Sunday, July 21, 2024 11:51:18 PM

Air Quality Monitoring

10 months ago
#3498 Quote
The OmniSense G-7 combines air quality sensors with a OmniSense gateway making it a powerful tool for construction monitoring.  The "bare bones" G-7 comes with temperature and humidity sensing.  Other sensors that can be added "a la carte" include:

Particle Counter
Manometer/Differential pressure
CO2 or CO sensor
Sound Pressure Level meter
VOC sensor (coming soon!)

In construction the G-7 is configured with a particle counter, manometer and SPL meter.  It is then typically placed in the sterile area of the building and is used to monitor the efficacy of containment as well as noise level.  Containment performance is measured both by sampling the air with the particle counter and my monitoring the differential pressure between the sterile space and the containment space.

When temporary heat is used the CO sensor is used for monitoring CO levels.  Note that none of our products are intended to be used for life safety and you should always follow best practices which includes using a local audible CO alarm that is intended for life safety.
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3 months ago
#12901 Quote
particle counter questions:
is there a user manual for the iaq unit?
which port should the small tube be connected to?
should the top be open or shut if the unit is sitting on a table?
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3 months ago
#12904 Quote
David Mason wrote:
particle counter questions:
is there a user manual for the iaq unit?
which port should the small tube be connected to?
should the top be open or shut if the unit is sitting on a table?


Documentation for the G-7 can be found here

Containment monitoring is described here

The top should always be installed.  I believe the real question is "how does the particle counter and CO2 sensor sample the ambient air?".  The answer is that the G-7 enclosure is not airtight and there are constant air movement and air changes between the air inside the enclosure and ambient air outside the enclosure.  These air changes are caused by (1) the particle counter which has a small fan (you have to put your ear up to the box to hear it) that pulls a vacuum on the inside of the box and exhausts air to the outside of the box through small holes on the side pf the enclosure and (2) thermal convection caused by heat generated inside the box.
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