Zimmerman Industries, Inc. is a Pennsylvania-based manufacturer of volumetric (mobile) concrete mixers. We continue to be the driving force within the mobile volumetric concrete industry for more than 50 years. As a way to provide opportunities for your business and help meet your needs, our custom Zim-Mixer volumetric concrete mixers are designed to carry sand, stone, cement, water, and admixtures in separate compartments and dispense the exact amount needed at the job site without waste.