IFM PI2794 Pressure Sensor – PI-010-REA01-MFRKG/US/ /P

The IFM PI2794 is a compact and durable pressure sensor tailored for hygienic and food-grade applications. Featuring a flush G 1 Aseptoflex Vario process connection, ceramic measuring cell, and a measuring range from –1 to 10 bar, the PI2794 excels in systems handling liquids, gases, and viscous media with solids. With IO-Link communication, dual switching outputs, and a configurable 4–20 mA analog output, it integrates seamlessly into automation systems requiring precision, hygiene, and easy cleanability. Its IP69K stainless-steel design, LED indicators, and zero dead space construction make it ideal for CIP/SIP environments.

Technical Specifications

Model: PI2794
Sensor Type: Pressure Sensor
Pressure Type: Relative pressure & vacuum
Measuring Range: –1…10 bar | –14.5…145 psi | –0.1…1 MPa
Process Connection: G 1 Aseptoflex Vario, flush-mount
Application: Hygienic food/beverage processes, liquids with particles, CIP/SIP-compatible
Display: 4-digit alphanumeric with green/yellow status LEDs
No Dead Space: Yes
Special Features: Gold-plated contacts, long cycle durability

Electrical Characteristics

• 2-Wire Operation:
  • Voltage: 20–32 V DC
  • Current: 3.6–21 mA
  • Max Load: 300 Ω
  • Power-On Delay: 1 s
• 3-Wire Operation:
  • Voltage: 18–32 V DC
  • Current: < 45 mA
  • Switching Output Rating: 250 mA
  • Switching Frequency: 125 Hz
  • Voltage Drop: ≤ 2 V
  • Power-On Delay: 0.5 s
• Protection Class: III
• Reverse Polarity Protection: Yes
• Short-Circuit Protection: Yes (pulsed)
• Overload Protection: Yes
• Insulation Resistance: ≥ 100 MΩ @ 500 V DC
• Integrated Watchdog: Yes

Output Configuration

• Total Outputs: 2
• Output Types: Digital (PNP/NPN, NO/NC), Analog (4–20 mA), IO-Link
• Analog Output: Scalable and invertible
• Output Signal Format: Configurable via IO-Link

Measuring & Setting Ranges

• Measuring Range: –1…10 bar
• Set Point (SP): –0.98…10 bar
• Reset Point (rP): –1…9.98 bar
• Analog Start Point (ASP): –1…7.5 bar
• Analog End Point (AEP): 1.5…10 bar
• Factory Settings:
  • SP1 = 2.50 bar, RP1 = 2.30 bar
  • SP2 = 7.50 bar, RP2 = 7.30 bar
  • ASP = 0.00 bar, AEP = 10.00 bar
  • dAP = 0.06 s, dAA = 0.03 s

Accuracy & Deviations

• Switching Accuracy: < ±0.2% of span
• Repeatability: < ±0.1% of span
• Characteristic Deviation: < ±0.2%
• Linearity Deviation: < ±0.15%
• Hysteresis Deviation: < ±0.15%
• Long-Term Stability: < ±0.1% per year
• Temperature Coefficients:
  • Zero: < ±0.05% / 10 K
  • Span: < ±0.15% / 10 K

Response & Timing

• Min Response Time: 3 ms (3-wire)
• Switching Damping (dAP): 0…30 s
• Analog Damping (dAA): 0.01…99.99 s
• Process Cycle Time (IO-Link): Min. 2.3 ms

Interface & Communication

• IO-Link Version: 1.0
• Transmission Rate: COM2 (38.4 kBaud)
• SIO Mode: Supported
• Process Data: 1 analog, 2 binary
• Port Type Requirement: A

Environmental Conditions

• Ambient Temperature: –25 to +80 °C
• Medium Temperature: –25 to +125 °C (up to 145 °C for 1 hour)
• Storage Temperature: –40 to +100 °C
• Protection Ratings: IP67 / IP68 / IP69K
• Vacuum Resistance: –1000 mbar
• Pressure Rating: 50 bar (5 MPa)
• Burst Pressure: 150 bar (15 MPa)
• MAWP (CRN): 50 bar
• MTTF: 160 years

Compliance & Approvals

• EMC: DIN EN 61000-6-2 / DIN EN 61000-6-3
• Shock Resistance: 50 g (11 ms) – EN 60068-2-27
• Vibration Resistance: 20 g (10–2000 Hz) – EN 60068-2-6
• Factory Calibration Certificate: Available online

Mechanical Design

• Weight: 351.8 g
• Housing Dimensions: Ø 50 mm × 105.8 mm
• Materials:
  • Housing: 316L Stainless Steel, FKM, PTFE, PBT, PEI, PFA
  • Wetted Parts: 316L Stainless Steel (1.4435), Ceramic (99.9% Al₂O₃), PTFE
  • Surface Finish: Ra < 0.4 µm / Rz 4
• Min Pressure Cycles: ≥ 100 million

Display & Indicators

• LED Display: 4-digit alphanumeric
• Status LEDs:
  • Green: Operating
  • Yellow: Switching
• Units Displayed: Bar, psi, MPa, % of span

Electrical Connection

• Connector: 1 × M12 A-coded
• Contacts: Gold-plated

Key Features & Benefits

✅ –1 to 10 bar Measuring Range with vacuum resistance for wide application use.

✅ Flush G 1 Aseptoflex Design perfect for CIP/SIP food and beverage systems.

✅ Configurable Dual Outputs + IO-Link + 4–20 mA for versatile integration.

✅ LED Display + Status Indicators enable clear local diagnostics and setup.

✅ IP69K Hygienic Build + Gold-Plated Contacts ensures durability in washdown zones.

✅ 160-Year MTTF & Ceramic Cell delivers long-term accuracy and stability.

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