COMET T3313 – Duct Transmitter for Humidity and Temperature, 150 mm Probe, RS232

COMET T3313 Duct Humidity + Temperature RS232 

The COMET T3313 is the proven professional duct transmitter for high-precision measurement of temperature and relative humidity directly in the air stream of ventilation, air-conditioning, and process ducts. The 150 mm stainless-steel probe with protective filter extends deep into the duct, ensuring representative measurement values even at high air velocities and temperatures up to +125 °C.

This makes the T3313 ideal for HVAC systems, supply and exhaust ducts, drying processes, production halls, greenhouses, data centers, and anywhere accurate climate data from the duct are needed for control, monitoring, or energy optimization.

In addition to temperature and humidity, it also provides all key derived parameters directly: dew point, absolute humidity, specific humidity, mixing ratio, and specific enthalpy – without additional calculation. The RS232 interface with Modbus RTU protocol (and Advantech ADAM compatibility) allows effortless integration into control and monitoring systems.

The fully IP65-rated housing, large dual-line display (switchable), and COMET’s legendary long-term stability have made the T3313 a standard in professional ventilation technology for many years.

Why the COMET T3313 is the first choice for duct measurement:

• 150 mm duct probe – optimal position in the air stream
• Temperature range up to +125 °C – also suitable for warm-air ducts
• Full IP65 protection – resistant to condensation and dust
• RS232 Modbus RTU – easy to integrate into automation
• All humidity parameters integrated – dew point available directly
• Large dual-line display – easy to read, switchable
• Highest accuracy – Temp. ±0.4 °C | Humidity ±2.5 %RH
• Fast response time thanks to stainless-steel mesh filter
• Easy duct mounting – via flange or clamp
• 3-year warranty – verified COMET quality

Technical data:

• Temperature range: –30 to +125 °C (±0.4 °C)
• Relative humidity: 0 to 100 %RH (±2.5 %RH within 5–95 % at 23 °C)
• Dew point: –60 to +80 °C (±1.5 °C for T < 25 °C and RH > 30 %)
• Resolution: 0.1 °C / 0.1 %RH
• Duct probe: 150 mm stainless steel with protective filter
• Communication: RS232, Modbus RTU (standard), Advantech ADAM
• Power supply: 9–30 V DC
• Protection class: IP65 (electronics), IP40 (sensors)
• Dimensions: 88.5 × 250 × 39.5 mm
• Weight: approx. 150 g
• Warranty: 3 years

Perfect for:

• Ventilation and air-conditioning systems (HVAC)
• Supply and exhaust air ducts
• Drying systems and warm air processes
• Production and storage halls
• Greenhouses and agricultural technology
• Data centers and technical rooms
• Pharmaceutical and food production
• Energy optimization and EnEV compliance

Installation – quick and safe

Drill a 25 mm hole into the duct, insert the probe, fix it with a flange or clamp, connect the cable – ready for operation in just minutes. The electronics remain protected outside the duct.

Summary:

Humidity and temperature transmitter for indoor and outdoor use, designed for duct installation. Sensors for relative humidity and temperature (150 mm probe). Measured values are also converted into other humidity parameters: dew point temperature, absolute humidity, specific humidity, mixing ratio, and specific enthalpy.

Scope of delivery:

• T3313
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration