我厂化工生产过程的负压(-760mmHg～0)测量,设计时选用DBY型负压变送器,由于工艺介质的酸气腐蚀,致使短期损坏。为此,我们设计了一种结构简单,易于自制的负压变送器。这种变送器测量容室采用不锈钢材料,利用差动变压器位移平衡原理制作。仪表结构简单,动态性能好,功耗小,工作可靠。从使用实践看,本仪表性能与DBY型变送 I plant chemical production process of negative pressure (-760mmHg ~ 0) measurement, the design used DBY-type negative pressure transmitter, due to acid corrosion of process media, resulting in short-term damage. To this end, we designed a simple structure, easy self-made negative pressure transmitter. This transmitter measuring chamber stainless steel material, the use of differential transformer displacement balance principle. Instrument structure is simple, dynamic performance, low power consumption, reliable work. From the use of practice, the instrument performance and DBY-type transmission