Customers often ask how sensitive the DBX2 Barograph is to atmospheric changes. The best way to describe this is to consider that air has mass. In fact the average air pressure at sea level is 14.7 psi. This means that a 1" x 1" column of air from the top of the atmosphere to the ground at sea level weights on average around 14.7 pounds. The DBX2 Barograph can sense a weight change in that column in a mere 12 inches of elevation. You can actually demonstrate this by taking a realtime reading with your DBX2 Barograph and then picking up the unit and take another reading and you will see a drop in pressure on the display.

The DBX2 can lock on any one screen or can rotate throught each screen every 7 seconds. The first screen shows the current pressure information. The second screen shows the one day graph. The third screen shows the one week graph. The fourth screen shows all units of pressures at once. The fifth screen shows current settings and the sixth screen shows unit information.

The DBX2 Barograph is constructed of aircraft grade anodized aluminum, which is precision cnc milled. The case itself is impervious to weather. The DBX2 Barograph System Sensor Board (SSB) is coated for protection against moderate humidity. The DBX2 Barograph has 5 buttons that control the setup and function of the unit.

Here are some samples DBX2 barograph graphs and their interpretations:

 NIST traceable units

All units are Nist tested. The NIST testing range is from 26.00 - 31.00 inhg, 880 - 1050mb/hPa and 660 - 787mmhg. Accuracy may vary outside this range. Each unit is provided with a NIST Traceable Certificate that is shipped with the DBX2.

 DBX2 Barograph Advantages over Mechanical Aneroid barographs

If you have ever checked the price of a Aneroid barograph you know it can set you back over $1,000.00. The user is required to buy charts and pens. The user must change the paper chart once a week. Its hard for the user to see the actual reading. Aneroid barographs generaly only operate below an elevation of 2500 foot. Units need calibration over time. And Aneroid cells need to be replaced over time. These units are not sea worthy and can not be used on marine crafts.

 DBX2 Barograph Advantages over Mechanical Aneroid barometers

Standard Aneroid barometers only show the current reading. Its hard to track pressure changes on a standard barometer. The user has to constantly set the barometer marking needle. Its hard to detect small changes in pressure movement. Aneroid barometer cells lose accuracy over time. Aneroid barometer have elevation limitations.

 Barograph Pressure Conversions:

Pressure Unit convert to this Unit
inHg mb = 33.8639 x inHg
mb inHg = 0.0295300 x mb
inHg kPa = 3.38639 x ( inHg/10)
kPa inHg = 0.295300 x kPa
inHg psi = 0.491130 x inHg
psi inHg = 2.03602 x psi
inHg mmHg = 25.4 x inHg
mmHg inHg = 0.03937008 x mmHg

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