This Czujnik drzwi icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 4,300 icons, all in the same style and quality.
Its a logo of a rectangle door with a handle. Above the handle is a sensor that is also shaped like a rectangle, however much smaller because it is latched onto the door. To the right of this sensor, is another shape that is a little larger then the sensor, that is not on the door.