Abstract: A liquid level indicator comprises an elongate member extending vertically through a liquid container, the weight of the member being sensed as a measure of the liquid level in the container. At least at one predetermined point of its length, the member is formed with a transverse portion having a lower surface extending substantially horizontally. Furthermore, the member is tubular, and the transverse portion is located within the tube but does not occupy the entire internal cross-sectional area thereof. To determine the absolute position of the liquid level, the indicator utilizes an instantaneous change of weight provided by the liquid.

Abstract: In a portable traffic marker, the footplate has on its upper side a recess of rectangular or square outline in which the post is inserted. On the post either a portable traffic marker plate is fixed or a portable traffic marker body is fitted. The post has an M profile, the two mutually parallel side segments of which have the same length as each other, which is at least approximately the same as the inside diameter of the recess in the footplate. The two middle segments of the M profile are likewise of the same length and extend from the point of connection with the respective neighboring side segment at least approximately up to the middle of the line joining the free ends of the two side segments of the M profile.