The Autonica BF4G-R is a standard-type photoelectric sensor with a green LED emitter at 525 nm and an external input sensitivity setting. It uses an NPN open-collector output and offers a selectable Light ON or Dark ON mode via an ON/OFF button. Powered by 12–24 V DC (±10%, ripple up to 10%), it draws up to 45 mA and provides fast response times of 0.5 ms (Frequency 1) and 0.7 ms (Frequency 2), with an OFF Delay timer of 40 ms. Sensitivity is adjustable via an external input (SW1, SW2) in addition to manual control, and mutual interference is managed by a built-in differential frequency mode. It tolerates ambient illumination up to 11,000 lx in sunlight and 3,000 lx under incandescent lighting, with operating temperature -10 to 50°C (storage -20 to 70°C) and humidity 35–85% RH (storage 35–85% RH). Self-diagnosis indicates unstable sensing when the target remains in an unstable level for 300 ms and flags a short-circuit in the control output. Load voltage up to 30 V DC and load current up to 50 mA, with residual voltage not exceeding 1 V at 50 mA. The housing uses a heat-resistant ABS case with a polycarbonate cover, and the cable is Ø4 mm, 6-wire, 2 m long with AWG24 conductors (40 cores total). Accessories include a fixing bracket, bolts, and nuts.