Henry Group Industries S-9424A Liquid Level Switch 24V AC/DC 1/2" NPT

The Henry Group Industries S-9424A is an electronic liquid level switch designed for precise monitoring and control of liquid levels in commercial refrigeration and air conditioning systems. This versatile switch operates on 24V AC/DC power and features a 1/2" NPT threaded connection for secure installation.

Key Features:

• Advanced optical sensor technology using infrared light and a fused glass prism for reliable liquid detection
• Normally open contact configuration - switches when liquid is absent
• 0.5 amp relay output with flying lead connections (orange and white/stripe wires)
• Maximum working pressure of 1200 PSI with burst pressure rating of 6000 PSI
• Replaceable relay module for extended service life
• Compact design with robust construction for durability

Applications:

• Liquid receivers
• Suction line accumulators
• Compressor crankcases

Compatible with HCFC, HFC, and ammonia refrigerants along with their associated oils. The optical sensing technology eliminates moving parts, providing reliable performance even in demanding commercial refrigeration environments. When no liquid covers the glass prism, infrared light reflects back to the receiver, triggering the switch. When liquid is present, light disperses into the fluid, causing the switch to change state.

Installation Note: Switch must be installed horizontally to prevent liquid trapping. Ensure no objects are within 50mm of the glass prism for proper operation.