For LNG (Liquefied Natural Gas) tank gauging systems, several types of sensors are commonly used to measure and monitor the level, temperature, and pressure of the LNG in the storage tanks. These sensors are crucial for ensuring the safe and efficient operation of LNG facilities. Here are some of the key sensors used in LNG tank gauging systems:
- Level Sensors: Level sensors are used to measure the level of LNG in the storage tanks. Common types of level sensors include radar sensors, ultrasonic sensors, and guided wave radar sensors. These sensors provide accurate and reliable level measurements, even in harsh environmental conditions.
- Temperature Sensors: Temperature sensors are used to monitor the temperature of the LNG in the storage tanks. Accurate temperature measurement is critical for maintaining the LNG in its liquid state. Common types of temperature sensors used in LNG tank gauging systems include thermocouples and resistance temperature detectors (RTDs).
- Pressure Sensors: Pressure sensors are used to measure the pressure of the LNG in the storage tanks. Pressure measurement is important for ensuring the safe operation of the tanks and for calculating the density of the LNG. Common types of pressure sensors used in LNG tank gauging systems include piezoelectric sensors and strain gauge sensors.
- Density Sensors: Density sensors are used to measure the density of the LNG in the storage tanks. Density measurement is important for calculating the mass of the LNG in the tanks and for determining the energy content of the LNG. Common types of density sensors used in LNG tank gauging systems include vibrating tube sensors and Coriolis flow meters.
- Vapor Sensors: Vapor sensors are used to detect the presence of vapor in the LNG storage tanks. Vapor detection is important for preventing over-pressurization of the tanks and for ensuring the safety of the storage facility. Common types of vapor sensors used in LNG tank gauging systems include infrared sensors and catalytic bead sensors.
These sensors play a critical role in the safe and efficient operation of LNG storage and transportation facilities by providing accurate and reliable measurements of key parameters such as level, temperature, pressure, density, and vapor presence.