ITM-51 Turbidity Meter

Cost-effective optical sensor for your process!

The ITM-51’s compact, modular design is a highly configurable, cost-effective solution to meet your specific application needs. With expanded capabilities in pressure, temperature and measuring range, the ITM-51 can now go beyond the typical applications given to turbidity sensors, making the ITM-51 capable of furthering your ability to meet sustainment goals.

NOW available with 


  • Phase separation of products (whey-cream-milk)
  • Water flush control
  • Separator control
  • CIP-pre-rinse control
  • Yeast harvest in breweries
  • Product quality control


  • Compact, modular design
  • Extended temperature and pressure capabilities
  • Measurement is not influenced by color (wave length 860 nm)
  • High reproducibility: ≤ 1 % of full scale
  • Selectable output units (%TU, NTU, EBC)
  • Extended measurement range: 200…300.000 NTU equivalent

Product Specifications:

  • Open, freely flushing design cleans easily and provides fast reaction to product changes.
  • CIP-/SIP-cleaning up to 140 °C (284 °F) / maximum 120 minutes
  • 3-A compliant Tri-Clamp process connection

Enclosure Materials:

  • Product contacting materials compliant to FDA
  • Sensor made of stainless steel
  • Optics made of high resistant sapphire
  • Process connection G1/2″ hygienic, Tri-Clamp or Varivent,
    adapters available for milk pipe (DIN 11851), DRD, APV et al.
Principle of Operation
  • Infrared LED emits light into the media through the sapphire lens
  • Receiver measures the amount of light reflected back by particles suspended in the media
  • A signal is generated that is proportional to the amount of particles = relative turbidity
  • The relative turbidity is based on the Negele calibration standard and is displayed in %TU, NTU or EBC