Schneider Electric Duct Humidity Sensor 24 VAC HED3VST Series

The Schneider HED3VST Series Duct Humidity Sensor is a specialized device designed for monitoring and controlling humidity levels in ventilation ducts and HVAC (Heating, Ventilation, and Air Conditioning) systems. These sensors play a crucial role in maintaining indoor air quality and ensuring occupant comfort by providing accurate humidity measurements and facilitating automated control of ventilation equipment. Here are the key features and functionalities of the HED3VST Series:

1. Humidity Sensing: The HED3VST Series sensor is equipped with a humidity sensor element that measures relative humidity (RH) levels in the air passing through the ventilation duct. This sensor provides accurate and reliable humidity measurements, allowing for precise control of indoor humidity levels.

2. Duct Mounting: Designed for installation directly into ventilation ducts, the HED3VST Series sensor is mounted internally to monitor the humidity of the air circulating within the ductwork. This placement ensures that the sensor captures representative air samples and provides accurate readings of the overall duct humidity.

3. 24 VAC Power Supply: The HED3VST Series sensor operates on a 24 VAC (Volts Alternating Current) power supply, making it compatible with standard HVAC control systems and power sources commonly found in commercial and industrial buildings.

4. Analog Output: These sensors typically feature analog output signals, such as 0-10 VDC (Volts Direct Current) or 4-20 mA (milliamps), proportional to the measured humidity levels. These output signals can be interfaced with building automation systems (BAS) or HVAC controllers for real-time monitoring and control of humidity levels.

5. Adjustable Setpoints: The HED3VST Series sensor may include adjustable setpoints or thresholds for humidity levels, allowing users to define desired humidity ranges and trigger actions based on deviations from these setpoints. This enables automated control of ventilation equipment, humidifiers, or dehumidifiers to maintain optimal indoor conditions.

6. Onboard Temperature Sensor (Optional): Some models of the HED3VST Series sensor may feature an onboard temperature sensor in addition to the humidity sensor. This temperature sensor provides simultaneous monitoring of air temperature, allowing for integrated control of both temperature and humidity in HVAC systems.

7. Robust Construction: Schneider Electric designs the HED3VST Series sensor with a rugged and durable construction suitable for installation in industrial environments. The sensor is engineered to withstand the temperature and humidity conditions typically encountered in ventilation ducts.

Applications:

The Schneider HED3VST Series Duct Humidity Sensor is used in various HVAC and building automation applications, including:

• Commercial and industrial ventilation systems
• HVAC control in office buildings, hospitals, schools, and manufacturing facilities
• Cleanroom environments requiring precise humidity control
• Energy management systems aiming to optimize HVAC performance and energy efficiency

Conclusion:

The Schneider HED3VST Series Duct Humidity Sensor provides accurate and reliable monitoring of humidity levels in ventilation ducts, enabling precise control of indoor air quality and occupant comfort. With features such as duct mounting, 24 VAC power supply, analog output, adjustable setpoints, and robust construction, these sensors are essential components in HVAC systems, contributing to improved indoor air quality, energy efficiency, and overall building comfort.