Automation Components Inc (ACI) A/20K-D-12-BB Thermistor

The Automation Components Inc (ACI) A/20K-D-12-BB Thermistor is a high-precision duct temperature sensor engineered specifically for HVAC Building Automation and light industrial systems. This model features a 20K Ohm NTC sensor that provides exceptional accuracy (±0.2°C) for critical climate control applications, including zone control and air handling unit monitoring. The 12-inch 304 stainless steel probe is designed for deep penetration into airflows, ensuring the tip reaches the center of the duct for representative readings. To ensure long-term reliability, the sensing element is double encapsulated with thermally conductive epoxy, preventing moisture infiltration and sensor failure in high-humidity or condensing environments. This industrial-grade HVAC thermistor is housed in a rugged aluminum metal bell box (BB) with a NEMA 3R rating, making it suitable for wet and demanding outdoor or indoor installations. With a built-in mounting flange and non-polarity sensitive 22 AWG etched Teflon lead wires, this duct mount sensor is an essential component for high-performance BAS temperature monitoring.

Key Benefits:

• Superior Moisture Protection: The double encapsulated sensor design eliminates common failure points caused by water ingress in wet HVAC environments.
• Rugged Durability: Features an aluminum bell box and stainless steel probe that meet NEMA 3R standards for environmental protection.
• High Accuracy: The 20,000 Ohm thermistor ensures precise temperature feedback (±0.36°F) for optimized energy management and comfort.
• Versatile Application: Ideal for supply, return, and mixed air temperature sensing in air handling units and light industrial processes.

Common Questions:

• What is the resistance at standard temperature? This NTC thermistor provides a nominal resistance of 20,000 Ohms at 77°F (25°C).
• Is this sensor suitable for outdoor use? Yes, the NEMA 3R enclosure and moisture-resistant encapsulation make it suitable for wet environments and outdoor ducts.
• What size hole is required for installation? The 0.250-inch diameter probe typically requires a 3/8-inch mounting hole for proper insertion.

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.

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