Pepperl+Fuchs inductive proximity sensors have many models. The following introduces some common series and models: ### NBB series of Pepperl+Fuchs inductive proximity sensors: - **NBB 0,8-4M25-E0**: Normally open, NPN output, DC, flush installation, 3-wire, stainless steel housing, IP67 protection level. - **NBB 0,8-4M25-E2**: Normally open, PNP output, DC, flush installation, 3-wire, stainless steel housing, IP67 protection level. - **NBB 1,5-5GM25-E2**: Normally open, PNP output, DC, flush installation, 3-wire, M5 thread, stainless steel housing, IP67 protection level. ### NBN series of Pepperl+Fuchs inductive proximity sensors: - **NBN40-L2-E2-V1**: With DC output, 2-wire or 3-wire optional, non-flush installation, long detection distance, LED status indication, and multiple connection methods. - **NBN8-18GM50-E2-V1**: For detecting metal objects, DC power supply, 3-wire PNP output, flush or non-flush installation, cylindrical housing, IP67 protection level. - **NBN5-F7-E2**: Normally open, PNP output, DC, rectangular housing, suitable for installation locations with compact space, IP67 protection level. Other series: - **NMB series**: "metal face" product series, with ferrous metals detection (fe) version and non-ferrous metals detection (nfe) version, suitable for occasions with high requirements for sensor robustness, such as machine tools or metal processing environments. - **NAMUR output series**: The product model has "N", low voltage and current characteristics, can be used in explosive environments, and must be powered by a corresponding isolation amplifier to ensure intrinsic safety. In addition, there are many models such as NBN4-12GM50-E2-V1, NJ4-12GM40-E2, NJ8-18GM-N, etc. Different models differ in detection distance, installation method, output type, protection level, etc. to meet the needs of various industrial application scenarios.