Customers often ask how sensitive the DBX1 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 DBX1 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 DBX1 Barograph and then picking up the unit and take another reading and you will see a drop in pressure on the display.

The DBX1 display rotates every 5 seconds. The first display shows the (1) day information which includes the current pressure reading, direction indicator, tendency forcast, audible icon state, the one day high and low pressure and the 1 and 3 hour pressure change. The next display shows the (1) day graph via a 20 column x 24 position display. The (5) day information is shown next which includes the current pressure reading, direction indicator, tendency forcast, audible icon state, the five day high and low pressure and the 6 and 12 hour pressure change. The last display shows the (5) day graph via a 20 column x 24 position display.

The DBX1 Barograph samples the Barometric Pressure every 5 minutes. And the user has the ability to take a realtime reading anytime. If the DBX1 Barograph detects a sharp rise or drop in pressure, or a graphical trend, the unit will display an appropriate warning message and warn you with an audible alert. The audible alert can be turned on or off at anytime.

The DBX1 Barograph is constructed of aircraft grade black anodized aluminum, which is precision cnc milled. The case itself is impervious to weather. The DBX1 Barograph System Sensor Board (SSB) is coated for protection against moderate humidity. The left side of the DBX1 Barograph has 4 buttons that control the setup and function of the unit. The right side has access to the battery compartment which holds 4 AA batteries.

Here are some samples DBX1 barograph graphs and their interpretations:

 We offer NIST traceable units

Whether you're purchasing a "STANDARD" or a "NIST TRACEABLE" unit, you are receiving an identical unit. The only difference is that you are paying for an outside laboratory to test your unit against a NIST CERTIFIED PRESSURE TRANSDUCER to prove its performance. The NIST testing range is from 26.00 - 31.00 inhg, 880 - 1050mb/hPa and 660 - 787mmhg. Accuracy may vary outside this range. They will produce a performance graph and a NIST Traceable Certificate that is shipped with the DBX1.

 DBX1 Barograph Advantages over 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.

 DBX1 Barograph Advantages over standard 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

      Contact:    sales@digitalbarograph.com         Main Barograph Site:    www.digitalbarograph.com          Copyright © 2009, ASI LLC