A99BC-25C Johnson Controls Sensor

Overview

The Johnson Controls A99BC-25C is a passive Positive Temperature Coefficient (PTC) silicon temperature sensor designed for precise environmental monitoring in demanding HVAC and refrigeration systems. It comes equipped with a short, high-temperature silicone cable ideal for space-constrained installations and harsh operating environments.

Features

• High-accuracy PTC silicon sensing element providing fast and stable thermal readings.
• High-temperature silicone cable insulation designed to endure extreme heat.
• Compact 9.75-inch (0.25 m) lead length to reduce excess wiring.
• Durable stainless steel probe construction offering corrosion and moisture resistance.

Specifications

• Sensing Range: -40°F to 248°F (-40°C to 120°C)
• Reference Resistance: 1,035 ohms at 77°F (25°C)
• Accuracy: ±0.9°F (±0.5°C) between 5°F and 167°F (-15°C and 75°C)
• Cable Length: 9.75 inches (0.25 meters)
• Lead Wire Gauge: 22 AWG
• Compatibility: Designed for use with Johnson Controls/PENN System 450, A421, A419, and A350 temperature controllers.

Applications

• Temperature monitoring in walk-in coolers, reach-in cases, and freezers.
• Defrost termination temperature sensing.
• Condenser fan cycling control.
• Space, return air, and outdoor air sensing in commercial HVAC installations.