Liquid Flow Switch, Paddle, NEMA 4 Enclosure, Model F61SB-9100 | Johnson Controls

The Johnson Controls F61SB-9100 is a high-performance flow switch designed to monitor the movement of liquids in pipes and protect critical equipment like pumps and chillers from dry running. It uses a sensitive paddle mechanism that actuates a precision internal microswitch when flow rates change. Its NEMA 4 enclosure ensures protection against water and dust, allowing installation in damp machine rooms and demanding industrial environments. Available in 1" thread size.

Applications

• Pump protection against dry running in water circulation systems
• Flow monitoring in chiller and cooling tower systems
• Flow control in HVAC and industrial air conditioning systems
• Protection of heat exchangers and process equipment
• Flow detection in fire sprinkler systems
• Automation of pumping systems in the food and pharmaceutical industry

Technical Specifications

• Model: F61SB-9100
• Type: Paddle Flow Switch for Liquids
• Thread Size: 1"
• Enclosure: NEMA 4 (water and dust resistant)
• Mechanism: Sensitive paddle with precision internal microswitch
• Application: Protection of pumps, chillers, and circulation systems
• Design: Simplified mechanical, long service life
• Manufacturer: Johnson Controls
• Country of Origin: United States

Other Common Names

• Johnson Controls F61SB-9100 flow switch
• Johnson Controls NEMA 4 paddle flow switch
• Johnson Controls 1 inch pipe flow switch
• F61SB Johnson Controls liquid flow detector
• Johnson Controls HVAC pump flow switch
• F61SB 1" NPT liquid flow detector