EMD密度控制器的操作原理：

使用两片隔膜，使得气体的密度变化只取决于气体是否有泄漏，而与温度、海拔因素无关

这一设计称为温度补偿或海拔补偿，补偿范围取决于客户需要。
当气体密度达到设定阈值 时，微动开关会自动打开，并随即：
A. 激活保护系统
B. 标明系统内的异常工作区域

Documentation of Density controllers
Code
Title Size in Kbytes Date

GDCxyz Gas Density Controller 43907040 1558 10-01-12  View Online
GDCxyz
Gas Density Controller 43907750 732 04-11-08  View Online
GDC201 Gas Density Controller 754 02-04-12  View Online
GDC3
Gas Density Controller 1331 19-03-09  View Online
GDC302
Gas Density Controller 1105 21-03-12  View Online
GDC304-305
Gas Density Controller 2371 25-02-11  View Online
GDC306-307-308
Gas Density Controller 949 23-03-12  View Online
GDC310-311-312
Gas Density Controller 1054 16-01-11  View Online
GDC401
Gas Density Controller 711 04-11-08  View Online
GDM3XX Gas Density Monitor 120409-05-12 View Online
GMD1
Density switch 318 05-11-08  View Online
GMD2
Density switch 744 05-11-08  View Online
GMDX301
Density switch 208 11-11-11  View Online
GMDX95
Density controllers 381 11-06-08  View Online
DMDXXX/X
Density monitor 1729 30-10-07  View Online
DSEXX
Gas Density Controller 43908300 1018 29-03-12  View Online
DSEXX
Gas Density Controller 43908310 1032 29-03-12  View Online

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  Last update :05-08-11
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