HE-69435NS-0 Johnson Controls Humidity Element

Overview

The Johnson Controls HE-69435NS-0 is a surface-mount duct humidity and temperature sensor designed to provide precise environmental monitoring inside HVAC ducts and rooftop economizers. It combines both relative humidity and temperature sensing into a single, compact unit to save installation time and reduce system costs. Housed in a durable all-plastic enclosure, this sensor is engineered to withstand duct environments while delivering accurate data to building automation systems, helping to optimize indoor air quality and enable energy-efficient economization strategies.

Features

• Dual Sensing Capabilities: Integrates relative humidity and temperature monitoring into a single device, eliminating the need for separate sensors.
• High-Quality Enclosure: Features a compact, all-plastic housing designed specifically for mounting inside ducts and rooftop unit applications or retrofits.
• Protective Membrane: Equipped with a built-in protective membrane that shields the internal sensors from environmental contamination.
• Quick Installation: Designed with a surface-mount configuration that allows for a fast and simple two-screw installation process.
• Certified Performance: Tested and calibrated using equipment certified to comply with National Institute of Standards and Technology (NIST) guidelines.

Specifications

• Humidity Accuracy: ±3% relative humidity (RH) across the full range of 0% to 100% RH.
• Humidity Output Signal: 0 to 5 VDC proportional output.
• Temperature Sensor Type: 2.252k ohm NTC thermistor.
• Temperature Accuracy: ±0.36°F (±0.2°C) at a reference temperature of 77°F (25°C).
• Power Requirements: 14 to 30 VDC or 20 to 30 VAC at 50/60 Hz, Class 2.
• Current Draw: 3 mA with no load; 25 mA maximum.
• Ambient Operating Conditions: 32 to 140°F (0 to 60°C); 0 to 100% RH with an 85°F (29.4°C) maximum dew point.
• Acceptable Wire Gauge: 16 to 24 AWG wire (18 AWG recommended).
• Enclosure Materials: All-plastic plenum-rated material complying with UL flammability standards.

Applications

• Economizer Control: Ideal for use with direct-mount economizer controllers to calculate enthalpy and drive energy-efficient rooftop strategies.
• Indoor Air Quality (IAQ) Monitoring: Used to measure and track duct humidity levels against ASHRAE ventilation standards to ensure comfortable building conditions.
• Commercial HVAC Systems: Suitable for supply, return, or exhaust air monitoring in commercial building automation networks.