Johnson Controls A19ADB-38C

Johnson Controls A19ADB-38C is a remote bulb temperature controller engineered for precise, automatic protection in heating and cooling systems. This SPST Open High thermostat uses a remote bulb sensor with a 100–240°F switching range and a manual reset for safe restart after a trip.

Designed for easy integration, the A19ADB-38C offers flexible placement with its 3/8" x 4" bulb probe and a 6-foot cap lead, delivering reliable monitoring in compact control panels. Built by Johnson Controls for demanding environments, this temperature controller combines durable components with straightforward service, helping minimize downtime and maintain process stability.

• Configuration: Remote bulb temperature controller
• Switching action: SPST Open High
• Temperature range: 100–240°F
• Reset: Manual reset
• Probe size: 3/8" x 4"
• Cap length: 6 ft

Ideal for HVAC, industrial equipment, or process control, the A19ADB-38C provides dependable protection with easy field replacement and compatibility with standard wiring practices.

Whether you're upgrading legacy control panels or integrating into new equipment, the A19ADB-38C's compact form factor and standard mounting make replacement straightforward. The remote sensing approach minimizes measurement noise and provides accurate trip points, ensuring consistent process control and safety in critical environments.