Bard HVAC 8403-038 Humidity Control

The Bard HVAC 8403-038 is a professional-grade non-electric humidity control specifically designed for industrial HVAC systems and wall-mount units. This SPDT humidity controller features a wide 125°F maximum ambient temperature rating and a relative humidity range of 20% to 80% RH. Built for precise humidity regulation, it operates with a nonadjustable 5% nominal differential, ensuring stable moisture levels for sensitive equipment and critical processes. The unit is housed in a durable silver bronze chassis and is designed for vertical mounting on a standard 2x4 inch junction box, facilitating seamless HVAC control integration in heavy-duty environments.

Key Benefits:

• Compatible with a wide range of Bard wall-mount HVAC units for reliable latent load management.
• Features SPDT switching for versatile control of both humidification and dehumidification equipment.
• Engineered for industrial environments with a robust construction that withstands high-temperature conditions.
• Ensures optimal equipment protection by preventing excessive moisture buildup or extreme dryness.

Common Questions:

How do I calibrate the Bard 8403-038 humidity controller?
This mechanical controller is factory-calibrated; however, technicians can verify the setpoint against a calibrated hygrometer to ensure the 5% nominal differential is maintaining the desired relative humidity range.

Is the Bard 8403-038 compatible with digital HVAC interfaces?
The 8403-038 is a non-electric mechanical humidistat. For applications requiring digital communication or remote monitoring, consider upgrading to the Bard 8403-100 digital series.

Can this unit control both a humidifier and a dehumidifier simultaneously?
Yes, the SPDT (Single Pole Double Throw) contact configuration allows the controller to trigger either a humidification or dehumidification cycle depending on the specific wiring and RH setpoint.

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.