The ACS FLUXICONT FS4 is a high-precision electronic flow and temperature switch designed for monitoring, control, and continuous measurement of liquids. Based on the calorimetric (thermal dispersion) principle, it has no moving parts, ensuring long-term reliability and maintenance-free operation in demanding industrial environments. The device integrates flow and temperature sensing in a single compact unit, providing both switching outputs and a 4-20 mA analog signal for flow rate.

Key Features & Technical Specifications

• Wide Flow & Temperature Range: Detects flow velocities from 3 to 300 cm/s, process temperatures from -20°C to +110°C, and withstands pressures up to 40 bar (up to 50 bar for FS4LK hygienic version).
• Flexible Power & Output Options: Available in DC version (10.5…35 VDC) with 2x PNP switching outputs and 4…20 mA analog output, or Universal Voltage version (20…253 VAC/DC) with 1x relay changer output.
• High Performance: Flow step response time ≤ 6 seconds, temperature step response time ≤ 4 seconds. Flow accuracy: ≤ ±5% of measured value (5…100 cm/s), ≤ ±10% of measured value (100…175 cm/s). Temperature accuracy: ≤ ±1.5K.
• Robust & Hygienic Design: All wetted parts are stainless steel V4A (1.4571/1.4404) with FPM seals. The FS4LK hygienic version features elastomer-free, dead-space-free metallic sealing, conforming to EHEDG/3A/FDA standards, and supports CIP/SIP cleaning.
• User-Friendly Interface: Equipped with a high-brightness LED display, 3-key tactile feedback operation, and rotatable enclosure for optimal readability in any installation position. Menu navigation follows VDMA standards.
• High Environmental Protection: Rated IP65/IP67, with a wide ambient temperature range of -20°C to +85°C (extended to -40°C to +85°C for FS4LK). Resistant to extreme shock, vibration, and aggressive media.
• Extensive Process Connections: Available with ISO 228-1 thread, ANSI NPT thread, ISO 225-1 M18x1.5 adapter thread, Tri-Clamp®, Dairy coupling DIN 11851, Varivent®, and flanges to DIN/ISO.
• Certifications & Customization: Optional factory calibration with certificate, EN10204 3.1 material test certificate, LABS-free/silicone-free versions, and customer-specific configurations (software adaption, terminal assignment, labeling).

Applications

The FLUXICONT FS4 is ideal for a wide range of industrial applications, including:

• Cooling water circuit monitoring for pumps, turbines, compressors, heat exchangers, and temperature control units.
• Pump dry-run protection and leak monitoring in process lines.
• Lubrication system and filter monitoring.
• Beverage industry media flow monitoring.
• Hygienic applications in food and beverage, pharmaceutical, and biotechnology industries (FS4LK version).
• General plant, apparatus, and mechanical engineering.