AHT-503H Outdoor Temperature & Humidity Transmitter

Industrial-Grade HVAC Monitoring for Semi-Outdoor & Exposed Environments

The AHT-503H Outdoor Mount model is purpose-built for monitoring temperature and humidity in semi-outdoor or partially exposed environments such as rooftops, building exteriors, plant sheds, and covered enclosures, common across commercial and industrial sites in Australia.

Featuring a sealed IP65 enclosure and high-reliability CMOSens® sensor, this model offers accurate environmental readings even in challenging conditions like rain, heat, and windblown dust. It’s a dependable choice for rooftop HVAC units, outdoor air intake systems, or smart ag-tech and facility monitoring solutions where weather resilience is critical.

Multiple signal outputs (4–20 mA, 0–10 V, RS-485 Modbus) allow seamless integration with local BMS systems and SCADA platforms used widely in Australian infrastructure projects.

Key Features

• Measures both Temperature and Relative Humidity (RH)
• Outdoor-ready housing for semi-exposed installations
• High-accuracy CMOSens® MEMS sensing element
• IP65-rated enclosure for protection against dust, splash, and outdoor airflow
• Maintenance-free for rooftop and ventilated zones
• 3 Switchable Temp Ranges: 0~50°C, -50~50°C or 0~100°C
  
• Multiple output options:
  ▸ Analog: 4–20 mA / 0–10 V / 0–5 V / 1–5 V
  ▸ Digital: Modbus RTU via RS-485
• Optional LCD display for real-time monitoring
• CE & FCC Certified
  

Applications

• Rooftop HVAC installations
• Semi-outdoor corridors or ventilation bays
• Loggias, awnings, and canopies
• Smart greenhouse & energy-efficient building systems
• Environmental sensing for large-scale infrastructure

Available Variants