Carrier 33ZCSENOAT Air Sensor

The Carrier 33ZCSENOAT Outdoor Air Sensor is a critical component for high-performance HVAC system integration, specifically engineered for the Carrier Comfort Network (CCN) and i-Vu building automation platforms. As a 10K Type II thermistor, this sensor provides precise ambient temperature monitoring with an accuracy of +/- 0.36°F (+/- 0.2°C) between 32°F and 158°F. Housed in a durable, weather-resistant NEMA 4 / IP66 rated bell box enclosure, it is designed to withstand harsh environmental conditions while delivering real-time data to the controller for economizer cooling, heating lockouts, and optimal airside management.

For professional installation, this non-communicating sensor should be mounted on the northern exterior of the building or within the outdoor air duct upstream from the damper to avoid solar gain interference. The 33ZCSENOAT utilizes a 2-wire passive NTC thermal resistor setup, ensuring seamless compatibility with packaged outdoor units and commercial split systems. Field technicians can verify sensor integrity by measuring a resistance of 10k Ohms at 77°F, allowing for rapid diagnosis of calibration drift or wiring faults that could otherwise trigger system efficiency losses.

• Precise 10K Type II Thermistor: Delivers high-accuracy ambient data for superior economizer control and energy-efficient staging.
• Rugged Bell Box Enclosure: NEMA 4 and IP66 rated housing protects internal components from UV, rain, and debris.
• Wide Operating Range: Sustains accurate readings across temperatures from -40°F to 302°F, suitable for all climate zones.
• Standard CCN Integration: Designed for direct interface with Carrier Comfort Network and i-Vu BAS controllers.
• Simplified Maintenance: Features a standard resistance curve for fast field testing and troubleshooting.

Where is the best location to mount the 33ZCSENOAT for the most accurate readings?
To prevent false high readings from solar radiation, technicians should mount the sensor on the north side of the building, at least four feet above the ground and one foot below the eave. If used in a duct, ensure it is upstream from the outdoor air damper.

What resistance should I see when testing the sensor with a multimeter?
This is a 10K Ohm Type 2 sensor. At a reference temperature of 77°F (25°C), the resistance should measure 10,000 Ohms. Readings significantly higher or lower indicate a faulty thermistor or a short in the 22AWG lead wires.

Can this sensor be used with non-Carrier control systems?
While optimized for Carrier CCN and i-Vu systems, the 33ZCSENOAT is a standard 10K Type II thermistor and may be compatible with other building automation systems that support this specific resistance curve.

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.