A/TT100-D-12"-4 Series | Duct RTD Temperature Transmitter | 100Ω PT100 | 4–20 mA | 12" Probe

Precision RTD Temperature Monitoring for Ducted HVAC Systems

The A/TT100-D Series is a high-accuracy duct temperature transmitter designed for air handling units, rooftop HVAC systems, and mixed or return air duct monitoring. Each unit uses a platinum 100Ω RTD (PT100) sensor and delivers a reliable 4–20 mA loop-powered output, ensuring compatibility with BMS/BAS platforms.

Factory-calibrated to DIN EN 60751 Class A accuracy and equipped with a rugged 12" (30.48cm) 304 stainless steel probe, these transmitters offer excellent stability and fast response. Choose from four enclosure options (NEMA 1, 3R, 4X, or plenum-rated) to match your site’s environmental conditions.

Key Features

• Sensor Type: 100Ω Platinum RTD (PT100), DIN EN 60751 Class A
• Output Signal: 4–20 mA (2-wire loop-powered)
• Accuracy: ±0.06% RTD | ±0.2% Calibrated (<260°C spans)
• Probe: 12" Stainless Steel, ¼" diameter
• Response Time: 8 seconds (63% step)
• Power Supply: 8.5–32 VDC
• Thermal Drift: ≤ ±0.04%/°F for <100°F spans
• Certifications: RoHS2, WEEE
• Warranty: 5-Year Limited Warranty

Applications

• Rooftop Units (RTUs)
• Supply / Return / Mixed Air Monitoring
• AHUs & VAV Boxes
• Building Management Systems (BMS)
• Commercial HVAC Control
• Energy Platforms & Monitoring Systems

Models

Note: Need a different size? Simply click the ‘Make an Enquiry’ button above to request a custom quote.

• Datasheet
• PB Factsheet
• BB Factsheet
• GD Factsheet
• 4X Factsheet