Field Instruments

Product Overview

The Festo SFAH-0.1U-Q4S-PNLK-PNVBA-L1 is a compact, ultra-sensitive thermal flow sensor engineered for precise monitoring of very low air and nitrogen flow rates in pneumatic systems. It combines high measurement accuracy, robust design, and digital communication for advanced industrial automation and energy management applications.

This model features QS4 (4 mm) push-in pneumatic connections, dual switching outputs, analogue output, and IO-Link® communication, enabling both local indication and integration into modern control systems. The two-colour illuminated LCD display provides instant visibility of flow readings and status alerts, ensuring optimal monitoring and control.

Key Features

• Ultra-Low Flow Capability: Measures flow rates from 0.002 L/min to 0.1 L/min with high accuracy.
• Bidirectional Measurement: Monitors flow in both directions for greater flexibility.
• Thermal Mass Flow Principle: Ensures highly stable and repeatable results with minimal pressure loss.
• Dual Output Configuration:
  • 2× Switch outputs (PNP/NPN)
  • 1× Analogue output (0–10 V / 4–20 mA / 1–5 V selectable)
• IO-Link® V1.1 Communication: Enables parameter setting, real-time diagnostics, and digital process data exchange.
• Two-Colour Display (Red/Green): Provides visual feedback for normal operation or alarm status.
• Compact Design with QS4 Connection: Easy integration into pneumatic control systems using 4 mm push-in fittings.
• Energy-Efficient Operation: Low current draw with built-in short-circuit and reverse-polarity protection.
• Cleanroom Compatible: ISO 14644-1 Class 4 certified for use in sensitive or sterile environments.
• Durable Build: Reinforced PA housing and stainless-steel wetted parts ensure long service life.

Technical Specifications

• Manufacturer: Festo SE & Co. KG
• Model: SFAH-0.1U-Q4S-PNLK-PNVBA-L1
• Part Number: 8058461
• Measured Variable: Mass / Volumetric flow rate
• Measuring Principle: Thermal (heat-transfer)
• Flow Measuring Range: 0.002 L/min to 0.1 L/min
• Flow Direction: Bidirectional
• Medium: Compressed air (ISO 8573-1 [6:4:4]) or Nitrogen
• Operating Pressure: –0.9 bar to 10 bar
• Media Temperature: 0 °C to 50 °C
• Ambient Temperature: 0 °C to 50 °C
• Accuracy: ± (2 % of measured value + 1 % FS)
• Repeatability: ± 0.2 % FS (zero), ± 0.8 % FS (span)
• Temperature Coefficient: 0.15 % FS/K
• Pressure Influence: 1 % FS/bar
• Outputs:
  • 2 × Switching outputs (PNP/NPN selectable)
  • 1 × Analogue output (0–10 V / 4–20 mA / 1–5 V)
• Communication Interface: IO-Link® V1.1 / COM2 (38.4 kBd) / Smart Sensor Profile
• Electrical Connection: M8×1 A-coded plug (4-pin)
• Operating Voltage: 22 V DC … 26 V DC
• Current Consumption: ≤ 25 mA (no load)
• Display: Two-colour illuminated LCD (red/green)
• Pneumatic Connection: QS4 (4 mm push-in)
• Housing Material: Reinforced Polyamide (PA)
• Wetted Materials: Silicone, Silicon Nitride, Stainless Steel (1.4301)
• Protection Class: IP40
• Corrosion Resistance Class (CRC): 2 (Moderate)
• Cleanroom Class: ISO 14644-1 Class 4
• Pressure Drop: < 5 mbar
• Weight: Approx. 90 g
• Compliance: CE, UKCA, UL Listed, RCM, RoHS

Applications

• Leak detection in pneumatic and nitrogen systems.
• Air consumption monitoring for energy-saving programs.
• Flow verification in small pneumatic control circuits.
• Cleanroom flow measurement in laboratory and semiconductor manufacturing.
• Predictive maintenance for industrial automation systems.
• OEM integration in air monitoring, testing, and diagnostics equipment.

Why Buy from FieldInstruments.lk?

At FieldInstruments.lk, Sri Lanka’s trusted supplier of Festo automation and instrumentation solutions, we provide genuine Festo products backed by technical expertise and dependable service.

Our Advantages:

• Genuine Festo products with manufacturer warranty
• Competitive pricing and fast island-wide delivery
• Local technical support and application consultation
• Reliable after-sales service and calibration assistance

The Festo SFAH-0.1U-Q4S-PNLK-PNVBA-L1 is the ideal choice for engineers and system designers who require ultra-precise, low-flow measurement with digital connectivity and robust construction.

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Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk