Box-type differential pressure densimeter

The utility model provides a box type differential pressure densimeter which comprises a buffer box body, the upper end and the lower end of the front surface of the buffer box body are fixedly connected with pressure sensors, and the front surface of the pressure sensor at the lower end is fixedly connected with a differential pressure transmitter; according to the utility model, the terminal instrument, the PLC controller and the display are arranged, a pressure intensity value detected by the pressure sensor and the differential pressure transmitter is matched and converted into a linear voltage signal, and a numerical value obtained through the terminal instrument and the PLC controller is converted into 4-20MA current to be output and displayed on the display; therefore, a user can visually check the density of the suspension liquid in the inner cavity of the buffer box body, and the problems that in the prior art, a radioactive isotope densimeter can serve as a radioactive source, pollutes the surroundi