Food, Beverage and Dairy
Food, Beverage and Dairy

ILM-4 Conductivity Meter

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

Hygienic Inductive Conductivity Meter for liquid media up to 999 mS/cm, with IO-Link

Our quality promise: Extended Warranty 5 years

  • Extremely short response time of 1.2s for highest efficiency
  • Flex-Hybrid Technology: Digital IO-Link and analog 4…20 mA in parallel
  • Accurate phase separation of different media means less resource losses and cost optimization
  • Maximum use of the cleaning agents in CIP processes thanks to correct re-guidance into the respective storage tanks
  • Minimum cleaning time and water consumption: active switch-over after reaching the desired value by inline analysis and not by passive, pre-set time control
  • Precise concentration of the cleaning agents
  • Modular design: configurable from the low-cost basic version to the high-end model
  • Add-On Instructions (AOI) are available at
Key Benefits:
Product Information:

Technical Specification

Process Connection CLEANadapt G1" / Tri-Clamp / Varivent
Insertion length 20 / 50 mm
Wetted material Stainless steel, 1.4305, SW 36 mm
Wetted material 2 PEEK (FDA conform)
Measuring range 0.000...0.001 (1 μS/cm) up to 100...999 mS/cm(1000 μS/cm)
Accuracy Slope ±2% of measurement value | Offset ±20 μS/cm
Available versions Compact | Remote | Horizontal head | Vertical head
Temperature range process -10…130 °C
Temperature range CIP/SIP 150 °C / max. 60 Min.
Operating pressure max. 16 bar
Communication 4…20 mA, IO-Link
Dimensions / weight ø 63 mm, approx. 750 gr.

Benefits in production and CIP / SIP processes:
ILM-4 with IO-Link and 4...20 mA enables an active, automated and temperature compensated phase separation. This applies both to different media in production processes and to the CIP / SIP return flow of acid / caustic/ water. These media can be drained or returned to the storage tanks in the highest possible grade by means of precise inline conductivity measurement. The multiple use of the cleaning media ensures in addition maximum cost efficiency and environmental protection.


Benefits in cleaning agents control:
For an optimal and reproducible cleaning result, each cleaning agent must be concentrated to the specified value by re-dosing with concentrate and fresh water. This is ensured by the highly precise measurement of conductivity with the ILM-4.


Advantages of the ILM-4 conductivity sensor:
Extremely short response time (1.2 s) for maximum efficiency / Ready for IIOT: digital IO-Link interface and analog 4...20 mA data transmission in parallel / Precise phase transition of different media means less product loss and cost reduction / Optimum multiple use of the cleaning chemicals due to correct return to the respective tanks / Minimization of cleaning time and water consumption: inline conductivity analysis for active switching after reaching the desired value and not after a passive, fixed time / Precise concentration control of the cleaning agents / Reliable product monitoring and quality assurance / Very favourable price-performance ratio

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



ILM 4 conductivity meter machined toroid design

PEEK toroid of the ILM-4 conductivity meter doesn’t crack

Demo of the operational screen selection on the ILM-4 conductivity meter

Instructions on how to change the operating range of an ILM-4 conductivity meter

How to change the temperature units on an ILM-4 conductivity meter

How to program the Temperature Compensation parameter of an ILM-4 conductivity meter

How to password protect the programming of an ILM-4 conductivity meter

How to remove the password lock of an ILM-4 conductivity meter


Key Benefits:
Product Information:
User Manuals:

Configuration and 3D Data