Automation Components Inc (ACI) A/AN-I-4-PB Thermistor

The ACI A/AN-I-4-PB is a high-precision 10K Type II Thermistor designed specifically for immersion temperature monitoring in HVAC Building Automation Systems. This immersion temperature sensor features a 4-inch probe and a 1/2" NPT male thread, making it ideal for monitoring chiller hot water systems, tanks, and boilers. To ensure long-term reliability, the sensing element is double encapsulated, providing superior protection against moisture infiltration. The unit is housed in a durable plastic box (PB) enclosure rated up to 203°F and utilizes etched Teflon lead wires for enhanced chemical resistance. Whether you are searching for an ACI 10K Ohm thermistor or the identical ACI/10K-AN-I-4, this sensor offers a negative temperature coefficient (NTC) for accurate thermal feedback. The tool-less latch system allows for quick access, simplifying installation and maintenance in light industrial applications. Please note that thermowells must be ordered separately, and machined wells are recommended for high-velocity fluid environments.

Key Benefits

• Moisture Resistance: Double encapsulated sensing element prevents failures caused by condensation or moisture ingress.
• Broad Compatibility: Standard 10K Ohm Type II resistance curve integrates seamlessly with most HVAC controllers.
• Easy Installation: The plastic box enclosure features an easy open/close latch system, eliminating the need for screws during wiring.
• Durability: Etched Teflon lead wires provide excellent thermal stability and resistance to environmental stress.
• Versatile Application: Perfect for boiler temperature monitoring and liquid storage tanks.

Common Questions

What is the difference between a welded and machined thermowell for this sensor?
Welded thermowells are suitable for static or low-flow applications. However, for moving water or high-pressure service, machined thermowells must be used to prevent failure caused by fluid velocity and wake frequency.

Can this sensor be used in steam applications?
The PB enclosure is rated for a maximum temperature of 203°F (95°C), so it should only be used in hot water or fluid applications within that thermal range.

Does this include the thermowell?
No, thermowells are sold separately. You must select the appropriate well based on your system's pressure and flow requirements.

This item is not eligible for free shipping.

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.