Trane BAYSENS037A Sensor

The Trane BAYSENS037A is a precision duct mount humidity with temp sensor engineered for seamless integration into ReliaTel and Symbio 700 control systems. This field-installed accessory utilizes a high-grade polymer capacitive sensing element to deliver a critical 3% relative humidity accuracy within a 20% to 95% RH range. For temperature monitoring, it features a reliable 10 kOhm Type II thermistor, consolidating two essential environmental data points into a single enclosure to streamline installation and reduce wiring overhead. Designed for professional HVACR applications, the unit operates efficiently between -20°F and 140°F and outputs a standard 4 to 20 mA signal via a two-position connection block. Contractors should note that 18-gauge shielded twisted pair wiring is recommended to ensure signal integrity and prevent electromagnetic interference across the analog input. This OEM Trane sensor (replaces SEN01178 and X13790445010) is essential for maintaining strict indoor air quality (IAQ) setpoints and optimizing building automation performance.

• Dual-Function Sensing: Measures both humidity and temperature in a single duct-mounted housing, reducing the number of penetrations and installation steps.
• High Stability: Features a low drift rate of less than 1% per year, ensuring long-term measurement consistency without frequent field recalibration.
• Enhanced IAQ Control: Precise 3% accuracy allows for tighter control of dehumidification and humidification cycles in commercial air handling systems.
• Direct OEM Compatibility: Specifically engineered for Trane equipment using Symbio or ReliaTel platforms, facilitating plug-and-play communication for space humidity active diagnostics.

Is the BAYSENS037A compatible with existing ReliaTel boards?
Yes, it connects directly to the RTOM (Reliatel Options Module) at terminals 18 and 19. Ensure the unit is configured for a space humidity sensor via the controller interface to enable active reading.

What type of wiring is required for this sensor?
It is recommended to use 18-gauge shielded twisted pair—equivalent to Trane "Purple Wire" (Part # 400 2028)—to mitigate noise on the analog signal path.

Can this sensor be used for outdoor air humidity monitoring?
This specific model is designed for duct mounting in return or supply air streams. For ambient outdoor air monitoring, a dedicated outdoor-rated sensor with a protective sun shield should be specified instead.

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.