The M12 series Metal Barrel Sensor that are a full complement of sensing modes. Their popular 12mm threaded barrel design allows them to mount easily into tight spaces, with the excellent performance expected of much larger sensors. The single-turn gain potentiometer on most models and two signal LEDs (positioned on either side of the housing for visibility) provide easy alignment and configuration for reliable sensing. When the signal LED is not ON, the green Power LED is visible through all three LED ports. M12 Series fixed-field sensors are powerful diffuse-mode sensors with far-limit cut-off.