Tongdy Sensing Technology Corporation

What Tongdy Sensing Technology Corporation does

Tongdy Sensing Technology Corporation is a Beijing-headquartered, privately held manufacturer of indoor air quality (IAQ) sensors, gas monitors, and HVAC control systems, operating in the segment for over 20 years. Its product portfolio spans more than 100 commercial-grade SKUs organized around five lines: multi-sensor IAQ monitors (PGX, MSD, PMD), carbon dioxide monitors and controllers (G01, GX series), single-gas monitors for CO and ozone (TSP-CO, G09-O3), TVOC and PM2.5 particulate monitors, and temperature/humidity sensors and controllers (F2000P-TH, F2000TSM, F2000LV VAV thermostat), plus an outdoor IAQ monitor (TF9). Core technical differentiators are a proprietary "environmental compensation algorithm," a constant-flow fan design for consistent air sampling, integration of up to 12 simultaneous sensing parameters, and a broad protocol stack (BACnet, Modbus, RS485, Wi-Fi, Ethernet, 4G, LoRaWAN, MQTT, Tuya, Qlear) for BMS/BAS interoperability. The portfolio carries CE, FCC, RoHS, ICES, ISO 9001, and RESET Air accreditations and is aligned with WELL and LEED green-building specifications.

The company monetizes through three streams: hardware product sales (commercial-grade monitors, controllers, and sensors), professional ODM services for customized gas detection and control solutions, and remote managed services including calibration and troubleshooting for deployed systems. Pricing is quote-based with no public disclosure, contracts are typically multi-year, and sales are executed via direct enterprise field sales, channel partners (HVAC contractors and building automation integrators), regional distributors, and OEM/ODM relationships. Named customers span multiple geographies and verticals — TikTok APAC HQ, NVIDIA Shanghai (200 monitors), Dior, Celine Seoul, Kerry Properties Tianjin, Makro Thailand (500 monitors), Six Senses Bangkok, Woodlands Health Campus Singapore, Duke Kunshan University, and 75 Rockefeller Plaza — collectively cited as 300+ projects and 100+ commercial buildings worldwide. The company maintains a 30+ language global website and active presence across Facebook, X, LinkedIn, and YouTube, with no disclosed funding rounds, parent entity, or acquisitions.

Name

Tongdy Sensing Technology Corporation

Legal name

Tongdy Sensing Technology Corporation

Website

https://www.iaqtongdy.com

Company type

Private

Founded year

1999

Operating status

Operating

Short description

Tongdy Sensing Technology Corporation is a Beijing-based, privately held manufacturer of commercial-grade indoor air quality sensors, gas monitors, and HVAC/BMS controllers, serving global enterprise customers across commercial buildings, retail, healthcare, and education with 100+ products deployed in 300+ projects.

Ownership category

akta.pro rank

Product category

Indoor Air Quality Monitoring Sensors

NAICS

Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Other Measuring and Controlling Device Manufacturing (334519), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (3334), Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Steam & Air-Conditioning Supply (4961)

akta.pro primary industry

Indoor Air Quality (IAQ) Environmental Monitoring (VOC/CO2/PM2.5) (HSAHAGAG)

akta.pro secondary industries

Environmental Sensors (Temperature/Humidity/Gas/Air Quality) (HDAHALAD), Smart Climate & Air Quality (Thermostats, HVAC, Purifiers, IAQ Sensors) (HSAPAQAD), Building Thermal Controls & Building Management Systems (HVAC BMS) (IMAHAKAK), HVAC Zoning, Smart Dampers & Ventilation Control (HSAOANAB), Smart Sensors Retail (Motion, Contact, Leak, Smoke/CO, Air Quality) (CRAIAMAH)

Keywords

• Indoor air quality monitors
• Gas detection sensors
• HVAC control systems
• BMS integration monitors
• Green building sensors

Headquarters

HQ city

Beijing

HQ country

China

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Hardware Product Sales: Sale of commercial-grade air quality monitors, controllers, and sensors including multi-sensor monitors, CO2 monitors, gas detectors, and temperature/humidity controllers. Products are sold directly to enterprises and through channel partners.
2. ODM Professional Services: Professional Original Design Manufacturing services for customized gas detection and control solutions. Includes product customization to meet specific customer requirements.
3. Remote Support Services: Remote services including calibration and troubleshooting for products in operation. Ongoing support and maintenance services for deployed systems.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

Tongdy Sensing Technology Corporation designs and manufactures commercial-grade indoor air quality monitors, gas detectors (CO2, CO, O3, TVOC, PM2.5), temperature/humidity controllers, VAV thermostats, and outdoor air quality monitors for HVAC systems, building management systems (BMS), and green buildings. The company also provides ODM (Original Design Manufacturing) services for customized gas detection and control solutions, plus remote calibration and troubleshooting support for deployed products. Devices are sold directly to enterprise customers and through HVAC/building automation channel partners globally.

Product overview

Tongdy Sensing Technology Corporation is a manufacturer of environmental monitoring products and solutions with over 20 years of experience. The product portfolio centers on indoor air quality (IAQ) monitoring and control for commercial buildings, HVAC systems, and building management systems (BMS). The core offerings include the PGX Super Indoor Environment Monitor (flagship 12-parameter monitor), MSD Indoor Air Quality Monitor (up to 7 sensors), and PMD Series In-Duct monitors for duct installation. The CO2 product line encompasses the G01-CO2 monitor/controllers with temperature and humidity options, and GX Series with TVOC options and PID control. Single-gas monitoring includes TSP-CO carbon monoxide monitors and G09-O3 ozone controllers with split-sensor variants. Temperature and humidity control products feature the F2000P-TH series controllers and F2000TSM sensors with data logging and WiFi. The VAV thermostat (F2000LV) provides variable air volume control. Outdoor monitoring is addressed by the TF9 Outdoor Air Quality Monitor. All products support multiple communication interfaces including RS485, WiFi, Ethernet, 4G, LoRaWAN, and industrial protocols such as BACnet and Modbus for BAS/BMS integration. The company provides over 100 commercial-grade monitoring and control products deployed in green building certifications including WELL, LEED, and RESET.

Differentiator

Problem solved

Functional benefit

Products and services

• PGX Super Indoor Environment Monitor Professional commercial-grade indoor environment monitor that measures up to 12 air-quality parameters in real time, including CO2, PM2.5, PM10, PM1.0, TVOC, CO, formaldehyde, noise, illuminance, temperature, and humidity. Features an HD color display with data curves and AQI visualization and 3-12 months of onboard data logger storage. Designed for commercial buildings, smart buildings, and green-building certified facilities that require multi-parameter IAQ data with BMS integration.
• MSD Indoor Air Quality Monitor Commercial-grade real-time multi-sensor indoor air quality monitor integrating up to 7 sensors including PM2.5, PM10, CO2, TVOC, temperature, and humidity, with optional ozone, carbon monoxide, and formaldehyde. Uses a unique built-in sensing module, fan with constant flow control, and Tongdy's environmental compensation algorithm. Supports RS485, Wi-Fi, RJ45, LoRaWAN, and 4G communication interfaces and holds RESET, CE, FCC, and ICES certifications.
• PMD Series In-Duct Multi-Sensor Monitor In-duct air quality monitor designed for installation inside HVAC air ducts. Provides reliable multi-sensor data throughout its full lifecycle for HVAC and BAS applications, with professional data output for building automation.
• EM21 Series Air Quality Monitors Wall-mounted commercial indoor air quality monitors designed for green buildings and smart buildings, available in multiple variants including LoRaWAN-enabled versions for long-range, low-power wireless connectivity. Combines multiple sensors for IAQ monitoring in office and commercial environments.
• G01-CO2 CO2 Monitor with Temperature and Humidity Real-time CO2 monitor with temperature and relative humidity measurement. Features a 3-color backlight LCD for three CO2 concentration ranges and options to display 24-hour averages and maximum CO2 values. Designed for HVAC, BMS, and green-building applications.
• GX Series CO2 Monitor and Controller with TVOC Option Real-time carbon dioxide monitor and controller with optional temperature, humidity, or TVOC measurement. Provides up to three linear 0-10VDC or PID outputs and up to three relay outputs for comprehensive HVAC control, with on-site programmability.
• G01-CO2-B 3-in-1 CO2 Sensor Transmitter Ambient carbon dioxide transmitter combining humidity and temperature sensors with digital auto-compensation for enhanced accuracy, intended for HVAC, BMS, and ventilation-control integration.
• TSP-CO CO Monitor and Controller Real-time carbon monoxide monitor and controller with temperature measurement, OLED screen, and optional buzzer alarm. Designed for parking garages and industrial safety applications requiring code-compliant CO detection and ventilation control.
• G09-O3 Ozone Sensor and Controller Real-time air ozone monitor and controller with optional temperature and humidity. Incorporates temperature and humidity compensation algorithms for accurate readings in disinfection and industrial applications.
• O3/CO Split Controller with Fan-in-Probe Sensor Split-installation controller with display and external sensor probe that can be extended into a duct, cabin, or other remote location. Allows flexible installation for ozone or carbon monoxide monitoring in various environments.
• F2000P-TH Series Temperature and Humidity Controller Displays and controls ambient relative humidity and temperature via an LCD showing room readings, set points, and control status. Provides one or two dry contact outputs to control humidifier/dehumidifier and cooling/heating devices.
• F2000TSM Temperature and Humidity Sensor with Data Logger Temperature and humidity sensor and transmitter equipped with onboard data logging, Wi-Fi connectivity, and a companion mobile app. Supports Bluetooth data download, RS485 (Modbus RTU), and optional analog outputs for HVAC and BMS applications.
• F2000LV VAV Room Thermostat VAV room thermostat controlling VAV room terminals with one or two 0-10V PID outputs for cooling/heating dampers, plus optional relay outputs for multi-stage control. Available with RS485 option.
• TF9 Outdoor Air Quality Monitor Outdoor air quality monitoring solution for commercial outdoor environmental monitoring, ESG compliance, and outdoor environment management, complementing Tongdy's indoor IAQ portfolio.
• TG9 In-Duct Multi-Gas Monitor In-duct multi-gas monitoring solution providing real-time multi-gas concentration data for HVAC and intelligent air management in commercial and residential applications.
• Telaire CO2 Module (Amphenol) CO2 sensor modules from Telaire (Amphenol) offered for integration into Tongdy products or third-party systems. Includes Telaire 6703 measuring CO2 concentration up to 5,000 ppm.
• ODM (Original Design Manufacturing) Services Professional Original Design Manufacturing services enabling customization of Tongdy air quality and gas detection hardware to meet specific customer requirements for multinational companies and large organizations requiring tailored solutions.
• Remote Calibration and Support Services Remote calibration and troubleshooting services for products already in operation, providing ongoing maintenance and support to ensure long-term accuracy and reliability of deployed IAQ systems.
• MSD-E In-Duct Air Quality Monitor In-duct air quality monitor designed for HVAC duct installation with unique structural design and professional data output, complementing Tongdy's HVAC integration product line.

Quantifiable outcome

• Products deployed in over 300 projects worldwide
• +2 more outcomes

Named customers12 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

AI capability2 records

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• Amphenol (Telaire)coreTechnology or IntegrationTongdy integrates Telaire CO2 sensor modules (manufactured by Amphenol) into their product portfolio. The Telaire CO2 module product line includes models such as Telaire 6703 and Telaire 6713, which are offered as part of Tongdy's CO2 sensor module offerings for various applications.
• RESET Standard OrganizationcoreStrategic or Co-development PartnerTongdy maintains a strategic relationship with RESET Standard, participating in RESET events and webinars. The company has been featured in Plant a Sensor campaigns and educational webinars with RESET. Products are RESET Air Accredited Monitors.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Sensirion: Swiss manufacturer of high-precision environmental sensors including CO2, PM2.5, VOC, temperature, and humidity. Closely comparable to Tongdy as a sensor-component specialist serving HVAC, IAQ, and BAS integrators, with similar multi-parameter integration capabilities.
• Kaiterra: Commercial-grade IAQ monitor manufacturer offering multi-parameter devices with cloud and BAS integration. Competes directly with Tongdy in the professional IAQ segment serving green-certified buildings, smart offices, and enterprise customers.
• Amphenol Advanced Sensors (Telaire): Major manufacturer of CO2 and gas sensor modules including the Telaire line that Tongdy integrates. Directly comparable as a commercial IAQ sensor supplier; also a strategic upstream partner to Tongdy.

Emerging players

• Awair: IAQ monitoring company focused on indoor environments with multi-sensor devices and cloud dashboards. Comparable to Tongdy's MSD/PGX product lines in addressing commercial and prosumer demand for environmental data, though with lighter HVAC control depth.
• 75F: IoT-based smart building platform combining IAQ sensors with HVAC control and analytics. Comparable to Tongdy in targeting the commercial smart-building segment with multi-parameter monitoring and BAS integration.
• Netatmo (Legrand): Smart home and light-commercial IAQ monitor maker with cloud connectivity and multi-parameter sensors. Adjacent peer to Tongdy with overlapping sensor technology but focused more on consumer/prosumer versus pure commercial enterprise.

Broad incumbents

• Honeywell Building Technologies: Global BAS incumbent offering IAQ sensors as part of broader building automation portfolios. Competes with Tongdy for enterprise IAQ contracts but with greater scale, channel reach, and bundled solutions.
• Siemens Smart Infrastructure: Provides building automation systems with integrated IAQ monitoring through the Desigo and Navigator platforms. A broad incumbent competitor to Tongdy for large commercial and green-building projects.
• BOSCH (Building Technologies): Global sensor and building systems provider with commercial IAQ products integrated into larger building management offerings. Comparable to Tongdy in sensor capability but with broader portfolio and deeper enterprise relationships.

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Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/tongdysensing
• YouTubeyoutube.com/@Tongdysensing
• Facebookfacebook.com/TongdySensingIAQ
• LinkedInlinkedin.com/company/iaqtongdy

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Tongdy Sensing Technology Corporation