COMET T3311 – Temperature and Humidity Transmitter, Internal Sensors, RS232

COMET T3311 Temperature and Humidity Transmitter RS232      

The COMET T3311 is the classic and extremely robust temperature and humidity transmitter with internal sensors for versatile indoor and outdoor use. Thanks to its fully waterproof IP65 enclosure and 75 mm probe for optimal air circulation, it operates reliably for many years in production halls, warehouses, greenhouses, server rooms, on rooftops, or in building management systems – even at temperatures ranging from –30 to +80 °C.

The T3311 not only measures temperature (±0.4 °C) and relative humidity (±2.5 %RH) but also automatically calculates all essential derived parameters such as dew point, absolute humidity, specific humidity, mixing ratio, and specific enthalpy – directly accessible via the RS232 interface with Modbus RTU protocol (and Advantech ADAM compatibility).

The large dual-line LCD clearly displays current values and can be turned off during continuous operation to save power. Modern technology ensures outstanding long-term stability and automatic error detection.

Weighing only 150 g and featuring a compact design, the T3311 can be mounted quickly anywhere – the proven all-rounder for precise climate measurement.

Why the COMET T3311 is the bestseller for T+RH measurement:

• Internal sensors in 75 mm probe – optimal air circulation
• Completely waterproof IP65 – truly suitable for outdoor use
• RS232 Modbus RTU – easy integration into automation systems
• All humidity parameters integrated – dew point directly available
• Large dual-line display – switchable
• Extremely durable – computer-calibrated accuracy
• Wide power supply range 9–30 V DC
• Automatic error detection
• Lightweight – only 150 g
• 3-year warranty

Technical data:

• Temperature range: –30 to +80 °C (±0.4 °C)
• Relative humidity: 0 to 100 %RH (±2.5 %RH from 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
• Sensors: internal, located in the probe
• Output: RS232
• Protocols: Modbus RTU, Advantech ADAM
• Temperature units: switchable °C / °F
• Power supply: 9–30 V DC
• Protection rating: IP65 (electronics), IP40 (sensors)
• Dimensions: 88.5 × 170 × 39.5 mm, probe length 75 mm
• Weight: approx. 150 g
• Warranty: 3 years

Perfect for:

• Building and hall climate monitoring
• Warehouses, cold storage, server rooms
• Greenhouses and agriculture
• Heating, ventilation, and air conditioning systems (HVAC)
• Meteorological stations
• Production halls and machinery rooms
• Control cabinets and technical rooms
• Smart building and energy monitoring

Installation – ready in minutes

Mount to the wall with two screws, connect power and RS232 – done. The T3311 is immediately ready for operation. Measurement units and communication settings can be configured easily via the free TSensor software.

Summary:

• Ambient temperature and relative humidity transmitter
• Suitable for both indoor and outdoor applications
• Integrated sensors for relative humidity and temperature. Measured values are also converted into other humidity units: dew point temperature, absolute humidity, specific humidity, mixing ratio, and specific enthalpy.

Scope of delivery:

• T3311
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration