随着我国四个现代化的进展,炼油、化工、化纤、食品、冶金、制药、电子等工业大大发展起来,无论引进装置或国内设计装置,均需要绝对微压的测量及控制。例如化纤工业中的聚酯装置要检测及控制聚合釜的真空度,某些蒸馏塔要在低压下运行等等。这是一种低真空,用绝对微压变送器来检测,因此绝对微压变送器的制造、校验、使用、维修都提到日程上来了。所谓绝对微压变送器是指在0～50mmHg压力范围内的绝压变送器。在压力极低 With the progress of the four modernizations in our country, the refining, chemical, chemical fiber, food, metallurgy, pharmaceutical, electronics and other industries have greatly developed. Both the introduction of devices and the design of domestic devices require absolute micro-pressure measurement and control. For example, the chemical industry polyester device to detect and control the polymerization vessel vacuum, some distillation tower to run at low pressure and so on. This is a low vacuum, with absolute micro-pressure transmitter to detect, so the absolute micro-pressure transmitter manufacturing, calibration, use, maintenance are mentioned on the agenda up. The so-called absolute micro-pressure transmitter is in the pressure range of 0 ~ 50mmHg absolute pressure transmitter. Very low pressure