CO2 Carbon Dioxide Transmitter/Controller | NDIR Sensor with LCD Display, 0-2000ppm

Take precise control of your indoor air quality (IAQ) with our advanced CO2 Carbon Dioxide Transmitter/Controller. Engineered for reliable and accurate environmental monitoring, this versatile device is essential for maintaining healthy and comfortable conditions in a wide range of commercial, industrial, and residential settings.

CO2 (Carbon Dioxide) is a naturally occurring gas, exhaled by humans and animals, and a byproduct of complete fossil fuel combustion. Monitoring its levels is crucial for optimizing ventilation, improving occupant well-being, and enhancing energy efficiency. Please note: This device monitors CO2 (Carbon Dioxide) and should not be confused with CO (Carbon Monoxide), a highly toxic gas produced by incomplete combustion.

Equipped with a high-performance NDIR digital sensor and an integrated LCD display, this transmitter provides real-time CO2 readings from 0-2000ppm, enabling proactive management of ventilation systems.

Key Features & Benefits:

• Precise Indoor Air Quality (IAQ) Monitoring: Designed specifically to accurately monitor CO2 levels, helping you maintain optimal indoor environments for health and productivity.
• High-Performance NDIR Sensor: Utilizes advanced Non-Dispersive Infrared (NDIR) technology for exceptional accuracy and reliability in CO2 measurement, ensuring consistent performance.
• Patented Sampling Probe Structure: Features an innovative probe design for superior air sampling, contributing to highly accurate and stable readings.
• Automatic Baseline Correction (ABC Algorithm): Smartly self-calibrates over time, maintaining long-term stability and accuracy without requiring manual adjustments, ensuring a virtually drift-free operation.
• Long-Life Sensor: Benefits from an impressive 15-year sensor life, significantly reducing maintenance and replacement costs.
• Multiple Output Options: Provides versatile integration with building management systems (BMS), HVAC controllers, and other automation systems with 4-20mA, 0-10VDC, and RS485/Modbus output selections.
• Integrated LCD Display & Function Keys: Allows for easy real-time CO2 monitoring directly on the device. Function keys enable convenient parameter setting, calibration, and output adjustment, allowing it to serve as a stand-alone controller.
• Robust & Reliable Design: Incorporates applied digital technology, overvoltage and polarity protection, high reliability, and excellent anti-interference capabilities for stable operation in various environments.
• Enhanced Wiring Safety: All electrical terminals are intelligently placed on the inside, protecting the PCB from potential damage during wiring and installation.
• Compact & Durable Housing: Housed in a fire-retardant PC (UL94V-0) casing with IP30 protection (housing IP65), ensuring safety and resilience.
• CE Approved: Meets European safety, health, and environmental protection requirements.

Technical Specifications:

• Sensor Type: NDIR (Non-Dispersive Infrared) sensor, with ABC Algorithm (Automatic Baseline Correction)
• Sampling Method: Diffusion
• Accuracy: ±50ppm
• Response Time (T90): <120 seconds (at 30cc/min, low airflow)
• Drift: <±10ppm/year (with ABC algorithm active)
• Measurement Range: 0 ~ 2000ppm (Operating measurement range: 400 ~ 2000 ppm)

• Coverage: 1 piece every 10m²

• Output Options:
  • Current: 4 ~ 20mA
  • Voltage: 0 ~ 10VDC
  • Digital: RS485 / Modbus
• Load Resistance:
  • Current Output: ≤500Ω
  • Voltage Output: ≥2kΩ
• Power Supply: 16 ~ 28VAC / 18 ~ 35VDC
• Display: Optional LCD, with unit display (ppm)
• Display Resolution: 1ppm
• Dimensions (LxWxD): 83 x 115 x 30mm
• Working Environment: 0 ~ 50°C, 0 ~ 85%RH (Non-condensing)
• Temperature Compensation: 10 ~ 50°C
• Storage Temperature: -20 ~ 60°C
• Housing Material: Fire retardant PC (UL94V-0)
• Protection Rating: IP30 (Housing IP65)
• Weight: 135g
• Approval: CE

*ABC Algorithm (Automatic Baseline Correction): This intelligent algorithm continuously monitors the sensor's lowest CO2 readings over a period of days. It then slowly adjusts for any detected long-term drift by comparing these readings to an expected fresh air baseline of 400 ppm CO2, ensuring sustained accuracy without manual recalibration.

Ideal Applications:

Our CO2 Carbon Dioxide Transmitter/Controller is perfect for:

• HVAC Systems: Optimizing ventilation rates based on occupancy.
• Building Management Systems (BMS): Centralized monitoring and control of indoor air quality.
• Offices & Commercial Buildings: Ensuring a healthy and productive work environment.
• Schools & Universities: Maintaining air quality in classrooms and lecture halls.
• Hospitals & Healthcare Facilities: Critical for patient and staff comfort and safety.
• Public Spaces: Theatres, cinemas, shopping centers, and conference rooms.
• Greenhouses & Agricultural Facilities: Monitoring CO2 for plant growth optimization.
• Residential Homes: For advanced smart home air quality monitoring.

Why Choose Our CO2 Transmitter/Controller?

When precise, reliable, and maintenance-free CO2 monitoring is essential, our NDIR sensor-based transmitter/controller delivers. Its robust design, advanced self-correction capabilities, and versatile outputs make it an ideal choice for integrating into any modern air quality management system. Trust in its 15-year sensor life and CE approval for long-term peace of mind and operational efficiency.

Invest in superior indoor air quality today. Add the CO2 Carbon Dioxide Transmitter/Controller to your cart!

Customer Reviews:

⭐⭐⭐⭐⭐

"Excellent Accuracy and Easy Integration"

"We installed this CO2 transmitter in our office HVAC system, and the accuracy is spot on. The 0-10V output integrated seamlessly with our BMS. The LCD display is also very handy for quick checks. Highly recommend for IAQ control." - Facility Manager, XYZ Corp, June 2025

Frequently Asked Questions (FAQs):

Q1: What is the difference between CO2 and CO, and which does this device detect?

A1: CO2 (Carbon Dioxide) is exhaled by humans and is typically monitored for ventilation and indoor air quality. CO (Carbon Monoxide) is a highly toxic gas produced by incomplete combustion. This device is specifically designed to detect CO2 (Carbon Dioxide) and does not detect Carbon Monoxide.

Q2: What is an NDIR sensor?

A2: NDIR stands for Non-Dispersive Infrared. It's a highly reliable and common technology for detecting gas concentrations. NDIR sensors work by measuring how much infrared light is absorbed by CO2 molecules in the air, providing accurate and stable readings.

Q3: What does the ABC Algorithm (Automatic Baseline Correction) do?

A3: The ABC algorithm is an intelligent self-calibration feature. It continuously tracks the lowest CO2 readings over a period (assuming fresh air levels of ~400ppm CO2 are periodically experienced). This allows the sensor to automatically correct for any potential long-term drift, ensuring its accuracy for years without manual calibration.

Q4: How do the multiple output options (4-20mA, 0-10V, RS485) benefit me?

A4: These multiple outputs provide versatility for integrating the transmitter into different control systems. 4-20mA and 0-10V are standard analog signals for direct input into HVAC controllers or PLCs, while RS485/Modbus allows for digital communication with building management systems (BMS) for more complex data exchange and control.

Q5: Is this suitable for outdoor use?

A5: The housing has an IP30 rating (IP65 for the housing, but generally the full unit is IP30 due to vents etc.), which means it's protected against solid objects larger than 2.5mm and dripping water. It is primarily designed for indoor air quality monitoring. For harsh outdoor conditions, a higher IP rating and specific environmental protection would be required.