Tongdy Sensing Technology

Tongdy

Tongdy is a global leader in indoor air quality monitoring and control solutions for commercial, institutional, residential and industrial environments.

The company brings more than 16 years of specialized experience to the development of accurate, reliable instruments for measuring and managing indoor environmental conditions. Their extensive product portfolio includes air quality monitors, carbon dioxide transmitters, particle sensors, ozone monitors and intelligent control systems designed for building automation and ventilation management. With it's wide product lineup and installations in more than 38 countries, Tongdy supports healthier, safer and more energy-efficient buildings around the world. Its products combine precise sensing technology, dependable performance and flexible integration capabilities to help facility managers, engineers and building professionals monitor air quality, optimize ventilation and support sustainable indoor environments.

PGX Super Indoor Environment Monitor 4

16 products

AC Adapter - Sper Scientific Direct

Tongdy

PA-001

AC Adapter for Wall Mount Ozone Monitor

$25.92 USD
TONGDY Ozone Monitor with Digital Display

Tongdy

G09-O3-3111-B50

Wall Mount Ozone Monitor

$939.00 USD
Wall Mount Carbon Dioxide Detector/Transmitter with Temperature and RH

Tongdy

G01-CO2-B30C-301-02

Wall Mount Carbon Dioxide Monitor with Temperature and RH

$414.00 USD
White air quality monitor by Tongdy with a digital display showing indoor readings on a white stand.

Tongdy

G02-VOC-B332C

Desktop TVOC Indoor Air Quality Monitor

$261.00 USD
White carbon monoxide monitor and controller by Tongdy with an LCD screen and setting buttons.

Tongdy

TSP-CO-D010

Carbon Monoxide Monitor and Controller

From $279.00 USD
Wall Mount Temperature + RH Transmitter

Tongdy

F2000TSM-TH-M201

Wall Mount Temperature + RH Transmitter

$154.00 USD
Desktop CO2 Monitor + Controller

Tongdy

G01-CO2-B332C

Desktop CO2 Monitor and Alarm

$384.00 USD
Wall Mount Air Quality Monitor

Tongdy

MSD-1818C

Wall Mount Air Quality Monitor

$1,035.00 USD
Wall Mount CO Monitor with LCD

Tongdy

GX-CO-111

Wall Mount CO Monitor with LCD

$327.00 USD
White carbon monoxide monitor by Tongdy with vertical recessed stripe and green indicator light.

Tongdy

TSP-CO-B100

Carbon Monoxide Monitor

$240.00 USD
Outdoor air quality monitor by Tongdy in white plastic with a louvered structure, mounted on a pole.

Tongdy

TF91-11111

Outdoor Air Quality Monitor

$6,297.50 USD
PGX Super Indoor Environment Monitor

Tongdy

PGX-018C

PGX Super Indoor Environment Monitor

$1,212.50 USD
In-duct mount air quality monitor by Tongdy, featuring an orange and black casing with a silver mounting bracket.

Tongdy

PMD-1818C

In-Duct Mount Air Quality Monitor

$2,322.50 USD
White PM 2.5 Particulate Monitor by Tongdy displaying air quality levels with a connected black power cord.

Tongdy

G03-PM2.5-300T

Desktop PM 2.5 Particulate Monitor

$276.00 USD
CO2 transmitter/monitor with digital display

Tongdy

TG9-108-02

In-Duct Mount CO2 Transmitter

$354.00 USD
Wall mount CO2 transmitter by Tongdy, with a gray border, rectangular shape, and green light indicator at the bottom.

Tongdy

TSP-CO2-B100

Wall Mount CO2 Transmitter

$345.00 USD

About Tongdy Sensing Technology

Tongdy is a worldwide leader in indoor air quality monitoring and HVAC control sensing. Based in China with over 16 years of experience, Tongdy operates 25 product lines and has deployed IAQ solutions across global projects in more than 38 countries. Tongdy delivers reliable, innovative sensors that help create healthier, more sustainable indoor environments.

Indoor Air Quality Sensors for Building Automation

Tongdy IAQ sensors monitor CO₂, VOCs, PM2.5, temperature, humidity, and other critical parameters used by building management systems to optimize ventilation, energy efficiency, and occupant comfort. Designed for integration into BAS/HVAC systems, Tongdy sensors provide the real-time data needed for demand-controlled ventilation and green building compliance.

Key Product Families

  • CO₂ Sensors NDIR-based carbon dioxide sensors for demand-controlled ventilation.
  • VOC & Multi-Gas Sensors Detection of volatile organic compounds and combined air quality parameters.
  • PM2.5 Particulate Sensors Fine particle monitoring for indoor air quality assessment.
  • Temperature & Humidity Sensors Precise ambient condition monitoring for HVAC control.


Why Buy Tongdy from Sper Scientific Direct

Sper Scientific Direct is an authorized US distributor for Tongdy Sensing Technology, providing US-based support and fast domestic shipping on IAQ sensors and transmitters.