压力表一般用玻璃管制作,大多安装在厨房内。由于我国中南部地区,冬季最低气温在零下几度时出现的次数少、时间短,群众往往忽视厨房的密封,室内的压力表中的水有时会结冰,或被冻坏,池内沼气会全部跑掉,有发生中毒、窒息或失火的危险。为防止压力表中的水结冰,除将其安在温暖处外,往压力表玻璃管中装入抗冻剂是个有效办法。例如,较高浓 Pressure gauges are generally made of glass, mostly installed in the kitchen. As the central and southern regions of our country, when the minimum temperature in winter is less than zero and the time is short, the masses often neglect the sealing of the kitchen. The pressure in the indoor pressure gauges may freeze or be frozen, and all the biogas in the pool will be totally Run away, there is danger of poisoning, suffocation or fire. In order to prevent the water in the pressure gauge from freezing, besides placing it in a warm place, it is an effective way to load the antifreeze into the pressure gauge glass tube. For example, higher concentration