Description: In the paper the measurement uncertainty estimation of the drilling fluid density with density meter, created on the basis aerometric measurement method is made. The analysis of the measurement uncertainty sources is executed, the measurement equation is obtained and the formula for influencing factors is derived. The peculiarity of this type of density meters is the nonlinear static characteristic of conversion, which linearization requires a specific approach. As a result, the additional sources of measurement uncertainty, which required of evaluation and accounting is appeared.
Keywords: measurement uncertainty, the drilling fluid density meter, aerometric method, measurement equation, sensitivity coefficients