The ifm efector SN Series Flow Switch offers five distinct control monitor models for flow sensors, each designed for specific industrial applications and safety requirements. The SN2301/2302 is for hazardous area applications and the SN 150/151/152 is for standard industrial monitoring with enhanced functionality.

The SN2302 (110VAC) and SN2301 (230VAC) are specialized for hazardous area applications requiring ATEX/IECEx certification with intrinsic safety ratings. These models provide basic flow and wire monitoring only, featuring larger housings (78×45×120mm) with screw terminal connections and fixed 30-second power-on delays. They are essential for explosive atmosphere environments where intrinsically safe equipment is mandatory, with the choice between models determined solely by regional voltage requirements.

The SN0150, SN0151, SN0152 offer comprehensive monitoring capabilities including flow, temperature, and wire monitoring. These compact units (100×25×103.5mm) feature COMBICON connectors and adjustable power-on delays (10-80 seconds). The SN0150 energizes its relay when temperature is exceeded (alarm function), while SN0151 and SN0152 de-energize when temperature is exceeded (safety cutoff function).