The Aaon OE250 Outside Air Temperature Sensor is a critical component for achieving precise HVAC head pressure control and economizer logic in Aaon rooftop units. Engineered to interface directly with Aaon VCM-X controller systems, this 10k Type III thermistor provides the high-accuracy ambient data necessary for occupied/unoccupied cooling sequences and frost protection. Designed with a weather-resistant housing, the OE250 mitigates thermal drift, ensuring reliable ambient temperature sensing in demanding exterior environments. Contractors frequently utilize this sensor for HVAC system optimization and ensuring proper air-side economizer operation. Whether you are performing a field replacement or a system upgrade, this sensor ensures the building automation system receives clean, linear signals for efficient load management. Precision calibration minimizes cycling, extending the operational life of the compressor and ensuring the mechanical cooling system reacts correctly to shifting outdoor conditions. Universal Aaon Compatibility: Designed specifically for seamless integration with Aaon OE250 series controls and VCM-X modules. High-Precision Thermistor: Features a 10k ohm Type 3 curve to provide accurate remote temperature monitoring across extreme ranges. Rugged Enclosure: Built to withstand UV exposure and moisture, preventing signal degradation in outdoor HVAC installations. Simplified Wiring: Standard two-wire termination allows for rapid field installation and replacement on existing RTU control boards. Common Technical Questions What resistance curve does the OE250 utilize?The sensor uses a standard 10k Type III thermistor curve, calibrated for high-accuracy environmental sensor data collection. Can this sensor be used for water temperature sensing?No, the OE250 is specifically an air temperature sensor; submerged applications require a dedicated immersion well probe. Where is the optimal mounting location for this sensor?For accurate outside air temperature readings, mount the sensor on the north side of the unit or within the intake hood to avoid solar gain interference. 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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