Dual Bellows Differential Pressure Liquid Level Gauge is 
mainly used in cryogenic liquid containers （vessel or tank）liquid level 
height measurement, such as liquid oxygen, liquid nitrogen, liquid argon, 
liquid carbon dioxide and liquefied natural gas, and can also be used for gas 
or liquid the instantaneous flow of tests. 
Work environment 
 (1)Temperature: -40℃~+70℃
 (2)Relative humidity: ≤95% 
 (3)Atmospheric pressure: 86KPa~106KPa