Stable and Reliable! DHE ELL Non-contact Level Transmitter Stands out in the Application in the Fluorine Chemical Industry

ELL Sonar Non-contact Level Transmitter Application

Fluorine chemical industry is a subbranch of the chemical industry and has now developed into one of the fastest growing, most high-tech, and most promising emerging industries in this field. Fluorine chemical products are widely used in transportation, refrigeration, military, aerospace, machinery and other fields due to their excellent performance.

The case introduced in this article comes from a well-known domestic fluorine chemical enterprise. Because of the high degree of automation in research and development production, the accuracy and stability of liquid level measurement in the plant area are extremely high. DHE non-contact level transmitter stands out among many level gauges due to its stability, high precision, and reliability. Nearly a hundred DHE products have been used in the later technological transformation and overhaul, providing assistance to the liquid level measurement of the enterprise.

Introduction to the working conditions：

Measurement medium: Hydrogen fluoride, trifluorochloroethylene, refrigerant F32, refrigerant 152a, etc.

Measurement challenges: Major hazards, easily evaporating strong acid media, and great affection by temperature; high level range of storage tanks, unstable echo signals when the liquid level is high.

Tank information: Sausage tank, ø 3600mm, ø 1000mm, etc., measuring range up to 20m.

Selected product: ELL-FI-CE Non-contact Level Transmitter

Background of technological transformation and solutions from DHE：

The materials in the upstream industry of the fluorine chemical industry are mostly toxic and harmful major hazards, and the related tank farms also state hazardous. The factory originally used external stick-type instruments from other manufacturers as the second measurement instrument for technical transformation. However, due to the stability and accuracy of the measurement did not meet the customer's requirements.

There are more than one external measuring products on the market. After investigation and understanding by the factory leadership, the factory decided to try another non-contact level transmitter.

After improvement:

Considering the danger of the measurement medium and the customer's requirements for accuracy and stability, the engineers from DHE suggested the customer to use the ELL non-contact level transmitter.

ELL Sonar Non-contact Level Transmitter is an isolated (completely non-contact) level instrument. Installation of the transmitter outside the tank is simple and fast, without drilling on tanks, stopping production, or operating with flame, which not only reduces personnel workload but also reduces transformation costs. During operation, the working curve of the instrument was compared with the original guided wave radar liquid level curve on the container, and the trend was basically consistent.

1. Yellow curve: Operation curve of imported guided wave radar

2. Blue curve: Operation curve of DHE ELL non-contact level transmitter

3. Orange curve: Measurement and operation curves of other products during the same period

As shown in the figure, the three different colored curves reflect the real-time changes in the liquid level in the container measured by the three instruments. During the measurement period from 26th to 29th, the blue liquid level curve (DHE) and yellow liquid level curve (radar) showed almost the same trend of liquid level change, indicating that the instrument level measurement was stable; The orange liquid level curve (other external measurement products) showed significant fluctuations in the liquid level trend, and when measuring liquid levels above 7 meters, there was a signal loss situation, resulting in unstable liquid level measurement.

After that, the customer decided to purchase ELL non-contact level transmitter in large quantities. So far, our products have been operating stably on-site for nearly two years.

Measurement features of ELL non-contact level transmitter：

ELL non-contact level transmitter attains over 20 patented technologies, including "micro vibration analysis", "automatic calibration", and "small blind zone" technologies. With advanced intelligent processing methods, we have overcome multiple technical barriers in non-contact liquid level measurement technology and overcome the impact of different working conditions on the stability of external liquid level measurement, with a maximum accuracy of ± 1mm.

In 20717, ELL non-contact level transmitter obtained SIL3 (safety integrity level) certification by SITIAS (Shanghai Inspection and Testing Institute of Instruments and Automation Systems).

Look into the future：

Fluorine chemical industry has become an important component of the national strategic emerging industries. China's fluorine chemical industry is steadily developing and will continue to expand in new application fields in the future. DHE has received unanimous praise from numerous fluorine chemical enterprises due to its excellent product performance and attentive service from after-sales engineers.