Measuring psychosocial phenomena, such as democracy, is challenging due to the influence of subjective perceptions and difficult-to-assess variables. It is crucial for democracy assessments to produce reliable and comparable results, as they play a vital role in analysing political realities and influencing decision-making at national and international levels. While essential elements of the Measurement Science are manifest throughout the discussions on democracy measurement, important aspects must be addressed to align the approaches used in this field with fundamental metrology precepts. Recent studies have suggested incorporating the psychometric approach known as the Rasch model into the metrological system associated with each attribute as a potential solution to the challenges of providing comparable and reliable measures of psychosocial traits. However, this approach has yet to be explored in democracy measurement. This study applies the Rasch model to the democracy measuring system from the Varieties of Democracy project (V-Dem) and their recently incorporated anchoring vignettes database. It analyses coders responses to the indicators constituting the V-Dem survey on Deliberation. The proposed method evaluates the system s performance, considering the coders as the sensing element and the indicators as the measuring system s structure. Sources of measurement uncertainty are discussed within the measurement model. The study reveals items associated with critical demands for revision based on multiple parameters, including differential item functioning based on coders continent of origin and secondary dimensions affecting the sensor. Addressing these elements can contribute to enhancing the reliability of democracy assessment and advancing political science research.