Home > Products > Desktop CO2 monitor > ZGm05  
  ZGkb301 / ZGkb201p
  ZG9 series
  ZGm05 SERIES - ZGm053U  
3 LED Display:
 < 800 ppm  800~1200 ppm  > 1200 ppm
General Introduction
Indoor Air Quality (IAQ) is measure for the quality of air in interiors, the comfortable indoor environmental quality can make people feel fresh, work efficiency and good for the health. The CO2 concentration is the important factor of good indoor air quality. People breath in oxygen and breath out CO2, nowadays people often close the windows to avoid noise and enjoy the comfort living and working environment provided by air-conditioning systems, which results in the fact that the indoor concentration of CO2 is far higher than outdoor average. With the high CO2 concentration and non- proper ventilation, people will feel headaches, dull, drowsiness, lose of concentration and correspond to the high levels of dust, chemicals and bacteria in the air.
Three different LED display shows the current Indoor Air Quality
It uses dual beam NDIR technology to improve the long term stability
A mini desktop CO2 Monitor
Communication Interface: Windows XP, Windows 7
LED Display
  1. LCD Display
  2 .Calibration Gas Entry
  3. Power Inlet
  4. Ventilation Slots
  5.Red LED Display  (>1200ppm)(for HVAC)
  6. Yellow LED Display
(800-1200ppm)(for HVAC)
  7. Green LED Display (<800ppm)(for HVAC)

This CO2 monitor is for home use, not suitable for certifying the test results.
Please use standard USB power (such as USB port from PC, port from general AC adapter), otherwise
    the device will be damaged.

Readings may be affected if the unit is operated within radio frequency electromagnetic field strength of

  approximately 3 volts per meter, but the performance of the instrument will not be permanently affected.
Warm-Up Time: About 60 seconds
About 60 seconds warm-up time when first time power.
The LCD shows 5 digits in accordance with the order of 5~1 during warm-up.
The device shows the CO2 reading after above 5 digits disappear.
Notes: The display time of Temp and CO2: 15sec, 5 sec.
Connect to PC with data log function
  Firstly, connect the device to PC. Download the software from  and get more details.  
Caring for product
To ensure you receive the maximum benefit from using this product, please observe the follow guidelines.
Cleaning— Disconnect the power before clean. Use a damp cloth, do not use the liquid cleaning agent,
  such as benzene, thinner or aerosols.
Repair----Do not attempt to repair the product or modify the circuitry by yourself. Please contact with the
  local dealer or a qualified repairman if the product needs servicing.
Air diffusion—The ventilation slots on the housing are designed for CO2 diffusion, so these ventilation
  slots should not be blocked.
  Method - Dual Beam NDIR
  Display - LCD   Independent CO2 Temperature readings

Sample Method - Diffusion


CO2 & Temperature Specification:

CO2 Measurement Range 0-3,000 ppm display
Display Resolution 1ppm at 0~1,000ppm; 5ppm at 1,001~2,000ppm;
10ppm at 2,001~3,000ppm
Accuracy 0~2,000ppm: ±100ppm or ±7% of reading, whichever is greater; over 2000ppm: +/-10%
Repeatability ±20 ppm
Temperature Dependence Typ.±0.3% of reading per °C or ±4 ppm per °C, whichever is greater, referenced to 25°C
Response Time About 2 min for 63% of step change
Warm-Up Time About 60 seconds
Zone LED Display Green: <800ppm; Yellow: 800~1200ppm; Red: >1200ppm. 800ppm is the default AL1, 1200ppm is the default AL2
Temperature Temperature Range 0°C to 50°C (32°F to 122°F) display
Display Resolution 0.1°C (0.1°F)
Display Options °C or °F
Accuracy ±1.5°C( ±2°F)
Response Time 20~30min(device must equilibrate with environment)
Operating Conditions Operating Temperature 0°C to 50°C (32°F to 122°F)
Storage Conditions Storage Temperature -10°C to 60°C(14°F to 140°F)
Power Supply Power Supply

USB or 5 VDC AC/DC adapter, which is not included in package (Please use Standard USB power)
DC output range: 5VDC/ 300mA

Communication interface: OS Windows XP , Windows 7
Notes: CO2 monitor Power consumption: peak current is 200mA. Average current is about 20mA
Fault Codes & Troubleshooting Guide
  This section includes a list of Frequently Asked Questions for problems you may encounter with the ZGm053 CO2 Monitor.  
Fault Icon Description of the fault Suggested Actions
The ambient temperature has exceeded the operating temperature range 0°C to 50°C (32°F to 122°F) This error will clear when the temperature returns to the range between 0°C to 50°C (32°F to 122°F).
EEPROM System Problem Please power on ZGm053U again
If the “Err5, Err6” still appears, please contact the Service department for further assistance.
The voltage of USB power is too low, the device does not work

This error will clear when user replaces Standard USB power.

Available Packages
  Dimensions: 116*38*23.8mm
  Weight: 101.2g(including Micro USB Cable)
  One Set Included:
1 CO2 Monitor
1 Micro USB Cable
1 User Manual
1 ColorBox
  One Carton Included:
Q'ty: 100pcs PaperBoxes
ColorBox Size: 145*99*38mm
Carton Size: 520*315*430mm;2.48 CubeFt
  N.W: 14.5kgs
  G.W: 16.0kgs