SKU: SENS-0590
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Sensirion SFM3400-33-AW Digital Flow Sensor, 33 L/min, 1.1 Bar, 5.25V, I2C Interface

₹21,759.00 (Inclusive of all taxes)
Out of Stock

The Sensirion SFM3400-33-AW is a high-precision digital flow sensor designed for demanding medical and laboratory applications, offering bidirectional flow measurement up to ±33 slm. It features an I2C digital interface for easy integration with microcontrollers (Arduino, Raspberry Pi, ESP32) and industrial PLCs, providing fast, temperature-compensated readings for non-aggressive gases.

Features

  • Bidirectional flow measurement up to ±33 standard liters per minute (slm).
  • Ultra-fast 0.5 ms response time with 14-bit digital resolution.
  • Medical-grade ISO5356-1 connectors and autoclavable (AW) PPSU/MABS enclosure.
  • Integrated digital temperature compensation for stable, accurate readings.
  • I2C digital interface with a default address of 0x40 (400 kHz max).

Out of stock

Description

The Sensirion SFM3400-33-AW utilizes a sophisticated thermal flow sensing principle to deliver precise, bidirectional gas flow measurement. Its digital signal processing provides inherent temperature compensation, ensuring accuracy across its 0°C to 50°C operating range. The sensor is engineered for minimal interference with low dead space (<1 ml) and is resistant to ESD up to 8 kV contact discharge.

Designed for integration into critical systems, the SFM3400-33-AW is ideal for applications requiring fast, reliable data. Its robust medical-grade construction and autoclavable design make it suitable for repeated use in controlled environments. The I2C interface simplifies communication with a wide range of host controllers and data acquisition systems.

Key Features

  • High-Precision Digital Flow Meter: Provides accurate bidirectional measurement with 14-bit resolution for critical gas flow monitoring.
  • Medical-Grade Durability: Features an autoclavable PPSU/MABS enclosure with ISO5356-1 connectors for reliable performance in sterile environments.
  • Ultra-Fast Dynamic Response: 0.5 ms update time enables real-time flow tracking for dynamic processes and ventilation control.
  • Integrated Signal Conditioning: Onboard digital temperature compensation ensures stable output independent of ambient temperature fluctuations.
  • Standard Digital Interface: I2C communication (default address 0x40) allows for straightforward daisy-chaining and microcontroller integration.
  • Optimized for Medical Use: Low dead space (<1 ml) minimizes flow path interference, making it ideal for neonatal and paediatric respiratory applications.
  • Robust Electrical Protection: Rated for 8 kV ESD contact discharge, enhancing system reliability.
  • Compact, Lightweight Form Factor: Measures 70mm x 20mm and weighs only 20g for easy integration into space-constrained designs.

Applications

  • Neonatal and paediatric mechanical ventilation systems.
  • Medical diagnostic equipment and spirometers.
  • Laboratory gas mixing and analysis instruments.
  • Precision gas dosing and flow control in pharmaceutical manufacturing.
  • Anaesthesia machine and respiratory therapy device monitoring.

Technical Specifications

Manufacturer Part NumberSFM3400-33-AW
Sensor TypeDigital Flow Sensor
Flow Range±33 slm (Standard Liters per Minute)
Operating Voltage5V ±5% (5.25V max)
Current Consumption<10 mA
Maximum Pressure1.1 Bar
Response Time0.5 ms
InterfaceI²C (max 400 kHz), default address 0x40
Operating Temperature0°C to 50°C
Enclosure MaterialPPSU/MABS (Autoclavable AW version)
Connector StandardISO5356-1 (Medical Grade)
ESD Protection8 kV Contact Discharge
Dimensions (L x W)70 mm x 20 mm
Weight20 g

Frequently Asked Questions

What is the operating voltage range for the SFM3400-33-AW sensor?

The sensor operates at a nominal 5V DC with a tolerance of ±5%. The maximum recommended supply voltage is 5.25V. It is designed for stable 5V logic systems commonly found in medical and laboratory equipment.

How do I communicate with this sensor using the I2C interface?

The sensor uses a standard I2C interface with a maximum clock frequency of 400 kHz. Its default 7-bit I2C address is 0x40 (CubePilot). You can read flow data and sensor status by sending the appropriate command codes as detailed in the Sensirion datasheet.

Is this sensor suitable for use with oxygen or other medical gases?

Yes, the SFM3400-33-AW is designed for use with non-aggressive, non-condensing gases, including oxygen mixtures used in medical applications. Its medical-grade ISO5356-1 connectors and autoclavable PPSU/MABS enclosure make it suitable for sterile environments. Always verify material compatibility for your specific gas.

What is the difference between the 'AW' and 'D' versions of the SFM3400?

The 'AW' suffix denotes the autoclavable, reusable version with a PPSU/MABS enclosure, designed for repeated sterilization. The 'D' version is a disposable, single-use sensor. The AW model is intended for applications where the sensor is a permanent part of the equipment and requires cleaning.

Package Includes

  • 1 x Sensirion SFM3400-33-AW Digital Flow Sensor

Additional Information

Weight 0.02 kg
Dimensions 7 × 2 cm