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Product description 3 Product description 3.1 Configuration Scope of delivery The scope of delivery encompasses: l l Components OPTISWITCH 3300 C level sensor Documentation - this operating instructions manual - Supplementary instructions manual "Plug connector for level sensors" - optional - Ex specific safety instructions (with Ex versions), if necessary further certificates OPTISWITCH 3300 C consists of the following components: l l l Housing cover Housing with electronics process fitting with tuning fork 1 2 3 Fig. 1 2 3 1: OPTISWITCH 3300 C - with plastic housing Housing cover Housing with electronics Process fitting 31358-EN-051207 3.2 Principle of operation Area of application OPTISWITCH 3300 C is a level sensor with tuning fork for level detection. OPTISWITCH 3300 C - with NAMUR output 7