Found 4 alternatives for PTB10030 by Celduc. Magnetic Sensors Position Proximity Speed Modules — Cylinder, Wire Leads.
BLUE 140VAC/0.5A TUBULAR PROXIMI
BLACK MOULDED 140VAC/0.5A PROXIM
PROXIMITY SENSOR 1NO/2 WIRES WIT
PROXIMITY SENSOR 1NO/10W/100VDC/