伊玛爆阻旋开关SRE10/SRE20/SRE11/SRE21/SER50/SRE60是防爆型料位开关，伊玛爆阻旋开关SRE10/SRE20/SRE11/SRE21/SER50/SRE60是隔爆型的。
常用型号如下：
SRE11AA00504 SRE11AB00504 SRE11AC00504 SRE11AD00504 SRE11BA00504 SRE11BB00504 SRE11BC00504 SRE11BD00504 SRE11CA00504 SRE11CB00504 SRE11CC00504 SRE11CD00504
SRE10AA00504 SRE10AB00504 SRE10AC00504 SRE10AD00504 SRE10BA00504 SRE10BB00504 SRE10BC00504 SRE10BD00504 SRE10CA00504 SRE10CB00504 SRE10CC00504 SRE10CD00504
SRE20AA00504 SRE20AB00504 SRE20AC00504 SRE20AD00504 SRE20BA00504 SRE20BB00504 SRE20BC00504 SRE20BD00504 SRE20CA00504 SRE20CB00504 SRE20CC00504 SRE20CD00504
SRE21AA00504 SRE21AB00504 SRE21AC00504 SRE21AD00504 SRE21BA00504 SRE21BB00504 SRE21BC00504 SRE21BD00504 SRE21CA00504 SRE21CB00504 SRE21CC00504 SRE21CD00504
SRE50AA00504 SRE50AB00504 SRE50AC00504 SRE50AD00504 SRE50BA00504 SRE50BB00504 SRE50BC00504 SRE50BD00504 SRE50CA00504 SRE50CB00504 SRE50CC00504 SRE50CD00504
SRE60AA00504 SRE60AB00504 SRE60AC00504 SRE60AD00504 SRE60BA00504 SRE60BB00504 SRE60BC00504 SRE60BD00504 SRE60CA00504 SRE60CB00504 SRE60CC00504 SRE60CD00504
技术参数如下：
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