CO2 transmitter INS-TR-CO2-3X5 / INS-TR-HR-CO2-3X6

Summary
In an air handling unit (AHU), controlling CO₂ levels is essential to ensure occupant comfort, energy performance and regulatory compliance. The INS-TR-CO2-3X5 and INS-TR-HR-CO2-3X6 are transmitters designed to deliver reliable, usable measurements for professional HVAC environments. Available in CO₂-only or CO₂+humidity versions, they enable demand-controlled ventilation based on actual room occupancy.

CO₂ measurement

• Ranges: 0 to 5000 ppm or 0 to 10000 ppm
• Sensitivity: ±10 ppm
• Accuracy: ±50 ppm + 2%

Humidity measurement (INS-TR-HR-CO2-3X6)

• Range: 0 to 100 % RH
• Sensitivity: ±1 %
• Accuracy: ±3 %

Integration and outputs
Each transmitter complies with market standards and provides the following interfaces:

• 0–10 V
• 4–20 mA
• Modbus RTU

Power and installation
Power supply: 12–24 Vdc. Designed for quick mounting on new or existing AHUs to reduce on-site intervention time.

Mechanical design and robustness
Engineered for continuous use in industrial and commercial ventilation, these transmitters offer: IP67 enclosure (excluding sensor), a washable filter to limit soiling, long service life and long-term measurement stability. Suitable for the demanding technical environment of air handling units.

Typical applications

• Air handling units (AHU)
• HVAC systems
• Commercial buildings
• Industrial sites
• Energy regulation driven by air quality

Product information
INS-TR-CO2-3X5: CO₂ transmitter
INS-TR-HR-CO2-3X6: Humidity and CO₂ transmitter
Power: 12–24 Vdc
Output signals: 0–10 V / 4–20 mA / Modbus RTU

References available
0–10 V output: INS-TR-CO2-305, INS-TR-HR-CO2-306
4–20 mA output: INS-TR-CO2-345, INS-TR-HR-CO2-346
Modbus RTU output: INS-TR-CO2-365, INS-TR-HR-CO2-366

Characteristics / technical specifications

• CO₂ measurement: ranges 0–5000 ppm or 0–10000 ppm
• CO₂ sensitivity: ±10 ppm
• CO₂ accuracy: ±50 ppm + 2%
• Humidity measurement (HR version): range 0–100 % RH, sensitivity ±1 %, accuracy ±3 %
• Output signals: 0–10 V, 4–20 mA, Modbus RTU
• Power supply: 12–24 Vdc
• Enclosure: IP67 (excluding the sensor)
• Filter: integrated washable filter to limit soiling
• Durability: long service life and long-term measurement stability
• Available models / references: INS-TR-CO2-305; INS-TR-HR-CO2-306; INS-TR-CO2-345; INS-TR-HR-CO2-346; INS-TR-CO2-365; INS-TR-HR-CO2-366
• SKU: N/A