LDL200 ifm Hygienic Inductive Conductivity Sensor IO-Link 316L

Product Overview

• LDL200 is an ifm inductive conductivity sensor.
• It measures conductivity and temperature in liquids.
• It works without contact to the medium.
• This makes it ideal for hygienic CIP monitoring.
• The body is stainless steel 316L with PEEK wetted parts.
• It sends data by IO-Link or 4…20 mA.
• It is built for food, drink, and pharma lines.

Technical Data

• Brand: ifm
• Model: LDL200
• Series: LDL inductive conductivity sensor
• Type Code: IND CONDUCTIVITY HYG ASF-V
• Measuring Principle
  • Inductive, contactless
• Measured Variables
  • Conductivity
  • Process temperature
• Conductivity Range
  • 100…1000000 µS/cm
  • Resolution: 1 µS/cm (0…10000)
  • Resolution: 10 µS/cm (10000…100000)
  • Resolution: 100 µS/cm (100000…1000000)
• Temperature Range
  • -25…150 °C
  • Resolution: 0.1 K
• Accuracy
  • Conductivity: 2 % of value ± 25 µS/cm
  • Repeatability: 1 % of value ± 25 µS/cm
  • Long-term drift: 0.5 % of value ± 25 µS/cm
  • Drift: 0.1 % of value per K
  • Temperature: < ±0.2 K (20…50 °C)
  • Temperature: < ±1.5 K (-25…150 °C)
• Response Time
  • < 2 s conductivity (T09, damping = 0)
  • < 25 s temperature (T09)
• Process Connection
  • G 1 external thread, Aseptoflex Vario
• Media
  • Conductive liquids: water, milk, CIP liquids
  • Medium temp: -25…100 °C (up to 150 °C for < 1 h)
• Pressure
  • 16 bar (1.6 MPa)
  • Vacuum: -1000 mbar
  • CRN max. working pressure: 12 bar
• Materials
  • Wetted: PEEK
  • Housing: stainless steel 1.4404 / 316L, PEEK, PEI, FKM
  • Wetted surface: Ra ≤ 0.8 µm
• Communication
  • M12 connector, 4-pin, A-coded, gold-plated
  • Protocol: IO-Link only
  • IO-Link rev 1.1, COM2 (38.4 kBaud)
  • Standard: IEC 61131-9
  • SIO mode: no
  • Master port type: A
  • Analog data: 1
  • Min. cycle time: 6.4 ms
  • DeviceID: 922
• Electrical
  • Supply: 18…30 V DC
  • Current: < 100 mA
  • Protection class: III
  • Reverse polarity: yes
  • Power-on delay: 2 s
  • Analog out: 4…20 mA, max. load 500 Ω
• Environment
  • Operating: -40…60 °C
  • Storage: -40…85 °C
  • Protection: IP 68 / IP 69K
  • IP 68 test: 7 days at 3 m depth
  • EMC: DIN EN 61000-6-2, DIN EN 61000-6-3
  • Shock: 50 g (11 ms)
  • Vibration: 20 g (10…2000 Hz)
  • MTTF: 129 years
• Physical
  • Weight: 692.6 g
  • Envelope: see official scale drawing
• Approvals
  • CE, UKCA, EHEDG, FDA
  • EC 1935/2004, 3-A, CRN, FCM
  • UL file: E364788
• Lifecycle
  • Active, no EOS notice

Best Fit Equipment and Applications

• CIP systems
  • Watches cleaning strength in real time.
  • Confirms rinse water quality.
• Food and drink lines
  • Milk, juice, beer, and soft drinks.
  • Tracks product changeover by conductivity.
• Pharma and biotech
  • Hygienic tanks and piping.
  • Water for injection loops.
• Water treatment
  • Process water and brine lines.
  • Concentration control.
• Skids and modules
  • IO-Link masters and PLCs.
  • Aseptoflex Vario adapters.

FAQ

• Q: Can it read low-conductivity water?
  • A: It starts at 100 µS/cm. For pure water below that, pick another sensor.
• Q: Does the sensor touch the liquid?
  • A: No. The coil sits behind PEEK. The medium never meets metal electrodes.
• Q: How do I clean it safely?
  • A: Run standard CIP cycles. PEEK and 316L handle common caustic and acid wash.
• Q: What happens on a long steam cycle?
  • A: Keep steam above 100 °C under one hour. Longer heat shortens seal life.
• Q: Can I swap it into an old 4…20 mA loop?
  • A: Yes. Set the analog output for conductivity or temperature. Keep load under 500 Ω.