Features

Professional and reliable IAQ monitoring enables data-driven decisions

MSD features a unique built-in sensing module, a fan with constant flow control, and a dedicated environmental compensation algorithm. MSD provides optional RS485, Wi Fi, RJ45, LoraWAN, 4G communication interfaces. It can measure PM2.5, PM10,CO2,TVOC, and Temp.& RH. MSD provides enhanced stability, accuracy, and long lifespan with an unique envionmental compensation algorithm. Ozone, carbon monoxide and formaldehyde are optional. MSD has RESET, CE, FCC, ICES etc. certifications.

Multi-Sensor Air Quality Monitors

“Tongdy" multi-sensor monitors provide prodessional air quality data. These monitors are used to simultaneously collect air data including PM2.5 PM10、CO2、TVOC、CO、HCHO、light, noise, temperature, and humidity, with providing options of RS485, WiFi, Ethernet, 4G, and LoraWAN interfaces, as well as data logger. By flexibly integrating multiple sensors into a single unit, and performing environmental compensation on measurement data, Tongdy’s commercial grade air quality monitors provide comprehensive and reliable environmental monitoring, enabling users with precise insights into air quality for informed decision-making. Tongdy provides indoor air quality monitors, in-duct air quality monitors and outdoor air quality monitors. They are all high-quality products which have been used well in over 100 commercial buildings so far.

Carbon Dioxide Monitor / Controller

Since 2009 until now Tongdy has supplied over 20 series advanced carbon dioxide monitors and controllers tailored for HVAC systems, Building Management Systems (BMS), and green buildings. Tongdy’s carbon dioxide products cover almost all CO2 monitoring and control, with options of temperature, humidity and TVOC. These products deliver professional and intelligent air quality monitoring solutions, especially have strong on-site programmable functins to meet more applications. With the most reliable and accurate data, Tongdy’s CO2 products empower smart building managers to make informed decisions, enhancing both operational efficiency and environmental sustainability.

Ozone / CO / TVOC / PM2.5 Monitors and Controllers

Tongdy’s advanced gas monitoring solutions are designed for targeted, cost-effective detection and control of specific gases. With a focus on a single gas including carbon monoxide, ozone, TVOC and PM2.5, our monitors and controllers are ideally suited for these similar applications, such as ventilation systems, storage warehouses, parking lots, and disinfection processes. From 2012 to 2023, we have developed and sold plentiful single gas products including transmitters, monitors and controllers. We also provide tailored product to meet your specific requirements, providing reliable and precise readings to enhance safety and efficiency of your systems.

Temperature and Humidity Controller / Transmitter

Tongdy offers a lot of special temperature and humidity controllers and transmitters for HVAC, BMS systems. VAV room thermostats, floor heating multi-stage controller, dew-proof humidity controller and controllers of temp.&RH with up to 4 relays outputs are provided. In addition to our very diversity range of existing on-wall and in-duct products, we are also skilled in accurately understanding user needs, proposing reasonable solutions, and customizing temperature and humidity products for customers.

Professional and reliable IAQ monitoring enables data-driven decisions

Multi-Sensor Air Quality Monitors

Carbon Dioxide Monitor / Controller

Ozone / CO / TVOC / PM2.5 Monitors and Controllers

Temperature and Humidity Controller / Transmitter

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  • Indoor Air Quality Monitor in Commercial Grade

    Indoor Air Quality Monitor in Commercial Grade

    PM2.5/ PM10/CO2/TVOC/HCHO/Temp./Humi
    Wall mounting/Ceiling mounting
    Commercial grade
    RS485/Wi-Fi/RJ45/4G options
    12~36VDC or 100~240VAC power supply
    Three-color light ring for a selectable primary pollutants
    Built in environment compensation algorithm
    RESET, CE/FCC /ICES /ROHS/Reach certificates
    Compliant with WELL V2 and LEED V4

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  • PMD

    PMD

    Professional in-duct air quality monitor
    PM2.5/ PM10/CO2/TVOC/Temperature/Humidity/CO /Ozone
    RS485/Wi-Fi/RJ45/4G/LoraWAN is optional
    12~26VDC, 100~240VAC, PoE selectable power supply
    Built in environment compensation algorithm
    Unique pitot and dual compartment design
    RESET, CE/FCC /ICES /ROHS/Reach certificates
    Compliant with WELL V2 and LEED V4

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  • In-wall or On-wall Air Quality Monior with Data Logger

    In-wall or On-wall Air Quality Monior with Data Logger

    Flexible measurement and communication options, covering almost all indoor space needs
    Commercial grade with In-wall or on-wall mounting
    PM2.5/PM10/TVOC/CO2/Temp./Humi
    CO/HCHO/Light/Noise is optional
    Built in environment compensation algorithm
    Data logger with BlueTooth downlaod
    RS485/Wi-Fi/RJ45/LoraWAN is optional
    Compliant with WELL V2 and LEED V4

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  • Carbon Dioxide Monitor and Alarm

    Carbon Dioxide Monitor and Alarm

    CO2/Temp.& RH monitor and alarm
    Wall mounting or desktop placement
    3-color backlight display for three CO2 scales
    Buzzle alarm available
    Optional on/off output and RS485 communication
    power supply: 24VAC/VDC, 100~240VAC, DC power adaptor

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  • CO2 Monitor and Controller in Temp.& RH or VOC Option

    CO2 Monitor and Controller in Temp.& RH or VOC Option

    CO2 monitor and controller with temperature and humidity or VOC’s options
    3 backlight display for three CO2 scales
    1xAnalog outputs with linear outputs or PID control outputs
    Up to 3xrelay outputs
    RS485 interface
    Powerful on-site setting function to meet different project needs

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  • NDIR CO2 Gas Sensor with 6 LED Lights

    NDIR CO2 Gas Sensor with 6 LED Lights

    High cost-effectiveness, compact and consice
    CO2 sensor with self-calibration and 15 years long-life
    Optional 6 LED lights indicate six scales of CO2
    0~10V/4~20mA output
    RS485 interface with Modbus RTU ptotocol
    Wall mounting

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  • Ozone Gas Monitor Controller with Alarm

    Ozone Gas Monitor Controller with Alarm

    Ozone and Temp.& RH monitoring
    1xanalog output and 1xrelay outputs
    Optional RS485 interface
    3-color backlight display three scales of ozone gas
    Can set the control mode and method
    Zero point calibration and replaceable ozone sensor design

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  • Carbon Monoxide Monitor

    Carbon Monoxide Monitor

    Carbon monoxide monitor and controller with T & RH
    Sturdy shell and cost-effective
    1xanalog linear output and 2xrelay outputs
    Optional RS485 interface and availalbel buzzer alarm
    Zero point calibration and replaceable CO sensor design

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  • Carbon Monoxide Monitor and Controller

    Carbon Monoxide Monitor and Controller

    Carbon monoxide with Temp.& RH
    1x0-10V / 4-20mA linear output, 2xrelay outputs
    Optional RS485 interface
    Zero point calibration and replaceable CO sensor design
    Powerful on-site setting function to meet more applications

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  • Temperature and Humidity Controller OEM

    Temperature and Humidity Controller OEM

    Powerful Temp.& RH controller
    Up to three relay outputs
    RS485 interface with Modbus RTU
    Provided parameter settings to meet more applications
    External RH&Temp. Sensor is option

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  • Room Thermostat VAV

    Room Thermostat VAV

    VAV room thermostat with large LCD
    1~2 PID outputs to control VAV terminals
    1~2 stage electric aux. heater control
    Optional RS485 interface
    Built in rich setting options to meet different application systems

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  • Temperature and Humidity Monitor Controller

    Temperature and Humidity Monitor Controller

    Temperature and humidity controller
    External sensing probe design
    Three types of mounting: on wall/in-duct/sensor split
    Two dry contact outputs and optional Modbus RS485
    Provides plug and play model
    Strong presetting function

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100+

Products

32+

Patents

58+

Countries

200+

Projects

Our Certificate

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  • 20+ Years of Focus and Experience

    Collaborating and compliance with Green Building standards Having a reputation for high-quality products and professional service of experience.

  • 100+ Monitoring and Control Products

    Supply more than 100+ monitor/controller of CO2 , other single gases, multi-sensor etc. for HVAC, BMS, green buildings

  • Reliable and Accurate Data

    Empower smart building managers with a solid decision-making foundation

  • Tailored to Specific Need

    Flexible Hardware design for your targeted, cost-effective gas detection and control.Technical accumulation+professional communication+fast delivery, that's the most satisfactory customized service for customers

About Tongdy

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.

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