In-depth Analysis of the High-Temperature Stability Test of the UHLDB Electromagnetic Flowmeter

The latest high-temperature stability test report released by Xi'an Shenghongchuang Instrument Co., Ltd. shows that this product still maintains excellent performance under extreme operating conditions. The report provides a horizontal comparison of mainstream electromagnetic flowmeters such as ARSLDE and ZFG-F, offering key data support for technical evaluators. In high-temperature operating scenarios such as petrochemical and metallurgy, the stability of flowmeters is directly related to production safety and efficiency. This article will provide professional reference for industry users from three dimensions: test methods, data comparison, and technical principles.

1. High-Temperature Test Environment and Standards System

This test strictly followed the national standard GB/T 18660-2018 "Electromagnetic Flowmeter", simulating a gradient temperature rise environment of 80℃~150℃. The test equipment used a German JUMO high-temperature constant temperature chamber, combined with a Fluke 726 calibrator for real-time data acquisition. The comparison samples included five mainstream products on the market, such as UHLDB, ARSLDE electromagnetic flowmeters, and ZFG-S, and all equipment passed ISO 9001 quality management system certification.

The test data shows that under continuous operation at 120℃, the zero drift of the UHLDB model was only 0.12%FS, far better than the industry average standard of 0.3%FS. Its combination of alumina ceramic lining and titanium electrodes can still maintain a measurement accuracy of ±0.5% in high-temperature corrosive media. In comparison, some TOSHIBA-LF electromagnetic flowmeters showed obvious signal attenuation when exceeding 100℃.

2. Horizontal Comparison of Core Performance Parameters

It is particularly noteworthy that in the simulated thermal shock test (80℃←→150℃ cyclic change), the UHLDB electromagnetic flowmeter, relying on its patented Thermo-Shield technology, controlled the sensor coil impedance variation rate within 3%. Under the same scenario, the coil parameter fluctuation of the WST electromagnetic flowmeter reached 8%, directly affecting the stability of the flow signal.

3. Technological Innovation and Structural Optimization

The UHLDB model breaks through the design limitations of traditional electromagnetic flowmeters: first, it adopts a multi-layer composite excitation coil architecture, offsetting the magnetic flux loss caused by high temperature through orthogonal magnetic field compensation technology; second, a temperature compensation algorithm is embedded in the signal processing module to correct measurement errors caused by changes in medium conductivity in real time. These innovations enable this product to achieve an industry-leading data repeatability of 0.15% in high-temperature steam flow measurement scenarios.

Compared with the open sensor design of the ORBLDBE electromagnetic flowmeter, the IP68 protection grade housing of UHLDB can effectively prevent dust intrusion in high-temperature environments. Tests show that after continuous operation for 200 hours in high-temperature media containing solid particles, its electrode contamination coefficient was only 1/3 of that of the AMF electromagnetic flowmeter.

4. Verification of Industry Application Scenarios

In an actual test case at a coking plant in Shaanxi, the UHLDB electromagnetic flowmeter operated continuously for 6 months in a 95℃ mixed medium of tar oil and ammonia water, during which there was no signal loss caused by electrode scaling. In contrast, the WSTE electromagnetic flowmeter installed during the same period required shutdown cleaning and maintenance every month. According to calculations, the annual comprehensive maintenance cost of UHLDB can be reduced by 42% compared with similar products.

For high-temperature molten salt flow measurement in the metallurgical industry, the special electrode material of UHLDB can withstand a strongly corrosive environment with a pH value of 0.5~14. Data from a stainless steel smelting project shows that compared with the ZFG-S electromagnetic flowmeter, when measuring 800℃ heat transfer oil, pressure loss was reduced by 27%, with remarkable energy-saving effects.

Technical Selection Recommendations and Solutions

Based on the test data, we recommend giving priority to the following technical parameters for high-temperature working conditions: the operating temperature range should be at least 30℃ higher than the medium temperature, the electrode material should be selected as titanium/Hastelloy according to the corrosive characteristics of the medium, and the excitation frequency is recommended to use a low-frequency square wave to reduce high-temperature interference. Xi'an Shenghongchuang can provide operating condition adaptation solutions for UHLDB electromagnetic flowmeters, including customized lining materials, explosion-proof certification, and other value-added services.

As a high-tech enterprise focusing on flow control equipment for 20 years, our products have passed SIL2 functional safety certification and NEPSI explosion-proof certification. If you need to obtain the complete test report or on-site working condition evaluation, please contact the technical team immediately for customized solutions.