The National Manufacturing Co. Risograph is a laboratory equipment that measures yeast activity. It is a type of photometer that uses a light beam to measure the absorbance of a yeast solution. The absorbance is then used to calculate the yeast activity.

The Risograph is a versatile and reliable instrument that is perfect for laboratories of all sizes. It is easy to use and maintain, and it provides accurate and consistent results.


  • Measures yeast activity
  • Easy to use
  • Reliable
  • Accurate
  • Consistent


  • Quickly and accurately measure yeast activity
  • Identify and troubleshoot yeast problems
  • Improve the quality of your products
  • Save time and money


  • Bakery
  • Brewing
  • Winemaking
  • Dairy
  • Pharmaceutical

Key Points

    • The Risograph is used in the AACC Method 89-01.
    • The machine uses sealed chambers containing dough or yeast slurry samples to measure outgassing.
    • The outgassing is beneficial in determining yeast activity and dough properties.
    • The RisoSmart computer software charts all of the data in an easy to use format.