The Honeywell Duct Sensors Range provides high-precision duct temperature and relative humidity monitoring engineered specifically for commercial air handling units (AHUs), ventilation ducts, variable air volume (VAV) loops, and cleanroom air systems.

High-Accuracy HVAC Airflow Tracking with the Honeywell Duct Sensors Range

Designed to deliver consistent environmental data for energy-efficient climate control, the Honeywell Duct Sensors Range captures real-time temperature gradients and humidity levels inside primary ventilation distribution ducts. By pairing fast-responding capacitive humidity cells with high-stability thermal sensing elements, the sensors ensure tight tracking of supply, return, and outdoor air conditions without signal oscillation or excessive calibration drift.

The product series accommodates universal building automation architectures, offering configurable active 0–10 V DC or 4–20 mA current loop outputs alongside standard passive thermistor and RTD options (including NTC 20k, Pt100, and Pt1000). The rugged insertion probe is fitted with a specialized sintered filter or radiation shield to protect the sensitive electronic measuring cell from high air velocities, suspended dust particles, and mechanical moisture mist within turbulent air streams.

The weatherproof electrical termination head features tool-free hinged or screw-down access, clear internal terminal labeling, and adaptable conduit knockouts to streamline mechanical and electrical commissioning across central plant infrastructure.

Key Features and Engineering Advantages

• Dual-Parameter Sensing: Combines dry-bulb temperature and relative humidity monitoring into a single duct penetration to minimize installation labor and sheet metal drilling.
• Long-Term Stability: Capacitive polymer humidity elements feature integrated temperature compensation to resist sensor saturation and chemical air contamination.
• Universal Control Interoperability: Compatible with all major Direct Digital Control (DDC) and Building Management System (BMS) field panels via standardized voltage, current, or resistance signals.
• Adjustable Immersion Depth: Includes an adjustable slide-locking duct flange to center the sensing tip directly within the core laminar airflow path.
• Protective Field Enclosure: Industrial ABS/polycarbonate housing rated IP54/IP65 shields terminal connections against mechanical impact, condensation, and ambient washdown moisture.

Technical Specifications

Industrial Applications and Process Integration

The Honeywell Duct Sensors Range provides vital environmental data across commercial and industrial infrastructure, including:

• Commercial air handling units (AHUs), rooftop packaged units, and primary intake economizer control loops.
• Return air enthalpy balancing and demand-controlled building ventilation circuits.
• Pharmaceutical manufacturing cleanrooms, clean corridors, and positive pressure laboratory spaces.
• Data center hot/cold aisle thermal containment and computer room air conditioning (CRAC) monitoring.

Frequently Asked Questions

What is the recommended installation method for duct temperature and humidity probes?
The probe should be installed in a straight duct section at least three duct diameters downstream from bends, dampers, coils, or mixing boxes to avoid turbulence and stratified thermal layers. Use the supplied mounting flange and neoprene gasket to ensure an airtight seal against duct air leakage.

Can the Honeywell Duct Sensors Range interface with non-Honeywell DDC controllers?
Yes. Units configured with standard 0–10 V DC, 4–20 mA, or standard Pt100/Pt1000 RTD resistance curves wire directly into analog inputs on third-party automation systems including Siemens, Schneider Electric, Johnson Controls, and Delta Controls.

How does the protective filter cap shield the humidity sensor?
A micro-porous membrane or sintered filter cap on the tip of the probe permits free water vapor diffusion while blocking airborne dust, particulates, and water droplets from directly contacting the capacitive sensing grid.