This Harmony 9001K, push-to-test metal pilot light, with a blue LED and a blue lens, is supplied with 24V to 28V AC/DC. It has a chromium-plated metal bezel, a blue LED, and a polycarbonate blue Fresnel lens. This blue push-to-test pilot light provides an ergonomic and visual interface for your machines. It is easily installed into standard 30mm diameter panel cut-outs and connected to control circuits with classic screw-clamp connections. It is distinguishable visually at a distance thanks to its illuminated head and clear color. It is impact-resistant, dust-resistant, water-resistant, and vibration-resistant thanks to its NEMA 1/2/3/3R/4/6/12/13 ratings. It complies with many international standards and certifications, such as CSA LR25490 class 3211 03, UL listed file E42259 CCN NKCR, and CE. Harmony 9001K is a range of heavy-duty chromium-plated metal pushbuttons, selector switches, pilot lights, and specialty operators.