What the 250 mm background suppression means for your line
The GTB6-N4212 is a miniature photoelectric proximity sensor from SICK's G6 series, using background suppression to detect objects at a fixed cutoff of 250 mm regardless of target color or reflectivity. That 250 mm maximum sensing distance with a 5 mm minimum means it ignores the conveyor belt or machine frame behind the target — no false triggers from shiny backgrounds. The PinPoint LED, visible red light gives a small, precise spot that simplifies alignment on small parts like bottle caps or PCB carriers. The 625 µs response time supports line speeds up to roughly 800 parts per minute, adequate for most packaging and material handling applications. The NPN output sinks 100 mA — direct interface to most PLC inputs or small relays without an interposing module.
Panel fit and wiring constraints
At 12 mm wide and 31.5 mm tall, the G6 body fits into tight machine frames where a standard 18 mm cylindrical sensor won't go. The M8, 4-pin connector is the compact industrial standard — mates with pre-wired cordsets so you avoid hard-wiring in tight spaces. IP67 rating means the housing and optics survive washdown cycles in food processing or wet assembly lines; the sensor body itself is sealed, but verify the mating cordset is also rated IP67 for the full loop. Operating voltage range 10–30 V covers both 12 VDC and 24 VDC control systems common in automation. Temperature range -25 °C to +55 °C limits indoor or sheltered outdoor use — not rated for freezer or high-heat kiln environments.