The part number A19ABC-9037 is a Johnson Controls A19 Series Duct-Mounting Thermostat. It is a mechanical temperature control device designed for HVAC applications, particularly in ventilation systems, refrigeration, and heating.

Specification & Description of A19ABC-9037

• Manufacturer/Brand: Johnson Controls (PENN Controls series)
• Part Type: Duct-Mounting Thermostat
• Switch Type: SPDT (Single-Pole, Double-Throw) snap-acting switch
• Temperature Range: Typically -30°F to 550°F (-34°C to 288°C) depending on model configuration
• Differential: Adjustable (varies by application)
• Capillary/Bulb: Remote bulb or duct-mounted sensing element for accurate air temperature measurement
• Enclosure: NEMA-rated housing for durability in industrial/commercial environments
• Operation:
  • Mechanical thermostat using a liquid-filled sensing bulb and capillary.
  • Provides snap-acting switching when the setpoint is reached.
  • Requires no external power (purely mechanical).