COMET T7418 – Temperature, Humidity, and Barometric Pressure Transmitter

COMET T7418 Indoor T+RH+Pressure Transmitter RS485  

The COMET T7418 is an elegant and highly precise indoor transmitter for the simultaneous measurement of temperature, relative humidity, and barometric pressure, 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 integrates 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), humidity from 5 to 95 %RH (±2.5 %RH in the main range), and barometric pressure from 600 to 1100 hPa (±1.3 hPa). The device automatically calculates dew point, absolute humidity, specific humidity, mixing ratio, and specific enthalpy. Through the RS485 interface with Modbus RTU protocol, the T7418 can be seamlessly integrated into any BMS, SCADA, or smart home system.

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

Despite its affordable price, you get full COMET quality: durable, maintenance-free, with a 3-year warranty and long-term stability.

Why COMET T7418 is the No. 1 choice for indoor climate monitoring:

• Perfect for KU68 flush-mounted boxes – looks like a light switch
• Three measured values: temperature + humidity + barometric pressure
• Dew point and all humidity parameters integrated
• RS485 Modbus RTU (factory set) – fully compatible with BMS and automation systems
• Ultra-flat design – only about 10 mm protrusion from the wall
• Discreet light-grey design – fits any architecture
• Very easy installation – no additional enclosures required
• Wide power supply range 9–30 V DC – flexible application
• IP20 protection for dry indoor environments
• 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 within 5–60 %RH range)
• Barometric pressure: 600 to 1100 hPa (±1.3 hPa at 23 °C, 800–1100 hPa)
• Dew point: –60 to +80 °C (±1.6 °C at T < 25 °C and RH > 30 %)
• Resolution: 0.1 °C / 0.1 %RH / 0.1 hPa
• Sensor: internal
• Output: RS485
• Protocols: Modbus RTU, ARION, Advantech ADAM
• Temperature units: °C or °F selectable
• Pressure units: hPa, kPa, mbar, mmHg, inHg, inH₂O, PSI, oz/in²
• Power supply: 9–30 V DC
• Protection rating: IP20 (indoor use)
• Warranty: 3 years

Perfectly suited for:

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

Installation – done in under 2 minutes

Open the flush-mounted box → clip in the T7418 → connect RS485 and power supply → finished. No visible screws, no additional housing – just a clean and professional installation.

Summary:

• Transmitter for ambient temperature, humidity, and air pressure
• For indoor use, e.g., environmental monitoring
• For demanding applications in building energy management and HVAC systems
• Simple installation in standard KU68 flush-mounted boxes for wall switches and sockets

Scope of delivery:

• T7418
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration