ bulk substrate, nutrient-dense media, or a barrel you want to convert yourself.
Barrel Steamer
Steam at 160โ180ยฐF kills competitor organisms while leaving beneficial thermophilic bacteria intact. The right tool for straw, manure, hardwood, and coco coir โ anywhere total kill would hurt yields by also eliminating the helpful microbes that suppress contamination.
See barrel steamer guide โPressure Autoclave
Saturated steam at 250ยฐF under 15 PSI eliminates every living organism, including heat-resistant bacterial spores. Required for grain spawn, agar plates, and liquid culture media โ anywhere nutrient density would otherwise let contaminants outcompete your mycelium.
View 150L autoclave โControllers & 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 โ15 products