Haffmans OptHaze-i In-line Turbidity Meter

Inline device used to determine the turbidity of beer and other beverages according to the MEBAK standard.

Product specs




Haffmans’ OptHaze-i In-line Turbidity Meter measures the scattered light caused by particles and incorporates the latest standards from MEBAK (Mitteleuropäische Brautechnische Analysekommission):

  • 90measuring angle
  • Red light 650 ± 30 nm to eliminate most of the effects of color of the beverage
  • Formazin calibration standard

Particles smaller than 1 μm, such as proteins, mainly cause the light to be scattered under 90o and are measured with the 90o light detector. Particles that are larger than 1 μm, such as diatomaceous earth, yeast and fruit pulp, mainly cause the light to scatter forward. To increase the expressiveness of the turbidity measurement, an additional light detector measures the forward scattered light under a 25o angle.

The In-line Turbidity Meter can be installed anywhere in the process where the determination of turbidity is critical to the quality of the beverage. The turbidity sensor is constructed in accordance with the CE hygienic directive and EHEDG design recommendations. It is easily mounted in a Varivent® process connection and executed as a smart sensor, ready to use, calibrated in a range of 0 to 20 EBC. The OptHaze-i is designed for simultaneous measurement of 90o and 25o turbidity. The user-friendly control unit can be supplied in either field or panel mounted versions and up to two turbidity sensors can be connected to each control unit.