The SICK GTB6-P4211 is a miniature photoelectric proximity sensor from the G6 series, sized at 12 mm wide by 31.5 mm tall by 21 mm deep — a footprint that fits into tight panel gaps where a standard 18 mm cylindrical barrel won't go. The 250 mm sensing distance (5 mm minimum) uses a visible red PinPoint LED, so alignment is straightforward by eye during commissioning; the 625 µs response time keeps up with fast-moving parts on a conveyor or pick-and-place station. PNP output at 100 mA load current, with selectable Light-ON / Dark-ON switching via the wiring configuration, so it handles both presence and absence detection without a separate converter. The M8 4-pin connector (not a pigtail) allows quick swap without rewiring the panel side, which matters when a line-down replacement has to happen in minutes.
At 12 mm wide, the GTB6-P4211 fits into a standard 12 mm slot or bracket — no adapter plate needed. The M8 4-pin connector mates with standard M8 cordsets (e.g., SICK YG8 series or equivalent); pinout is PNP: pin 1 brown = 10-30 VDC, pin 3 blue = 0 V, pin 4 black = switched output, pin 2 white = not used (or can be configured for alarm output on some G6 variants — check the specific wiring diagram for this order code). Operating voltage range is 10-30 VDC, so it runs on a common 24 VDC control supply without a regulator.