Food, Beverage and Dairy
Food, Beverage and Dairy

ITM-51, ITM-51R Relative turbidity meter

Turbidity Sensors, CIP Controls, IO-Link, Process Analytics

Modular, front-flush turbidity sensor for low to high turbidities, with IO-Link

Hygienic, front flush turbidity sensor for media with a turbidity of 200…300.000 NTU equivalent in pipes from DN25 on.

  • Active phase separation in the production process: Precise differentiation of product / mixed phase / water
  • Minimisation of resource losses
  • Frontflush sensor in compact and modular design
  • Reduction of the water consumption and waste water treatment cost
  • Minimisation of the duration of a CIP-cleaning process
  • Glass-free sapphire optics
  • Flex-Hybrid: Digital IO-Link and analog 4…20 mA in parallel
  • Modular design: configurable from the low-cost basic version to the high-end model
  • Front-flush sensor: Simplified pipe cleaning (pigging possible) ideal for media with adhesive fibres or particles
  • Extended temperature and pressure range
  • Independent to reflexions at small diameters or electro-polished surfaces
  • No color dependency (wave length 860 nm)
  • High reproducibility and fast response time
  • Selectable output value (%TU, NTU, EBC)
  • Extended measurement range: 200…300.000 NTU equivalent

Application examples

  • Phase separation products (whey-cream-milk)
  • Separator control
  • CIP-return line (monitoring of pre-rinse water to product leftovers)
  • Automation of the yeast harvest and the separator monitoring in breweries
  • Quality control
  • Leakage control of filters, gasket, valves

All details about IO-Link properties, parameters, diagnostics, events and more can be found in the IODDViewer. Just click here.

Add-On Instructions (AOI) are available at

Further Information:

  • The ITM-51 is compatible to the antecessor ITM-3.
Key Benefits:
Product Information:

Technical Specification

Process Connection CLEANadapt | Tri-Clamp | Varivent
Wetted material Stainless steel 1.4404 (316L), Ra≤0.8 μm | Optics sapphire
Measuring range 0…300.000 NTU | 0…200 %TU | 0…75.000 EBC
Accuracy ±3% of the measurement value
Available versions Compact | Remote
Temperature range process -10…130 °C
Temperature range CIP/SIP 140 °C / max. 120 min.
Operating pressure -1…20 bar
Communication 4…20 mA (4-wire loop), IO-Link
Product Technology Range

Click here to view all our Turbidity Sensors

Technical Support: How to videos

Click here to view the playlist of our How to videos

The values shown are the performance limits within the product line. The product-specific data for each individual configuration can be obtained from the product information



Phase transition with turbidity measurement

ITM-51 Turbidity Meter Uses an LED light source which improves stability in measurement


Key Benefits:
Product Information:
User Manuals:

Process Connection

Configuration and 3D Data