Duct CO2 sensor | carbon dioxide concentration meter | RS485 / 4-20mA / 0-10V | 16-30VDC | IP65

Technical specifications

Type: duct CO₂ transmitter / sensor
Purpose: CO₂ concentration measurement in ventilation ducts
Measurement range: 0–2000 ppm; 0–5000 ppm
Accuracy: ±(40 ppm + 3 % MV)
Output signals: RS485 (Modbus); 4–20 mA; 0–5 VDC; 0–10 VDC
Supply voltage: 16–30 VDC
Temperature compensation range: 0°C – 56°C
Operating humidity: 0–85 % RH (non-condensing)
Warm-up time (T90): approx. 2 minutes
Protection class: housing – IP65; sensor probe – IP30
Expected service life: >5 years

Functions

Accurate CO₂ concentration measurement – the sensor allows real-time monitoring of carbon dioxide levels and ensures proper indoor air quality.

Multiple signal outputs – both analog and digital signals are supported, allowing easy integration into various automation systems.

Duct mounting – specifically designed for ventilation ducts, making it ideal for HVAC systems.

High environmental protection – IP65 protection class allows the sensor to be used in demanding industrial or technical environments.

Fast operation start – only about 2 minutes warm-up time, allowing the device to begin accurate measurement quickly.

Long service life – more than 5 years of operation reduces maintenance and replacement costs.

Applications

For residential users: Used in modern smart homes, heat recovery ventilation systems, home ventilation control and indoor air quality monitoring. The sensor helps maintain healthy CO₂ levels indoors and ensures that ventilation operates only when necessary.

For engineers and designers: Suitable for BMS systems, HVAC projects, energy efficiency solutions and air quality monitoring in large buildings. A wide range of signal outputs allows easy integration into various automation systems.

For electricians and automation specialists: Convenient installation in ventilation ducts, universal signal outputs, stable 16–30VDC power supply, compatibility with PLCs, controllers and automation modules. Therefore, this sensor is often used when automating ventilation systems in offices, schools, shopping centers and industrial facilities.

Advantages

High measurement accuracy
Multiple signal outputs (RS485, 4-20mA, 0-10V, 0-5V)
Suitable for HVAC and BMS systems
IP65 housing protection
Fast warm-up time
Long service life (>5 years)
Stable operation in various environments
Easy integration into automatic control systems

Disadvantages

Requires a 16–30VDC power supply
Designed for duct installation, therefore not suitable for direct wall measurement
Integration with automation systems may require a PLC or BMS controller