<![CDATA[Weather be a very important thing to observe. One of the weather paramaters is air pressure. The air pressure on a surface is the force given to a surface or area by the air column above the surface. This research designed an air pressure gauge using DT-Sense Barometric Pressure which used to measure the value of the air pressure based of Internet Of Things with measurement result displayed on a smartphone. For data retrieval techniques were done by directly and indirectly. The amount that carried out directly is air pressure, while the indirect amount is the precision and the accuracy of air pressure measurements. The result of this research was the system performance specifications consist of mechanical systems that were supported by electronic systems. The precision measurements were done by comparing the results from Digital Barometer with the air pressure gauge that has been made. The percentage of average erros that obtained was 0.02965%, the relative precision average on the system was 0.99955, and the precision percentage of the tool was very good at 99.995%. The accuracy measurements were done by measuring the air pressure under the same conditions. The measurements were done by 10 times with reading on a constant standard measuring tools. The average accuracy of the system was 0.99 with an average standard deviation of 0.7 and relative errors average 0.0098%.]]>
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