Johnson Controls A99BB-600 Temperature Sensor

The Johnson Controls A99BB-600 is a high-precision PTC silicon temperature sensor engineered for demanding HVACR applications, offering an exact 1:1 replacement for the A99BB-600C model. This 1000 ohm temperature sensor features a negative temperature coefficient (PTC) design that ensures linear resistance output across its entire -40 to 212?F temperature range. Designed for versatility, this sensor is a staple for HVAC controllers and refrigeration monitoring systems, providing the reliability required for walk-in coolers, boilers, and AHU discharge air monitoring. The A99BB-600 sensor facilitates seamless integration with System 450 controls and other Johnson Controls A99 series kompatible hardware. Encased in a rugged 0.25-inch stainless steel probe with a 19.5-foot PVC cable, it provides high moisture resistance and thermal stability, ensuring accurate HVAC sensor readings even in high-humidity environments. Professional contractors rely on this sensor for its consistent calibration and ease of field installation.

• Linear Resistance Response: The PTC silicon sensor element provides predictable resistance changes, reducing the need for frequent recalibration.
• Extended Connectivity: Equipped with a 19.5-foot PVC cable, allowing for flexible mounting positions without signal degradation.
• Broad Operating Range: Rated for extremes between -40?F and 212?F, making it suitable for both cryogenic and heating applications.
• Standardized Housing: Features a 1/4-inch diameter probe that fits standard thermowells and mounting clips for rapid deployment.
• Proven Compatibility: Fully interchangeable with the A99BB-600C, simplifying inventory and replacement part sourcing.

Is the A99BB-600 compatible with System 450 controls?
Yes, this sensor is specifically designed for the Johnson Controls System 450 and other digital electronic controllers that require a 1000-ohm PTC input.

Can the 19.5-foot lead wire be extended?
While the A99BB-600 comes with a factory 19.5-foot cable, it can be extended using standard 22 AWG twisted pair wire; however, contractors should account for lead wire resistance in high-precision setups.

How does this model differ from the A99BB-600C?
Technically, there is no difference in performance or physical specifications; the A99BB-600 and A99BB-600C are identical components and can be used interchangeably in all technical applications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.