Large commercial buildings, office towers, mixed-use developments, and even residential complexes commonly include underground parking garages, and the scale of these facilities continues to grow. During vehicle parking and engine startup, large amounts of exhaust gases are generated. Among them, carbon monoxide (CO) is one of the most dangerous pollutants.
Carbon monoxide is colorless and odorless, yet even relatively low concentrations can be toxic and potentially fatal. For this reason, CO levels must be strictly monitored in enclosed or semi-enclosed environments.
When ventilation is insufficient in underground spaces, CO concentrations can rise rapidly and pose serious health risks to people in the parking facility. As a result, CO monitoring and ventilation control systems have become an essential safety infrastructure for underground parking garages.
The TKG-CO Carbon Monoxide Controller is designed specifically for such applications. It continuously monitors CO concentrations in the air and automatically controls ventilation systems based on the measured data, ensuring safe air quality in enclosed or semi-enclosed environments. The system provides 24/7 intelligent ventilation management and complies with international regulatory requirements.
The following section introduces one of the TKG-CO application projects: SM Cyber West, a well-known office building in the Philippines.
What is the TKG-CO Carbon Monoxide Controller?
The TKG-CO Series Carbon Monoxide Controller is an intelligent device designed to monitor CO concentration in real-time and control ventilation systems automatically. It operates continuously to maintain safe air quality.
It is widely used in environments such as:
Underground parking garages
Basement parking facilities
Semi-underground tunnels
Office buildings and other commercial public spaces
Key Features of the TKG-CO Controller
Fast and Accurate CO Detection
The TKG-CO controller uses a high-quality Japanese electrochemical CO sensor, providing continuous monitoring and fast response to changes in carbon monoxide concentration.
Real-Time LCD Display
The integrated LCD screen displays real-time monitoring data, including:
CO concentration (ppm)
Temperature (optional)
Relative humidity (optional)
These parameters allow for more precise ventilation optimization.
Analog Linear Output
The controller provides 0–10V or 4–20mA analog outputs, which can be directly connected to:
PLC control systems
Ventilation controllers
Building automation systems (BAS)
Through these signals, the ventilation system can automatically adjust its operation according to the CO concentration level.
Dual Relay Outputs
Two relay outputs can control:
Exhaust fans
Fresh air systems
Alarm devices
When CO concentration reaches preset thresholds, the controller automatically activates ventilation equipment.
RS485 Communication
The TKG-CO supports RS485 communication and is compatible with:
Modbus RTU
BACnet MS/TP
This allows seamless integration into ventilation control systems or BAS platforms for centralized monitoring and intelligent building management.
Design Advantages of the TKG-CO Controller
To ensure long-term reliability, the TKG-CO incorporates several optimized design features.
External Sensor Probe Design
The CO sensor is installed as an external probe, preventing heat generated by the controller from affecting measurement accuracy and improving overall stability.
High-Quality CO Sensor
The electrochemical sensor offers:
High sensitivity
Fast response
Long service life (typically over 5 years)
The modular sensor design also allows for easy replacement.
Environmental Compensation Algorithm
An integrated environmental compensation algorithm minimizes measurement deviations caused by temperature and humidity variations, ensuring accurate CO readings under different climate conditions.
Robust Structural Design
The housing is made of fire-resistant PC/ABS material, providing durability and reliability for long-term installation in public environments.
Typical Applications
The TKG-CO controller is widely used in locations where CO monitoring and ventilation control are required, including:
Underground parking garages
Underground or semi-underground tunnels
Restaurants and commercial kitchens
Any indoor environment where carbon monoxide may accumulate
Project Case: SM Cyber West, Quezon City, Philippines
SM Cyber West is located in the central business district of Quezon City, Philippines. Developed by the SM Group, it is a landmark commercial office building within the Quezon CBD.
Project Requirements
The building includes a large underground parking facility. Monitoring and controlling carbon monoxide levels in the parking area became a critical part of the building's safety management system.
Solution
TKG-CO carbon monoxide controllers were installed throughout the underground parking zones to continuously monitor CO concentration.
The controllers are integrated into the building control system via RS485 communication for centralized monitoring. Meanwhile, the relay outputs interface directly with the parking garage ventilation system, enabling independent and automated ventilation control.
Implementation Results
After installation, the TKG-CO system significantly improved facility management:
Ensured safe air quality in the underground parking garage
Enabled demand-based ventilation to reduce energy consumption
Enhanced property management efficiency
Increased the long-term value of the building asset
Frequently Asked Questions (FAQ)
Why is CO monitoring necessary in underground parking garages?
Vehicle exhaust contains carbon monoxide, which can accumulate in enclosed spaces. CO monitoring devices automatically control ventilation systems to maintain safe air conditions.
Where should CO controllers be installed?
They are typically installed in high vehicle density areas, such as on columns, walls, or ceilings within parking facilities.
How often should CO sensors be replaced?
Electrochemical CO sensors typically have a lifespan of 3–5 years.
Can the TKG-CO connect to a BAS system?
Yes. The TKG-CO supports Modbus RTU and BACnet MS/TP, enabling integration with building automation systems.
Conclusion
Carbon monoxide controllers ensure the safe operation of underground spaces and other environments where CO may accumulate by providing accurate real-time monitoring, measurement outputs, and ventilation control signals.
The successful deployment at SM Cyber West in the Philippines demonstrates the reliability and practical value of air quality monitoring systems in commercial buildings. This project is one of over 300 proven indoor air quality solutions delivered worldwide by Tongdy, further showcasing the continued application of Tongdy products in office buildings, commercial complexes, and high-end residential developments.
Post time: Mar-18-2026