A servo tank gauge system, often referred to as an STG system, is a technology used to monitor the level and volume of liquid substances, typically stored in large aboveground or underground tanks. These systems are commonly used in industries such as oil and gas, chemical manufacturing, and water management. The primary purpose of a servo tank gauge system is to provide accurate and real-time information about the liquid levels within these tanks.

Here’s how a servo tank gauge system generally works:

1. Measurement Device: The core component of the system is a measurement device or probe that is installed inside the tank. This probe can be of various types, such as a float-operated, radar, servo, or guided wave radar probe. The probe is designed to accurately measure the height of the liquid inside the tank.
2. Signal Transmission: The measurement data obtained by the probe is then transmitted to a control unit or central processing unit. This can be done through various means, including wired or wireless connections, depending on the specific system configuration.
3. Data Processing: The control unit processes the received data to calculate the actual liquid level, volume, and sometimes other parameters like temperature and density. These calculations take into account factors such as tank shape, dimensions, and calibration settings.
4. Display and Communication: The processed data is typically displayed on a local interface or control panel, providing real-time information to operators about the liquid levels in the tanks. Some systems also provide the capability to communicate this information to a centralized control room or to remote monitoring systems.
5. Alarms and Automation: Servo tank gauge systems often include alarm functionalities that trigger alerts if the liquid level reaches predefined thresholds. This is crucial for preventing overflows or low levels that could potentially damage equipment or cause safety hazards. In some cases, these systems can also be integrated with automated processes, such as controlling pumps or valves based on the tank’s liquid level.
6. Accuracy and Calibration: Regular calibration is essential to ensure the accuracy of the measurements. Tank dimensions, temperature variations, and other factors can affect the accuracy of the system over time. Calibration involves comparing the system’s measurements to known reference points to make necessary adjustments.

Servo tank gauge systems are valued for their accuracy, reliability, and ability to provide real-time data, making them crucial tools for industries where precise monitoring of liquid levels is important for operational and safety reasons.