Office Air Quality Monitoring Solutions
Explore Tongdy's core product line engineered for precise, reliable indoor air quality monitoring in office and commercial environments.
The Intelligent Answer to Office Air Quality Challenges
The EM21 Multi-Parameter Air Quality Monitor is Tongdy's flagship indoor air quality solution, purpose-built for the complex demands of modern office environments. Unlike single-parameter detectors, the EM21 integrates multiple high-precision sensors within a single compact unit — simultaneously monitoring CO₂, TVOC, PM2.5, temperature, humidity, and more.
Offices present unique air quality challenges: high occupancy density, recirculated HVAC air, off-gassing from furniture and building materials, and variable occupant activities all contribute to elevated pollutant levels. The EM21 is designed to address all of these with real-time data accuracy and seamless BMS integration.
With the rise of WELL Building certification, LEED compliance, and increasing regulatory attention to indoor environmental quality, the EM21 represents not just a monitoring device — it's a strategic tool for facility managers, sustainability teams, and corporate health officers.
Office Air Quality Monitoring: Market Landscape & Commercial Reality
The global indoor air quality monitoring market is expanding rapidly — driven by health awareness, regulatory requirements, and the post-pandemic shift toward healthier workplaces.
📈 Rapid Market Growth
The global IAQ monitoring market is projected to exceed USD 6.5 billion by 2030, with commercial offices being one of the fastest-growing segments. Demand for multi-parameter devices like the EM21 is accelerating as businesses prioritize occupant wellness and operational efficiency.
🏛 Post-Pandemic Workplace Transformation
COVID-19 fundamentally changed how organizations think about indoor environments. Employers are now legally and reputationally accountable for air quality. Multi-parameter monitors that measure ventilation adequacy (CO₂), particulate matter (PM2.5), and VOC levels have become standard infrastructure in forward-thinking offices.
⚖ Green Building Certification Pressure
LEED v4.1, WELL Building Standard™, RESET Air, and BREEAM all require continuous, validated air quality data. The EM21's calibrated multi-sensor output meets these certification data requirements, giving facility managers audit-ready reports without additional investment.
💻 Smart Building & BMS Integration
Modern offices deploy Building Management Systems (BMS) that need reliable sensor data to automate HVAC responses. The EM21 supports RS485/Modbus RTU protocols, enabling plug-and-play integration with existing BMS platforms and demand-controlled ventilation (DCV) systems.
⚖ ESG & Corporate Wellness Reporting
As ESG (Environmental, Social, and Governance) reporting becomes mandatory for publicly traded companies in many markets, quantifiable indoor environmental quality data is increasingly included in sustainability disclosures. EM21's data logging and export capabilities directly support this compliance need.
💡 AI-Driven Predictive HVAC Optimization
The convergence of IAQ sensor networks with AI analytics platforms is enabling predictive HVAC control — reducing energy consumption by up to 30% while maintaining optimal air quality. EM21 serves as the critical data node in these next-generation smart office ecosystems.
Why Office Air Quality Monitoring Matters
The data is clear: air quality directly impacts the health, cognitive performance, and productivity of every person in your building.
EM21 In-Depth Application Scenarios
From open-plan offices to specialized industrial workspaces, the EM21 Multi-Parameter Air Quality Monitor delivers actionable data across a wide range of professional environments.
Open-Plan Corporate Offices
Monitor CO₂ accumulation in high-density workstations. Trigger demand-controlled ventilation automatically when CO₂ exceeds 1000 ppm to maintain cognitive performance.
Conference & Meeting Rooms
Meeting rooms see rapid CO₂ spikes during occupied periods. EM21 provides real-time display and automated alerts, ensuring fresh air during critical discussions.
Healthcare & Medical Offices
Multi-parameter monitoring — including TVOC and PM2.5 — ensures clinical environments meet stringent hygiene standards while protecting both patients and staff.
Educational Institutions
Studies confirm that high CO₂ in classrooms directly reduces student test scores. EM21 monitors enable proactive ventilation management for optimized learning environments.
Industrial & Manufacturing Facilities
In production environments, monitoring VOCs, CO, and particulate matter protects workers from occupational exposure hazards and ensures regulatory compliance.
Smart Building & LEED Projects
EM21's validated data output supports WELL v2 and LEED EQ credit documentation, integrating seamlessly with BMS platforms for automated compliance reporting.
Co-Working & Flexible Workspaces
Variable occupancy demands adaptive air quality management. EM21 enables zone-by-zone monitoring and automated HVAC adjustment in dynamic workspace environments.
Residential & Mixed-Use Developments
High-end residential complexes and mixed-use towers deploy EM21 to provide tenants with transparent air quality data — a key differentiator in premium real estate.
Tongdy Sensing Technology Corporation
Help You Build and Maintain a Healthy Indoor Environment
Our work makes a difference in helping you achieve 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 indoor air quality monitors.
Focus on Air Quality Detection and Control for Over 20 Years
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.
Why Choose Tongdy for Office Air Quality Monitoring
Two decades of specialized IAQ engineering, distilled into products and platforms that set the standard for accuracy, reliability, and integration.
20+ Years of IAQ & HVAC Expertise
Trusted by clients globally for high-quality products and professional service, fully compliant with Green Building standards.
100+ Monitoring & Control Products
Over 100 commercial-grade monitors and controllers, including CO₂, single-gas, and multi-sensor solutions for HVAC, BMS, and green building applications.
Exclusive Calibration Algorithm
Proprietary technology — an effective calibration method to support higher data accuracy across different environmental conditions.
Unique Multi-Sensor Module
Special multi-sensor module with sealed cast aluminum structure, accommodating up to six sensors in a single compact housing.
Continuous R&D Investment
Tongdy-owned facilities with huge investment in research and development to ensure product reliability, longevity, and continuous innovation.
MyTongdy Cloud Platform
"MyTongdy" platform helps you read and analyze your air quality data on PC or mobile APP — real-time and historical data at your fingertips.
Reliable & Accurate Data
Providing smart building managers with actionable, real-time data to make informed, data-driven decisions for health-centered environments.
Tailored to Your Specific Needs
Flexible hardware, professional expertise and fast delivery enable cost-effective, customized gas detection and control solutions for every project.
Our Values
The principles that guide every product we design and every partnership we build.
Exclusive Innovative Calibration Algorithm
Proprietary technology, the effective calibration method to support higher data accuracy in different environments.
Unique Professional Multi-Sensor Module
Special multi-sensor module with the sealed cast aluminum structure and up to six sensors inside.
Continuous R&D Investment and Product Quality Control
Tongdy-owned, with huge investment in research and development to ensure product reliability and innovation.
Real-Time Data Monitoring & Historical Analysis
"MyTongdy" Platform will help you reading and analyzing data of your air quality on PC or mobile APP.
The Expert of Indoor Air Quality Data
Over 20 years experience in indoor air quality — Tongdy provides accurate data to foster health-centered indoor environments.
Certificates and Honor
Our quality management, product certifications, and industry recognitions reflect our commitment to standards that matter in office air quality monitoring.
Ready to Transform Your Office Air Quality?
Connect with Tongdy's IAQ specialists to find the right EM21 configuration for your office environment — from single-floor deployments to full campus-wide monitoring networks.
Get Expert ConsultationComplete Range of Office Air Quality Monitoring Products
From standalone sensors to full BMS-integrated controllers — Tongdy's product lineup covers every air quality monitoring need for modern commercial and office environments.
Social Responsibility
Tongdy actively develops air quality monitors and is devoted to healthy indoor air quality, striving to become an excellent enterprise model.
As a corporate citizen, Tongdy has contributed to public welfare undertakings such as cooperating with public benefit organizations, including WELL — the world's leading organization focused on deploying people-first places to advance a global culture of health, especially exploring the impact of indoor air quality on people's health based on The WELL Building Standard™.
We believe that access to clean indoor air is a fundamental right, not a luxury. Through continuous product innovation and community partnerships, Tongdy is committed to making healthy indoor environments accessible to workplaces of every scale — from single-room offices to multi-tower commercial developments.