Johnson Controls A19ADB-38C Remote Bulb Temperature Controller SPST 100-240°F

The Johnson Controls A19ADB-38C is a remote bulb temperature controller designed for precise temperature monitoring and control in HVAC, refrigeration, and industrial applications. This single-pole, single-throw (SPST) controller opens on temperature rise, providing reliable high-limit protection within a temperature range of 100-240°F.

Key Features:

• Remote bulb sensor with 3/8" diameter x 4" length bulb dimensions
• 6-foot capillary tube for flexible installation and remote sensing
• SPST switch configuration opens circuit on rising temperature
• Manual reset operation ensures deliberate acknowledgment before restart
• Adjustable setpoint range from 100°F to 240°F
• Durable construction suitable for commercial and industrial environments

The manual reset feature makes this controller ideal for safety-critical applications where automatic reset could mask underlying issues. The remote bulb design allows temperature sensing in locations separate from the controller mounting position, providing installation flexibility in tight spaces or where direct mounting is impractical.