简单可靠的氦液面计将给低温工作带来很多方便。下面介绍的超导液面计制作简单, 精度为1mm。经多次低温实验证明,无论在向杜瓦瓶输液过程, 或在液氦实验中都能真实地指示杜瓦瓶内液氦面的位置。 超导液面计的原理如图1所示。如果超导线s处于液氦中, 其电阻为零,则指示灯L点亮;当超导线离开液面时,由于加热器 Simple and reliable helium liquid level meter will bring a lot of convenience to low temperature work. The following description of the superconducting liquid level meter made simple, accuracy of 1mm. After several low-temperature experiments show that, both in the Dewar flask infusion process, or liquid helium experiment can truly indicate Dewar bottle liquid helium surface position. The principle of superconductive liquid level meter shown in Figure 1. If the superconducting wire s is in liquid helium and its resistance is zero, the indicator lamp L will light up. When the superconducting wire leaves the liquid level, the heater