Balluff BNS 819-B03-D12-61-24-10 is a binary sensor in Balluff's BNS 819 family of mechanical switches used to translate plunger movement into digital signals for automation systems. The D12 in the part number denotes a 12 mm plunger diameter (actuator), as evidenced by variant listings such as BNS 819-B03-R12-61-24-10 and BNS 819-D03-D12-61-24-10 in distributor catalogs. The model is widely referenced across catalogs as BNS 819-D03-D12-61-24-10, showing consistent variant naming across Balluff's product line.
