COMET T5441 – CO₂ Transmitter with External Probe

COMET T5441 CO₂ Transmitter External Probe RS485 

The COMET T5441 is a robust CO₂ concentration transmitter with a remote external probe (1 m cable) – specifically designed for use in demanding, aggressive, or hard-to-reach environments. The electronics remain protected while the probe can be placed precisely where measurements are needed – in humid rooms, dusty halls, corrosive areas, shafts, tanks, or production facilities.

With its extended measuring range up to 10,000 ppm, the T5441 is ideal for high CO₂ concentrations – for example in greenhouses, breweries, biogas plants, warehouses, or industrial processes. The 3-color LED indicator (green/yellow/red) immediately displays air quality: Green ≤1000 ppm, Yellow 1001–1200 ppm, Red ≥1201 ppm.

The maintenance-free NDIR sensor with automatic calibration ensures years of accurate operation. Through the RS485 interface with Modbus RTU protocol, the T5441 can be seamlessly integrated into any building automation, ventilation control, or SCADA system. The fully IP65-protected housing withstands even harsh environmental conditions.

Whether for air quality monitoring in difficult environments or process control with high CO₂ levels – the T5441 is the flexible and reliable solution.

Why the COMET T5441 is the best choice for external CO₂ measurement:

• External probe with 1 m cable – electronics safely housed
• Extended range up to 10,000 ppm – suitable for high concentrations
• 3-color LED indicator – instantly visible air quality
• RS485 Modbus RTU (factory-installed) – ideal for automation
• Maintenance-free thanks to automatic calibration
• Fully IP65 protected – suitable for humid and dusty environments
• Wide operating temperature range –30 to +80 °C
• Rugged housing – only 250 g
• Easy installation – mount electronics on the wall, place the probe flexibly
• 3-year warranty

Technical data:

• CO₂ measuring range: 0 to 10,000 ppm
• CO₂ accuracy: ±(100 ppm + 5% of measured value) at 25 °C and 1013 hPa
• CO₂ resolution: 1 ppm
• External probe: 1 m cable (optional 2 or 4 m)
• LED indicator: Green ≤1000 ppm | Yellow 1001–1200 ppm | Red ≥1201 ppm
• Communication: RS485, Modbus RTU, ARION, Advantech ADAM
• Power supply: 9–30 V DC
• Operating temperature: –30 to +80 °C
• Protection rating: IP65
• Dimensions: 88.5 × 94 × 39.5 mm
• Weight: approx. 250 g
• Warranty: 3 years

Perfectly suited for:

• Humid, dusty, or corrosive environments
• Greenhouses and biogas systems
• Breweries and beverage production
• Warehouses and silos
• Shafts and hard-to-reach areas
• Industrial facilities with high CO₂ levels
• Technical rooms and electrical cabinets
• Demand-controlled ventilation in harsh environments

Installation – flexible and simple

Mount the electronics housing on the wall, place the external probe where required, connect power and RS485 – done. The probe can also be installed into ducts or tanks.

Summary:

• CO₂ sensor – carbon dioxide concentration transmitter
• The device is supplied with a CO₂ probe and a 1 m cable
• Green LED lights: CO₂ concentration 0 to 1000 ppm
• Yellow LED lights: CO₂ concentration 1001 to 1200 ppm
• Red LED lights: CO₂ concentration 1201 ppm and higher

Scope of delivery:

• T5441
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration