Guided wave radar (GWR) is a popular technology for inventory tank gauging systems due to its accuracy, reliability, and ability to perform in challenging environmental conditions. Here’s how GWR works and why it’s used:
- Principle of Operation: GWR works by sending microwave signals down a probe (waveguide) extending into the tank. When the signal reaches the liquid surface, it is reflected back to the sensor. The time it takes for the signal to return is used to calculate the level of the liquid in the tank.
- Accuracy and Reliability: GWR is known for its high level of accuracy, even in tanks with agitated or turbulent surfaces. It can also accurately measure interface levels in tanks with multiple liquid layers.
- Versatility: GWR can be used in a wide range of tank types and sizes, including those with narrow openings or internal obstructions. It can also handle a variety of liquids, from water to harsh chemicals.
- Ease of Installation and Maintenance: GWR tank gauging systems are relatively easy to install and require minimal maintenance compared to other technologies. The probes are typically inserted from the top of the tank, eliminating the need for tank entry.
- Safety: GWR is a safe technology, as it does not require direct contact with the liquid being measured. This is particularly important when dealing with hazardous or toxic materials.
- Temperature and Pressure Resistance: GWR tank gauging systems can operate effectively in extreme temperatures and pressures, making them suitable for use in a wide range of industries and applications.
The guided wave radar is a reliable and versatile technology for inventory tank gauging, offering high accuracy and performance in challenging environments.