Features Professional Process: The switch is a non-recessed NPN normally open mode capacitive proximity switch, manufactured with professional process and in compliance with international production standards. Stable and Reliable: The wiring length of inductive proximity switch is 470mm, and the detection distance is about 5mm, which has stable and reliable performance. Advanced Material: this normally open mode auto leveling sensor switch housing is nickel-plated brass, and the detection exterior is made of ABS, which is not easy to corrode and rust and has a long service life. Detection Materials: this sensor proximity switch is widely used, and can be applied to detect metals, non-metals such as plastic, glass, wood, liquids such as water, oil, etc. Compatible Machine Type: This capacitive sensor proximity switch is used for 3D printer for ET4 series, for ET4, 4 Pro, with good compatibility. Specification: Item Type: Capacitive Proximity Switch Material: Brass nickel plated, ABS Installation Type: Non recessed Action Mode: NPN normally open Detection Distance: 5mm ±10% Lag Distance: Less than 10% of the detection distance Detection Object: Metal, non metal: plastic, glass, wood, liquid: water, oil, etc. Use Voltage: DC 6-36V Operating Ambient Temperature: -25°C to 65°C, no freezing Operating Environment Humidity: 35-95%RH Applicable Model: For ET4 series, for ET4, 4 Pro Wiring Length: Approx.470mm/18.5in Package List: 1 x Capacitive Proximity Switch Package List 1 x Capacitive Proximity Switch