The optical fiber level gauge is a cutting-edge solution designed for precise and safe liquid level monitoring in oil tanks. Developed by Wuhan Xinyi Optoelectronics, this advanced system combines laser ranging technology with fiber optic coupling to provide high-accuracy measurements in challenging environments. Unlike traditional optical fiber level gauges that rely on photoelectric encoders, our system integrates modern laser technology to ensure more stable and accurate results.
The working principle of the optical fiber level gauge involves sending a laser beam through an optical fiber to the top of the tank using a specialized collimating device. The controller and light source are located in a central control room, eliminating any electrical presence at the measurement site, which makes the system inherently safe and suitable for use in explosive environments. This design not only enhances safety but also simplifies installation and maintenance.
The system consists of two main components: the sensor and the controller. The fiber-optic sensor probe includes a high-precision optical coupler and an optical path adjustment device that transmit and receive optical signals while collecting liquid level data. These data are then sent via fiber optics to the controller. The probe is mounted at the top of the tank, operating entirely with optical signals, ensuring no risk of sparks or explosions.
The controller, equipped with a power supply, fiber level sensing module, conversion circuit board, and display screen, modulates and demodulates the optical signal into an electrical signal. It supports functions such as system initialization, historical data retrieval, channel settings, time configuration, and factory reset. Additionally, it features multiple communication interfaces, including 4–20 mA output, RS232, RS485, and GSM modules, enabling seamless integration with industrial control systems and remote monitoring.
This optical fiber level gauge offers numerous advantages. It is modular, isolated from the measured medium, and provides on-site display and data memory, making installation and maintenance easy and efficient. Its long transmission distance and strong anti-interference capability make it ideal for harsh environments. With a measurement accuracy of up to ±3 mm and a range of up to 25 meters, it delivers reliable performance in various applications.
Installation is straightforward—no need to clean the tank or perform hot work, as the system can be installed directly from the tank's manhole or pre-drilled hole. This feature significantly reduces downtime and ensures a safe, hassle-free setup. The system’s modular design enhances reliability and reduces failure rates, making it a preferred choice for industries such as petrochemicals, metallurgy, gas, and defense.
The optical fiber level gauge is widely used for measuring liquid levels in atmospheric, pressurized, and vacuum tanks, including standing, horizontal, spherical, and inner tanks. It supports alarm functions, volume calculation, and quality measurement for various liquid media, such as those found in floating roof and external floating roof tanks. Whether in storage facilities, processing plants, or transportation hubs, this system provides a safe, accurate, and intelligent solution for liquid level monitoring.
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