The DW weighing scale is a high-precision static electronic scale with a measurement accuracy of one thousandth. It comes with a calibration device that can be calibrated at the right time. The weighing bucket adopts the bottom double gate switch as the discharge port, and adopts self-lubricating oil-free bearing articulation. The driving device adopts double cylinder pneumatic mode and external type limit. The inner wall material of the bucket is smooth, wear-resistant, anti-corrosive, non-contaminating and non-stick sample. The equipment can provide a certificate of qualification with the national statutory qualification.