RSF88YP is a compact external level switch designed for mounting through tank walls via ½"NPT thread without requiring internal tank access. The unit features polypropylene construction with UL approval (File No. E171218) and operates over a temperature range of -20°C to +100°C (-4°F to +212°F). It includes an M12 circular connector socket for reliable electrical connection and supports both make-on-rise (N/O) and make-on-fall (N/C) switching actions by simple 180° rotation. With a maximum switching power of 25VA at 240V AC or 120V DC, and a maximum switching current of 0.6A, the RSF88YP is ideal for monitoring diesel generator fuel levels, hydraulic oil, and gearbox oil levels in industrial and mobile applications.