Automation Components Inc (ACI) A/CP-O-EH Thermistor

The ACI A/CP-O-EH is a precision 10K Type II thermistor designed specifically for outside air temperature monitoring in commercial building automation systems. This sensor features a 10K Ohm resistance at 77°F (25°C), providing accurate feedback for economizer control and HVAC sequencing. Built with a rugged European-style enclosure, the unit utilizes a gasketed cover and a watertight NEMA 4X rated fitting to prevent moisture ingress and internal corrosion. This model is functionally identical to the ACI/10K-CP-O, ensuring seamless integration into existing BAS and DDC networking environments. The flush-mount configuration is engineered for exterior wall installation, typically placed on the North side of structures to minimize solar gain interference. Technicians will find this ambient air temperature sensor reliable for harsh environments where industrial-grade weatherproof HVAC sensors are required to maintain tight deadbands and peak system efficiency.

• NEMA 4X Protection: The gasketed European enclosure ensures the sensing element is protected from rain, ice, and wind-driven debris.
• High Compatibility: Standard 10K Ohm Type II curve matches most industry-standard controllers from major manufacturers.
• Moisture Resistance: Integrated watertight fittings prevent thermistor drift caused by humidity or condensation within the housing.
• Flush Mount Design: Low-profile installation reduces the risk of mechanical damage while maintaining thermal coupling with ambient air conditions.

How do I wire the A/CP-O-EH to my controller?
This is a non-polar, two-wire passive thermistor sensor. For best results, use shielded twisted pair wire to reduce electromagnetic interference (EMI) on long cable runs.

Can this sensor be used for temperature compensation?
Yes, the 10K-CP series is frequently used for outdoor air reset schedules and chiller/boiler optimization based on real-time outside air temperature.

Is this sensor compatible with my 10K Type III system?
No, the Type II thermistor has a different resistance curve than Type III. Ensure your controller is programmed for 10K Type 2 to avoid significant temperature offsets.

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.