The EGE SC 440 series is a thermodynamic (calorimetric) flow switch designed for reliable flow monitoring of liquid media. Operating on the thermal principle, the sensor is heated internally a few degrees above the medium temperature. As the medium flows, heat is conducted away, cooling the sensor. The measured temperature difference is directly proportional to the flow velocity, enabling precise flow/no-flow detection without any moving parts. This eliminates failure due to corroded bearings, torn impellers, or deflector deformation, ensuring long-term reliability even in harsh industrial environments.

Key Features

• No Moving Parts: The thermodynamic measuring principle eliminates mechanical wear, providing maintenance-free operation and long service life.
• Wide Detection Range: Adjustable detection range from 1-150 cm/s for water and 3-300 cm/s for oil, suitable for diverse liquid media.
• High Pressure Rating: Rated for up to 100 bar, making it suitable for high-pressure hydraulic and industrial systems.
• Robust Construction: Fully stainless steel housing (AISI 316Ti) provides corrosion resistance and durability in aggressive environments.
• Visual Flow Indication: Integrated LED array provides clear local indication of flow status for easy monitoring and troubleshooting.
• IP67 Protection: Dust-tight and protected against temporary immersion, suitable for demanding industrial conditions.
• Flexible Installation: Available with G1/4, G1/2, and NPT connections, with various sensor lengths (25mm to 120mm) to accommodate different pipe sizes.
• Easy Configuration: Switching point adjustable via potentiometer directly on the device, eliminating the need for external programming tools.

Technical Specifications

• Available Models: SC440-A4-GSP (standard), SC440/1-A4-GSP (G1/2, 48mm probe), SC440/2-A4-GSP, SC440/3-A4-GSP, SC440/5-A4-GSP, SC440/6-A4-GSP (NPT1/2)
• Sensor Length: Standard 31 mm; optional 25, 48, 80, 120, 40 mm (depending on model)
• Power Supply: 24 V DC ±20%
• Current Consumption: < 70 mA
• Switching Current: Max 400 mA (at 20°C)
• Response Time: 1 to 15 seconds (adjustable)
• Start-up Time: 2 to 15 seconds typical
• Temperature Gradient: Max 250 K/min
• Medium Temperature: -20°C to +80°C
• Ambient Temperature: -20°C to +80°C
• Storage Temperature: -40°C to +85°C
• Sensor Material: AISI 316Ti stainless steel
• Housing Material: AISI 316Ti / AISI 303 stainless steel
• Electrical Connection: M12 plug connector (4-pin)
• Dimensions (standard): 70 mm (length) x 30 mm (diameter) approx.
• Weight: Approx. 200 g

Applications

The SC 440 series is widely used in industrial applications requiring reliable liquid flow monitoring:

• Cooling water monitoring for welding machinery, injection molding machines, and industrial processes
• Cooling lubricant flow control in machining centers and metal processing (rolling mills, wire drawing)
• Pump dry-run protection to prevent pump damage
• Filter monitoring to detect clogging and schedule maintenance
• CIP/SIP processes in food and pharmaceutical industries
• Monitoring of process flows in chemical plants and water treatment facilities
• Hydraulic oil flow monitoring in industrial machinery