Delta Controls 103-1-4W-AA P51Y-3-AA-3 4"NPTY-AA Level Switch

Delta Controls 103-1-4W-AA level switch with the P51Y-3-AA-3 probe is a 4" NPTY-AA assembly that provides a 120 VAC switch output for liquid-level signaling. The P51Y-3-AA-3 probe acts as the sensing element, allowing the switch to be integrated into Delta Controls building automation systems and related control circuits. Part numbers 103-1-4W-AA and P51Y-3-AA-3 identify the complete level-switch assembly and its probe, ensuring compatibility within the Delta Controls ecosystem. Designed for commercial and industrial environments where level indication is required, this unit supports straightforward connection to standard control hardware and is suitable for monitoring tanks, sumps, or other liquid-handling equipment in a 120 VAC control scheme.