Bunyu Island is one of the districts in Bulungan Regency and has abundant natural resources, thus making it much ogled by large mining companies to extract and process these natural resources. However, it may change the air quality around the mining area to be poor. This research developed a device that had an electronic sensor as an input device, a NodeMCU ESP8266 microcontroller as a process device, and Blynk Application viewer as an output device. This research was carried out in two stages of testing, namely the GP2Y1010AU0F sensor and the Blynk Application software. In sensor testing, it was done by testing the tool error and continuing to test the voltage using 3 samples in the form of smoke, paper ash, and dust to test the voltage against dust density. In the error test, the result were nit too large, namely 1.43% and 1.67% of the error value, and in the stress test, different results were obtained in the sample test according to the density of each sample. While at the stage of testing the Blynk Application software, it was carried out indoors and outdoors. In software testing good results were obtained where the Blynk application displayed a notification when the read dust was above the threshold.