Johnson Controls A19ZBA-1 Temperature Control 30-80°F 6' Capillary SPST Open Low

The Johnson Controls A19ZBA-1 is a single-stage remote bulb temperature control designed for precise temperature regulation in heating, cooling, and refrigeration applications. This control uses a liquid-filled sensing element and capillary system that provides accurate, repeatable performance unaffected by barometric pressure or cross-ambient temperature variations.

Key Features:

• Temperature range: 30°F to 80°F, ideal for chiller, tank, and refrigeration applications
• 6-foot capillary length with remote sensing bulb for flexible installation
• SPST (Single Pole Single Throw) switch with open low action for automatic cooling control
• Tank adapter included for secure mounting in liquid immersion applications
• Liquid-filled sensing element provides precision repeat accuracy
• Line voltage switching capability: 24 to 277 VAC
• Compact NEMA 1 enclosure for versatile mounting options
• Adjustable differential for precise temperature control

The A19 Series controls are built for durability in commercial and industrial environments including water chillers, refrigeration systems, storage tanks, and HVAC applications. The remote bulb design allows the control to be mounted away from the sensing point, while the tank adapter ensures proper bulb positioning in liquid applications. This control opens on temperature drop and is commonly used in cooling and chiller systems where reliable temperature monitoring is critical.