SI6800 IFM Flow Meter – SIR11ABBFPKG/US-100-IPF

The IFM SI6800 is a thermal flow switch for hygienic applications in the food and beverage industry, designed to monitor the flow of liquids and gases with high sensitivity and reliability. Featuring Aseptoflex Vario process connection, a probe length of 55 mm, and temperature resistance up to 140°C for SIP, it provides excellent process stability in demanding sanitary environments.

Technical Specifications

Model: SI6800
Manufacturer: IFM
Product Series: SI Series
Sensor Type: Flow switch for hygienic systems
Measuring Range:
• Liquids: 3…300 cm/s
• Gases: 200…3000 cm/s

Process Connection

• G 1 external thread (Aseptoflex Vario)
• Installation length (EL): 55 mm
• Probe length: 55 mm Probe diameter: 7.7 mm
• Surface finish (wetted): Ra < 0.4 µm / Rz 4

Electrical Characteristics

• Operating Voltage: 19–36 VDC
• Current Consumption: < 60 mA
• Protection Class: III
• Reverse Polarity Protection: Yes
• Power-On Delay: 10 s
• Electrical Connection: 1 × M12 connector (A-coded, gold-plated contacts)

Output Configuration

• Total Outputs: 1
• Digital Outputs: 1 (PNP, NO/NC configurable)
• Output Signal: Switching
• Voltage Drop: ≤2.5 V
• Current Rating: 250 mA
• Short-Circuit / Overload Protection: Yes (pulsed)

Measuring & Setting Ranges

Liquids:

• Setting Range: 3…300 cm/s
• Greatest Sensitivity: 3…100 cm/s

Gases:

• Setting Range: 200…3000 cm/s
• Greatest Sensitivity: 200…800 cm/s
• Switch Point Accuracy: ±2…10 cm/s (for water @ 25°C, factory setting)
• Repeatability: 1…5 cm/s
• Hysteresis: 2…5 cm/s
• Temperature Drift: 0.1 cm/s × 1/K
• Temperature Gradient Tolerance: 300 K/min
• Response Time: 1…10 s

Software / Programming

• Switch Point Adjustment: Via pushbutton
• Display Interface: 10 × three-colour LEDs

Environmental Conditions

• Ambient Temperature: –25 to +60°C
• Medium Temperature:
  • Normal: –25 to +95°C
  • SIP: up to +140°C
• Enclosure Rating: IP67 / IP69K
• Pressure Rating: 30 bar (3 MPa)
• MAWP (CRN applications): 30 bar
• MTTF: 298 years

Mechanical Design

• Weight: 440 g
• Dimensions: Ø 50 mm × 154 mm
• Housing Type: Cylindrical
• Housing Materials: Stainless steel (316L), PC, PBT-GF20, EPDM/X
• Wetted Materials: Stainless steel (316L), FKM

Compliance & Approvals

• EMC Standards:
  • DIN EN 61000-6-2
  • DIN EN 61000-6-3
• Shock Resistance: DIN EN 60068-2-27 (50 g / 11 ms)
• Vibration Resistance: DIN EN 60068-2-6 (10 g / 55…2000 Hz)

Key Features & Benefits:

✅ Extended Probe Length (55 mm): Ideal for deeper pipe immersion in hygienic systems.

✅ Fast & Reliable Flow Monitoring: Detects liquids and gases with high sensitivity.

✅ Pushbutton Configuration: Simplifies switch point adjustment without tools.

✅ High Temperature & Pressure Resilience: Operates up to 140°C and 30 bar.

✅ Hygienic Aseptoflex Connection: Minimises contamination risks in food processing.

✅ LED Feedback Display: 10-segment, three-colour LED for real-time status indication.

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