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Know - How of Gas Monitor |
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PC Connection |
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| Q: |
Can we connect the CO2 monitor to PC directly? |
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No, we cannot connect the CO2 monitor to PC directly. It needs a special HUB (optional, to be charged) |
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and one demo program which can be downloaded from our website. |
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For ZG01 modules, users can transfer the data to the PC through connecting the ZGhub with RS232 |
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interface and installing the ZGview software. The operation instruction can be found from ZyAura |
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website. http://www.zyaura.com/support/default.htm. |
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For the ZGhub, please consultant with our Sales Rep. |
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For ZGw08, you can only use RS232 cable to transfer data to PC. |
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Operating Environment |
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| Q: |
Do you think that the module under hyperbaric environment (measurement of CO2 concentration in |
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ambient with the range of 1-10 bar) could be damaged by pressure? |
| A: |
If the sensor (thermopile from PerkinElmer) can stand such low pressure, our module can work well. But |
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there is no pressure sensor in our ZG module and such large pressure change will affect the CO2 |
| reading greatly. If you need accurate CO2 reading, you must compensate the CO2 reading by the actual |
| air pressure. For small change of air pressure, its pressure dependence: will be 0.13% of reading per |
| mmHg, similar with most of CO2 monitor in NDIR way. |
| Q: |
Does the CO2 module work in humidity higher than 95%HR? |
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The CO2 sensor cannot work under condensation water condition because the water will absorb the |
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infrared which affects the reading of CO2; But for water vapor (0~100% RH), its has minor affect on the |
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accuracy. We have no enough experiment data about this. |
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Applications |
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| Q: |
CO2 Application for Home? |
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The CO2 is colorless, odorless gas which normally exists. Nowadays, people often close the window to |
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avoid noise and enjoy the comfort living and working environment provided by Heat, Ventilation and Air- |
| Conditioning (HVAC) systems. The CO2 monitor can display the current ventilation rate of the room. The |
| over-ventilation can be reduced and the energy can be saved. When the window is closed for a long time, |
| it would cause the indoor CO2 concentration far higher than the outdoor average. The high level CO2 |
| concentration will lead to the bad air quality in the house. The family member will feel uncomfortable. |
| Q: |
The American OSHA (Occupational Safety & Health Administration) & ASHRAE (American Society of : |
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Heating, Refrigerating and Air- Conditioning) has recommended the CO2 concentration level as below |
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- 350 ~ 450 ppm：Healthy,normal outside level.
- 450 ~ 700 ppm：Acceptable level.
- 700 ~ 1000 ppm：Complaints of stiffness and odors.
- 1000 ~ 2500 ppm：General drowsiness.
- 2500 ~ 5000 ppm：Adverse health effects expected
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Patents |
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| Q: |
Do you have the patent conflicts in the US for the chamber design with the Wong's invention? |
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Our design is different from that patent. The filter on the AirCell is in different size. |
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