High-precision commercial and industrial gas transmitters engineered for seamless integration into modern Building Management Systems (BMS).
Metro Manila, as the vibrant economic heart of the Philippines, is experiencing an unprecedented commercial infrastructure boom. From the sprawling business hubs of Bonifacio Global City (BGC), Makati Central Business District, and Ortigas Center to major industrial zones across Laguna, Cavite, and Bulacan, modern infrastructure requires robust indoor environmental controls. The hot, humid tropical climate of Manila necessitates continuous air conditioning, which often leads to tightly sealed buildings with minimal natural fresh air exchange.
Without smart Demand-Controlled Ventilation (DCV), sealed indoor environments quickly accumulate excessive levels of Carbon Dioxide (CO2), leading to sick building syndrome, reduced worker productivity, high somnolence, and elevated health risks. As a specialized Carbon Dioxide Monitors And Controllers Factory & Manufacturer in Manila partner, Tongdy Sensing Technology provides state-of-the-art sensing instruments designed specifically to handle high ambient humidity, heavy occupancy loads, and strict energy efficiency requirements across Metro Manila.
Help you build and maintain a healthy indoor environment
Our work makes a difference in helping you make the healthy indoor air quality. As one of the earliest companies in China engaged in air quality monitoring products, Tongdy has been always focusing on its strong technology development and design capabilities on the indoor air quality monitors.
For over 15 to 20 years, Tongdy Sensing Technology has engineered advanced gas sensors, multi-parameter air quality transmitters, and smart BACnet/Modbus controllers. By extending direct direct-factory supply chains and OEM custom manufacturing to systems integrators, mechanical contractors, and smart building consultants in Manila and across Southeast Asia, Tongdy bridges the gap between precision sensing hardware and green building automation.
Our Purpose: We foster research and development on obtaining accurate air quality data, help you well understand and improve the air you breathe by quantitative assessment and data analysis.
For pursuing our ultimate purpose of creating healthy indoor air quality, we’re committed to obtain real and accurate data and cultivating the next generation of innovators in technology and engineering.
How precision CO2 monitoring is transforming commercial real estate, industrial production, and healthcare infrastructure in the Philippines.
Manila is the BPO capital of the world. Call centers in BGC and Quezon City operate around the clock with dense seating arrangements. Dual-channel NDIR CO2 monitors automatically regulate fresh air dampers via BACnet, preventing cognitive fatigue and meeting DOLE (Department of Labor and Employment) ventilation standards.
With Philippines' BERDE and international LEED/WELL certifications gaining momentum, mega-malls and commercial high-rises rely on Tongdy CO2 transmitters to optimize HVAC chillers, slashing energy consumption by up to 30% through Demand-Controlled Ventilation.
Industrial zones surrounding Metro Manila rely on high-concentration CO2 sensors (0-5000 ppm up to 5% vol) for carbonation processing, modified atmosphere packaging, and cold storage safety alarms, protecting facility workers from gas leaks.
Medical centers in Manila employ Tongdy multi-gas transmitters and dew-proof thermostats to maintain precise pressure differentials, control humidity, and monitor ambient CO2 levels in patient rooms and surgical suites.
Schools and universities across Manila's University Belt install compact wall-mounted CO2 monitors with visual LCD indicators, providing immediate alerts when room ventilation falls below recommended safety thresholds.
Basement car parks in commercial complexes utilize Tongdy combined CO and CO2 controllers with RS485 interfaces to automatically activate exhaust fans only when gas concentrations rise, minimizing unnecessary fan usage.
Why leading system integrators in Manila choose Tongdy as their trusted factory and manufacturing partner.
Proprietary self-calibration algorithms maintain long-term measurement accuracy across variable tropical ambient temperatures and humidity in the Philippines.
Special multi-sensor module engineered with a sealed cast aluminum structure housing up to six environmental sensors simultaneously inside a single robust unit.
Tongdy-owned manufacturing plant with substantial ongoing investment in R&D to ensure zero-defect product reliability, ISO compliance, and technological innovation.
“MyTongdy” cloud platform empowers smart building managers to view, analyze, and diagnose real-time indoor air quality metrics via PC dashboard or mobile app.




Tongdy actively develops indoor air quality monitors and is devoted to fostering healthy indoor air environments worldwide. As a responsible corporate citizen, Tongdy collaborates with public benefit initiatives such as the International WELL Building Institute (IWBI). By exploring the direct impact of indoor air quality on human health based on The WELL Building Standard™, Tongdy helps Manila building owners achieve WELL and LEED certifications effortlessly.
International quality standards ensuring reliable performance for Philippine engineering standards.
Explore our full range of factory-direct sensors, transmitters, and controllers available for shipment to Manila and nationwide projects.