Climatic factors are an abiotic component that determines ecosystem characteristics. Rapid development activities require capable observation instruments and able to provide a variety of weather data to analyze their impact on the environment. This study aims to develop an instrument for measuring temperature and humidity as an essential component of climatic factors based on the DHT11-Arduino microsensor. Tests carried out at 30 scattered points in Cikarang Raya, Bekasi Regency, West Java. Data from the DHT11-Arduino microsensor measurement results are compared with the results of ground measurement and satellite imageries data in the same period through statistical tests. This research shows the DHT11-Arduino microsensor is able to measure temperature and humidity in Cikarang Raya with a significance level of 0.05-0.01. The correlation between microsensor and the comparative data in observing the temperature reached 0.934, while the humidity reached 0.687. The distribution of temperature and humidity of the instruments shows a similar pattern. Using DHT11-Arduino microsensor to observe temperature and humidity has proven to be feasible and able developed to obtain climatic factors data as part of sustainable ecosystem management.