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The WattMaster OE265-16-G (AAON ASM01838) is a vertical-mount EBUS outdoor air temperature and relative humidity sensor engineered for precision environmental monitoring in commercial HVAC systems. This dual-function sensor provides accurate real-time measurement of outdoor air conditions via the EBUS digital communication protocol, enabling seamless integration with AAON rooftop units and compatible building automation systems. The vertical mounting configuration optimizes airflow exposure while protecting sensing elements from direct precipitation, ensuring reliable data for economizer control, outdoor air reset, and energy management strategies.
| Brand | Part Number | Cross-Reference | Measurement Type | Communication Protocol | Mounting |
|---|---|---|---|---|---|
| WattMaster | OE265-16-G | AAON ASM01838 | Temperature & RH | EBUS Digital | Vertical |
Designed for outdoor air monitoring in AAON rooftop units (RTUs), air handling units (AHUs), and building management systems (BMS) requiring precise environmental data. The EBUS digital protocol enables direct communication with AAON factory controls and compatible DDC systems for real-time data logging, trend analysis, and advanced HVAC control strategies. Common applications include economizer optimization, demand-controlled ventilation (DCV), outdoor air reset sequences, dehumidification control, and energy management. The vertical mounting orientation ensures optimal sensor exposure while minimizing moisture accumulation and ice formation on sensing elements.
EBUS digital communication eliminates analog signal drift and provides superior accuracy and noise immunity over long cable runs. Weatherproof construction protects temperature and humidity sensing elements from moisture, UV exposure, and temperature extremes, ensuring long-term stability in demanding outdoor environments. Engineered to AAON specifications for direct compatibility with factory controls and seamless integration with aftermarket BAS platforms. The vertical mounting design enhances drainage and reduces maintenance requirements compared to horizontal sensors, delivering consistent performance across thousands of thermal and humidity cycles.