The quality of the air we breathe indoor (Indoor Air Quality, IAQ) is typically defined by the air chemical or gas composition and particulates. The sensors available today for sensing the gas composition of IAQ have many features and options.

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There is a wide application base for IAQ sensing with the most common being the regulation of HVAC ventilation systems for lower energy cost. Using an IAQ controller to signal a demand-control-ventilation system will result in a metered volume of fresh air, providing an acceptable air quality at lower cost. IAQ control is also useful for hydroponics and storing food.

Typical applications of IAQ sensors include;

• HVAC – ventilation control, schools, hospitals, airports, hotels, public places
• Agriculture - seed culture, greenhouses, hydroponics, seed cultivation
• Food Industry - storing vegetables, kitchens, restaurants
• Industrial, Lab and Medical

Wall and duct mounted IAQ sensors have progressed significantly over the past decade. In addition to the traditional control of temperature and humidity, commercially available IAQ sensors will now detect;

CO - carbon monoxide
CO2 - carbon dioxide
VOC - volatile organic compounds
O3 - ozone

Configurations are available ranging from a basic transmitting sensor that outputs an analog signal to a full feature sensor with audible alarm, RS-485 communication and multicolor backlit LCD readout indicating gas level. Units are even available with a hand held remote control for setup and operation. The following are examples of IAQ sensor configurations.

CO2 Sensor
• CO2 Sensing
• On/Off and Analog Signal Output
• (6) LEDs indication CO2 Level
• Touch Button Control
• RS-485 Communications
• Wall Mountable

CO2 Sensor
• CO2, Humidity and Temperature
• Multicolor Backlit LCD based on CO2 level
• On/Off or Analog Signal Output
• RS-485 Communications
• Desk and Wall Mountable
• Hand Held Remote for Programming and Setup

CO2 Sensor
• CO2, Humidity and Temperature
• Multicolor Backlit LCD based on CO2 level
• Analog Signal Output
• RS-485 Communications
• Wall Mountable
 

CO2 Sensor
• Internal Air Pump
• Programmable Pump Schedule
• On/Off or Analog Signal Output
• Wall Mountable

CO2 Sensor
• Light Detector
• Analog Signal Output
• Wall Mountable

CO2 Sensor
• CO2, Humidity and Temperature
• Split Location with RS 485 Communications
• On/Off or Analog Signal Output
• Wall Mountable

CO2 Sensor
• CO2, Humidity and Temperature
• Duct Mountable
• Analog Signal Output
• RS-485 Communications
• Replaceable Filter

CO Sensor
• Multicolor Backlit LCD
• CO, Humidity, Temperature
• Desk and Wall Mountable
• On/Off or Analog Signal Output
• RS-485 Communications
• Hand Held Remote for Programming and Setup

VOC Sensor
• Multicolor Backlit LCD
• VOC, Humidity, Temperature
• Analog Signal Output
• RS-485 Communications
• Desk and Wall Mountable
• Hand Held Remote for Programming and Setup

O3 Sensor
• O3
• On/Off Signal Output
• (6) LED Indicating O3 Level
• RS-485 Communications
 

About Intellisenc www.intellisenc.com
Intellisenc is a factory authorized distributor representing Tongdy Control Technology. Our specialty is indoor-air-quality with sensors, detectors and controls for temperature, humidity, carbon dioxide, carbon monoxide, ozone and volatile organic compounds. We accommodate standard configurations in low and high volume as well as custom and OEM designs. Our product offering ranges from basic transmitting sensors that output an analog signal to full feature sensors with;
Audible Alarm
PID Control Output
RS-485 communication
Multicolor backlit LCD readout indicating gas level
Units are available with push button a hand held remote control for setup and operation.

About Tongdy Control Technology  www.tongdy.com
Tongdy Control Technology was founded in 1999, and is located in Beijing, China. Tongdy is a provider of HVAC digital thermostats, humidity controls and IAQ detectors and controllers.  Tongdy's experience in development and design, gained while providing the global market, position it to be a viable supplier of advanced products and solutions.  Legacy products lines are sensors and controls for the HVAC market and IAQ products. HVAC products include digital thermostats, digital hygrostats , temperature and humidity transmitters and Modbus or BacNet commercial thermostats. IAQ products include gas detectors, transmitters, alarms, and controls for carbon dioxide, carbon monoxide, ozone and VOCs. Tongdy also provides custom products to meet special requirements of customers with quick response and good quality.  Tongdy's products are distinguished by high quality at a competitive price with a broad sensor and control offering. Tongdy's mission is to utilize their vast experience to provide practical solutions in air sensing.

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