
EWC Controls OAS Sensor
The EWC Controls OAS Sensor is a critical 10k ohm thermistor designed for real-time outdoor air temperature monitoring in zoned HVAC applications. Engineeerd for seamless integration with EWC Ultra-Zone systems, this outdoor air sensor provides the essential data required for automatic changeover in dual-fuel heat pump setups and multi-stage heating systems. By replacing bulky mechanical thermostats, the OASEWC enables precise control of supplemental or backup heat based on actual ambient conditions, ensuring the HVAC zone control system operates at peak efficiency.
This versatile component is constructed with UV-stabilized polycarbonate and a seamless aluminum tube to provide a robust thermal barrier against duct or wall heat transfer. It is fully compatible with EWC BMPlus, UZC4, and UT3000 series control panels and comes as a standard component for economizer system installations. For a reliable field install, use a dedicated 2-conductor 18AWG solid copper thermostat cable. The sensor is non-polarity sensitive, simplifying the wiring process at the designated terminal block on the Ultra-Zone control panel.
Key Benefits
- Precision Temperature Accuracy: Delivers a consistent 10.5K ohm resistance at 75°F for reliable environmental data.
- System Optimization: Automatically manages dual-fuel changeover and multi-stage heating without external kits.
- Flexible Installation: Designed for either exterior wall or air duct mounting to suit specific job site requirements.
- Rugged Reliability: UV-stabilized housing protects internal 24AWG leads and the thermistor from harsh weather conditions.
- Universal Compatibility: Works across the a wide range of EWC Ultra-Zone panels, including the BMPlus and UT3000 series.
Common Questions
Which control panels are compatible with the OASEWC?
The sensor is designed specifically for EWC Controls systems, including the BMPlus series, UZC4 series, and UT3000 panels. It is also a standard part of the HK2000 Economizer gear.
What type of wire should be used for the run?
Contractors should use a dedicated 2-conductor 18AWG solid copper jacketed thermostat cable. Avoid running this in parallel with line voltage circuits or exceeding 100 feet to prevent signal interference.
How do I verify if the sensor is functioning correctly?
You can test the sensor with a multimeter set to ohms. At 75°F (room temperature), the sensor should read approximately 10,500 ohms. Always disconnect the leads from the panel before testing for accurate resistance values.
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.
Original: $36.32
-65%$36.32
$12.71EWC Controls OAS Sensor
The EWC Controls OAS Sensor is a critical 10k ohm thermistor designed for real-time outdoor air temperature monitoring in zoned HVAC applications. Engineeerd for seamless integration with EWC Ultra-Zone systems, this outdoor air sensor provides the essential data required for automatic changeover in dual-fuel heat pump setups and multi-stage heating systems. By replacing bulky mechanical thermostats, the OASEWC enables precise control of supplemental or backup heat based on actual ambient conditions, ensuring the HVAC zone control system operates at peak efficiency.
This versatile component is constructed with UV-stabilized polycarbonate and a seamless aluminum tube to provide a robust thermal barrier against duct or wall heat transfer. It is fully compatible with EWC BMPlus, UZC4, and UT3000 series control panels and comes as a standard component for economizer system installations. For a reliable field install, use a dedicated 2-conductor 18AWG solid copper thermostat cable. The sensor is non-polarity sensitive, simplifying the wiring process at the designated terminal block on the Ultra-Zone control panel.
Key Benefits
- Precision Temperature Accuracy: Delivers a consistent 10.5K ohm resistance at 75°F for reliable environmental data.
- System Optimization: Automatically manages dual-fuel changeover and multi-stage heating without external kits.
- Flexible Installation: Designed for either exterior wall or air duct mounting to suit specific job site requirements.
- Rugged Reliability: UV-stabilized housing protects internal 24AWG leads and the thermistor from harsh weather conditions.
- Universal Compatibility: Works across the a wide range of EWC Ultra-Zone panels, including the BMPlus and UT3000 series.
Common Questions
Which control panels are compatible with the OASEWC?
The sensor is designed specifically for EWC Controls systems, including the BMPlus series, UZC4 series, and UT3000 panels. It is also a standard part of the HK2000 Economizer gear.
What type of wire should be used for the run?
Contractors should use a dedicated 2-conductor 18AWG solid copper jacketed thermostat cable. Avoid running this in parallel with line voltage circuits or exceeding 100 feet to prevent signal interference.
How do I verify if the sensor is functioning correctly?
You can test the sensor with a multimeter set to ohms. At 75°F (room temperature), the sensor should read approximately 10,500 ohms. Always disconnect the leads from the panel before testing for accurate resistance values.
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.
Product Information
Product Information
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Description
The EWC Controls OAS Sensor is a critical 10k ohm thermistor designed for real-time outdoor air temperature monitoring in zoned HVAC applications. Engineeerd for seamless integration with EWC Ultra-Zone systems, this outdoor air sensor provides the essential data required for automatic changeover in dual-fuel heat pump setups and multi-stage heating systems. By replacing bulky mechanical thermostats, the OASEWC enables precise control of supplemental or backup heat based on actual ambient conditions, ensuring the HVAC zone control system operates at peak efficiency.
This versatile component is constructed with UV-stabilized polycarbonate and a seamless aluminum tube to provide a robust thermal barrier against duct or wall heat transfer. It is fully compatible with EWC BMPlus, UZC4, and UT3000 series control panels and comes as a standard component for economizer system installations. For a reliable field install, use a dedicated 2-conductor 18AWG solid copper thermostat cable. The sensor is non-polarity sensitive, simplifying the wiring process at the designated terminal block on the Ultra-Zone control panel.
Key Benefits
- Precision Temperature Accuracy: Delivers a consistent 10.5K ohm resistance at 75°F for reliable environmental data.
- System Optimization: Automatically manages dual-fuel changeover and multi-stage heating without external kits.
- Flexible Installation: Designed for either exterior wall or air duct mounting to suit specific job site requirements.
- Rugged Reliability: UV-stabilized housing protects internal 24AWG leads and the thermistor from harsh weather conditions.
- Universal Compatibility: Works across the a wide range of EWC Ultra-Zone panels, including the BMPlus and UT3000 series.
Common Questions
Which control panels are compatible with the OASEWC?
The sensor is designed specifically for EWC Controls systems, including the BMPlus series, UZC4 series, and UT3000 panels. It is also a standard part of the HK2000 Economizer gear.
What type of wire should be used for the run?
Contractors should use a dedicated 2-conductor 18AWG solid copper jacketed thermostat cable. Avoid running this in parallel with line voltage circuits or exceeding 100 feet to prevent signal interference.
How do I verify if the sensor is functioning correctly?
You can test the sensor with a multimeter set to ohms. At 75°F (room temperature), the sensor should read approximately 10,500 ohms. Always disconnect the leads from the panel before testing for accurate resistance values.
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.











