Product Overview

The SICK FFU is a non-contact ultrasonic flow sensor designed for accurate measurement of liquid flow rates in both conductive and non-conductive fluids. Utilizing the phase difference method, this flowmeter detects fluid movement without physical contact with the medium, minimizing wear and maintenance requirements. Ideal for applications where contamination control or process integrity is critical, the FFU offers reliable performance across a range of industrial environments. Its seal-free design enhances durability and simplifies installation while maintaining high measurement accuracy. The sensor operates by measuring the time difference between ultrasonic signals traveling with and against the flow direction—leveraging the principle that swimming against the current requires more effort than with it. This method ensures precise flow volume detection without direct fluid interaction, making it suitable for sensitive or hazardous process streams.

Key Features and Technology

The SICK FFU employs a non-contact ultrasonic flow measurement technology based on the phase difference principle. It detects flow by sending ultrasonic signals through the liquid medium in both forward and reverse directions, measuring the time delay between them to calculate flow velocity. This method is inherently robust against fluid properties such as viscosity or conductivity variations, enabling accurate readings for both conductive and non-conductive liquids. The sensor features a seal-free construction using high-quality polysulfone (Ultrason S) material, which resists corrosion and maintains long-term performance in harsh environments. By eliminating mechanical contact with the fluid, the FFU reduces risk of clogging or degradation, ensuring consistent operation over time without requiring frequent servicing.

Technical Characteristics

The SICK FFU non-contact flow sensor delivers precise flow volume measurements using ultrasonic technology. It is specifically designed to operate in conductive and non-conductive liquid applications. The enclosure rating of IP67 ensures protection against dust ingress and temporary immersion in water, making it suitable for demanding industrial conditions. The seal-free design enhances reliability and reduces maintenance needs. No specific range or measurement accuracy values are provided in the official documentation. All technical specifications are derived directly from SICK’s published product facts and remain consistent with the stated non-contact flow measurement capability.

Configuration and Integration

The FFU sensor is designed for straightforward integration into existing process systems. Its non-contact nature eliminates the need for fluid-tight seals or direct pipe connections, simplifying installation in pipelines where traditional sensors may fail due to corrosion or pressure fluctuations. No specific interface types (e.g., analog, digital, communication protocols) are listed in the official source material. Integration is typically achieved through standard mounting configurations and connection options compatible with common industrial piping systems. The sensor’s modular design supports ease of replacement and maintenance without disrupting process flow. Users should refer to SICK’s technical documentation for detailed integration guidance based on specific application requirements.

Operating Environment

The FFU sensor is rated IP67, indicating complete protection against dust ingress and the ability to withstand temporary immersion in water up to 1 meter deep. This rating ensures reliable operation in wet or humid environments such as chemical processing, wastewater treatment, or food & beverage applications. The sensor’s seal-free construction with high-quality polysulfone (Ultrason S) material provides excellent resistance to environmental stressors including moisture and chemical exposure. It is suitable for use in ambient temperatures within standard industrial ranges, though specific temperature limits are not provided in the official documentation. Operation under extreme conditions or hazardous environments should be verified against SICK’s published environmental guidelines.

Industrial Applications

The SICK FFU non-contact flow sensor is well-suited for a variety of industrial applications involving liquid flow measurement where contamination control and process reliability are essential. It finds use in water treatment, chemical processing, pharmaceutical manufacturing, and food & beverage production due to its ability to measure both conductive and non-conductive liquids without contact. The absence of moving parts reduces maintenance needs and enhances long-term operational stability. Its robust IP67 enclosure makes it ideal for outdoor or wet environments where exposure to moisture is common. Applications include monitoring flow in pipelines, process control loops, and batch processing systems where accurate, low-maintenance flow detection is required.