Cheap And Discounts 2PCS E3S-GS15N E3S-GS15N2 E3S-GS15P E3S-GS15P2 Slot Photoelectric Sensor NPN PNP 3-Wire 12-24VDC Sn-15mm Wholesale. Buy Directly From Merchant ShenZhen XinTai Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.