COMET T5340 – CO₂ Transmitter with Internal Sensor, RS232

COMET T5340 CO₂ Transmitter RS232 Internal Sensor 

The COMET T5340 is a compact and reliable CO₂ concentration transmitter with an internal NDIR sensor for professional indoor air quality monitoring. With its high-quality sensor, it precisely measures carbon dioxide concentrations from 0 to 5000 ppm and, thanks to the integrated 3-color LED indicator, instantly displays air quality: Green = good (up to 1000 ppm), Yellow = moderate (1001–1200 ppm), Red = poor (from 1201 ppm).

It is ideal for offices, schools, conference rooms, production halls, warehouses, or anywhere many people gather and demand-controlled ventilation helps save energy and protect health. The maintenance-free sensor with automatic calibration ensures years of accuracy without readjustment.

Via the RS232 interface with Modbus RTU protocol (and compatible with Advantech ADAM), the T5340 can be seamlessly integrated into any building automation, ventilation control, or SCADA system. The robust housing is designed for continuous operation from –30 to +60 °C, making it perfect for unheated technical rooms or corridors.

Compact, unobtrusive, and easy to install – the T5340 is the smart solution for modern indoor air monitoring.

Why the COMET T5340 is the best choice for CO₂ monitoring:

• Precise internal NDIR CO₂ sensor 0–5000 ppm (±50 ppm + 3%)
• 3-color LED indicator – instantly visible air quality
• RS232 Modbus RTU – easy integration into automation systems
• Maintenance-free thanks to automatic calibration
• Optionally extendable up to 10,000 ppm (for an additional cost)
• Rugged housing – operating temperature –30 to +60 °C
• Compact dimensions: 88.5 × 94 × 39.5 mm
• Easy wall mounting
• 3-year warranty

Technical data:

• CO₂ measuring range: 0 to 5000 ppm
• CO₂ accuracy: ±(50 ppm + 3% of the measured value) at 25 °C and 1013 hPa
• CO₂ resolution: 1 ppm
• LED indicator: Green ≤1000 ppm | Yellow 1001–1200 ppm | Red ≥1201 ppm
• Communication: RS232, Modbus RTU, Advantech ADAM
• Power supply: 9–30 V DC
• Operating temperature: –30 to +60 °C
• Protection rating: IP30
• Dimensions: 88.5 × 94 × 39.5 mm
• Weight: approx. 145 g
• Warranty: 3 years

Perfectly suited for:

• Schools, kindergartens, lecture halls
• Offices, open-plan offices, call centers
• Conference and meeting rooms
• Production and storage halls
• Restaurants, fitness centers, wellness areas
• Hospitals, waiting rooms
• Demand-controlled ventilation systems
• Building automation and energy management

Installation – done in minutes

Mount with two screws on the wall, connect power and RS232 – and you’re done. The LED indicator immediately displays the current CO₂ value.

Summary:

• CO₂ sensor – carbon dioxide level indicator
• Green LED on – CO₂ concentration 0 to 1000 ppm
• Yellow LED on – CO₂ concentration 1001 to 1200 ppm
• Red LED on – CO₂ concentration 1201 ppm and higher

Scope of delivery:

• T5340
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration