COMET T3418 – Temperature and Humidity Transmitter

COMET T3418 Indoor T+RH Transmitter RS485 

The COMET T3418 is an elegant and highly precise indoor transmitter for temperature and relative humidity, specifically designed for modern building automation and HVAC systems. With its flat light-grey design, it fits perfectly into any standard KU68 flush-mounted box and blends unobtrusively into offices, schools, hotels, hospitals, conference rooms, or residential buildings just like a light switch or thermostat.

The internal sensor measures temperature from –10 to +50 °C (±0.5 °C) and humidity from 5 to 95 %RH (±2.5 %RH in the main range), automatically calculating dew point, absolute humidity, specific humidity, mixing ratio, and specific enthalpy. Through the RS485 interface with Modbus RTU protocol, the T3418 can be seamlessly integrated into any BMS, SCADA, or smart home system.

Installation is extremely easy: simply clip it onto the existing flush-mounted box, connect power and RS485 and done. No drilling, no chiseling, no visible housing. Thanks to its slim design, the sensor protrudes only minimally from the wall.

Even at an affordable price, you get full COMET quality: durable, maintenance-free, three-year warranty, and long-term stability.

Why the COMET T3418 is the No. 1 choice for indoor climate monitoring:

• Perfect for KU68 flush-mounted boxes – looks like a light switch
• Precise temperature measurement –10 to +50 °C (±0.5 °C)
• Humidity 5–95 %RH (±2.5 %RH) with dew point calculation
• RS485 Modbus RTU factory-installed – fully compatible with BMS and automation
• Ultra-flat design – only about 10 mm protrusion from the wall
• Subtle light-grey design – fits any interior architecture
• Easy installation – no additional enclosure required
• Wide power supply 9–30 V DC – highly versatile
• IP20 protection for dry indoor areas
• 3-year warranty – proven COMET quality

Technical data:

• Temperature measuring range: –10 to +50 °C (±0.5 °C)
• Humidity: 5 to 95 %RH (±2.5 %RH in range 5–60 %RH)
• Dew point: –60 to +80 °C (±1.6 °C at T < 25 °C and RH > 30 %)
• Resolution: 0.1 °C / 0.1 %RH
• Sensor: internal
• Output: RS485
• Protocols: Modbus RTU, ARION, Advantech ADAM
• Temperature units: °C or °F selectable
• Power supply: 9–30 V DC
• Protection rating: IP20 (indoor use)
• Dimensions: 88 × 106 × 33 mm
• Weight: approx. 150 g
• Warranty: 3 years

Perfectly suited for:

• Office and administrative buildings
• Schools, kindergartens, lecture halls
• Hotels, hospitality, retail
• Hospitals and care facilities
• Residential buildings and smart homes
• Conference and meeting rooms
• Museums and exhibition spaces
• Building automation and energy management

Installation – done in less than 2 minutes

Open the flush-mounted box → clip on the T3418 → connect RS485 and power supply → done. No visible screws, no external housing, just a clean, professional finish.

Summary:

• Temperature and humidity transmitter
• For indoor environments
• Designed for demanding applications in building energy management and HVAC systems
• Simple installation into standard KU68 flush-mounted boxes for wall switches and sockets

Scope of delivery:

• T3418
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration