普通的框式或直尺式水平仪,是通过观察气泡停留位置来确定被检测物是否处于水平位置的,使用者感到不便。这里介绍一种经改进的水平仪,不必观察气泡在刻线上的位置,只要电路中的两个聚光电珠同时发光,就说明被检测物处于水平位置。该水平仪电路如图所示。图中K_1、K_2是普通水银单向开关。它内部有一个长电极和一个短电极,水银槽跨在长电极上。当水平仪处于水平位置时,两个水银单向开关中的长短电极被滑过的水银球接通,两个聚光电珠就同时发光。该水平仪不管向右或向左倾 Ordinary box or ruler level instrument, by observing the bubble position to determine whether the detected object is in a horizontal position, the user feel inconvenience. Here to introduce an improved spirit level, you do not have to observe the position of the bubble on the score, as long as the two light-emitting circuit in the same light-emitting, indicating that the test object in a horizontal position. The level meter circuit as shown. Figure K_1, K_2 is a common mercury one-way switch. It has a long internal electrode and a short electrode, mercury tank across the long electrode. When the level in the horizontal position, the two mercury one-way switch in the long and short electrodes connected by the glistening ball, the two condenser light at the same time luminous. The level does not matter to the right or to the left