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1、前言最近,有关方面从经济形势和安全角度考虑,正在对气动仪表重新作出评价。以往人们总认为电子仪表是“万能的”,如今却再次考虑采用气动仪表装置,其背景除了应从经济性、安全性予以评论外,还必须看到经过不懈的努力,气动仪表已经有了改进这样一个现实。气动仪表与电动仪表相比,在防爆、可靠性等方面具有天赋的优点。相反,气压信号管
1, Foreword Recently, the relevant parties are reevaluating the pneumatic instruments from the perspective of the economic situation and safety. In the past, people always thought that electronic instruments were “omnipotent”. Now they are again considering the use of pneumatic instrument devices. The background should be commented on in terms of economy and safety. It must also be seen that after years of unremitting efforts, aerodynamic instruments have been improved. A reality. Pneumatic instruments and electric instruments compared to the explosion-proof, reliability and other aspects of natural advantages. On the contrary, the pressure signal tube