Industrietechnik SF1 Series Liquid Flow Switch | Electromechanical | Brass | IP65 | HVAC & Process Applications

Robust Liquid Flow Detection for Industrial Piping Systems

The SF1 Series by Industrietechnik features a line of high-reliability electromechanical flow switches designed to detect and monitor liquid flow in industrial and HVAC pipe systems. These switches serve as critical components in applications where flow verification is essential for system safety, efficiency, or automation.

Built for tough environments, the SF1K, SF1E, and SF1RE models are crafted with brass housings (or optionally stainless steel AISI 316L for aggressive media), and are ideal for systems like refrigeration circuits, air conditioning lines, water pumps, and heat exchangers.

Each model is equipped with a high-contact rating and a threaded R1" male connection for easy integration into pipelines. Their IP65-rated enclosure, wide operating temperature range, and CE compliance make them a dependable solution for flow assurance across diverse industrial installations.

Key Features

• Electromechanical paddle-type flow switch with no power supply required
• Setpoint Ranges:
  • SF1K / SF1E: 0.6 to 165.7 m³/h
  • SF1RE: 0.2 to 90.1 m³/h (low-flow detection)
• Maximum Flow Rate: Up to 240 m³/h
• High-pressure tolerance: Rated up to 1100 kPa
• Contact Rating: 15 (8) A @ 24–250 VAC
• Threaded R1" Male Connection for standard pipelines
• IP65 Enclosure with transparent polycarbonate (PC) cover
• Ambient Operating Range: -40°C to +85°C / 10–90% RH
• Materials: Brass body with ABS base (optional stainless steel version)
• CE Compliant / Class I Appliance

Applications

• HVAC Systems: Flow monitoring in chilled/hot water loops, air handlers, and fan coil units
• Refrigeration: Verifying coolant flow in compressors and evaporator lines
• Heat Pumps: Monitoring flow through exchangers and safety systems
• Industrial Piping: General-purpose flow verification in automated process lines
• Pump Protection: Dry run prevention and system startup verification
• Cooling Towers & Boilers: Ensuring adequate fluid circulation
• Water Distribution & Irrigation: Detecting flow presence in closed-loop systems

Models:

Downloads:

• Datasheet