Under the harsh operating conditions of the chemical industry, the BLH802 straight-rod insertion type level transmitter stands out with its excellent corrosion resistance and precise measurement performance. As a flagship product of Xi'an Shenghongchuang Instrumentation Co., Ltd., this stainless steel level sensor adopts a straight-rod insertion design and can stably monitor the level of various corrosive media, making it the preferred solution for chemical industry operators among series such as DBS502 and LC-502.

I. Definition and Core Advantages

The BLH802 straight-rod insertion type level transmitter is a high-precision measuring device based on the diffused silicon piezoresistive principle. Its core components are made of 316L stainless steel, enabling it to withstand strong acid and strong alkali media with a PH value of 1-14. Compared with traditional float-type sensors, the straight-rod insertion design avoids the wear problem of mechanical moving parts, and the measurement accuracy can reach ±0.25%FS. The product has passed IP68 protection certification and can operate continuously at ambient temperatures from -40℃~125℃, making it particularly suitable for liquid level monitoring in enclosed containers such as reaction kettles and storage tanks.

II. Analysis of Application Scenarios in the Chemical Industry

In the chlor-alkali production process, BLH802 can accurately monitor the liquid level of 32% liquid alkali storage tanks, and its unique polytetrafluoroethylene diaphragm can effectively resist chloride ion corrosion. Compared with similar products such as HPT-36, its response time is shortened to 200ms, greatly improving the safety of interlock control systems. Practical data from a large chemical plant shows that after using this transmitter, unplanned shutdowns caused by abnormal liquid levels were reduced by 78%. In addition, in PTA (purified terephthalic acid) production, its unique temperature compensation algorithm can eliminate measurement deviations caused by medium crystallization, which is a technological breakthrough that models such as PN-LR cannot achieve.

III. Comparison of Key Technical Parameters

IV. Selection and Installation Guide

When selecting BLH802, three dimensions need to be emphasized: medium characteristics (corrosiveness, viscosity), process connection method (flange/thread), and output signal type (4-20mA/HART). For special media such as hydrofluoric acid, it is recommended to choose the version equipped with a Hastelloy diaphragm. During installation, it is necessary to ensure that the probe maintains a distance of ≥50mm from the container wall to avoid eddy current interference. The JWP-801D mounting bracket provided by Xi'an Shenghongchuang can adapt to various flange standards from DN80-DN300, greatly reducing the difficulty of on-site modification.

V. Why Choose Shenghongchuang

As a national high-tech enterprise, we have 18 patents related to level measurement, and all products have passed ISO9001:2015 quality management system certification. The BLH802 series uses the same military-grade signal processing chip as MB261, but at a more competitive price. In response to the needs of the chemical industry, we provide: ①72-hour rapid sample customization; ②3-year extended warranty; ③free quarterly calibration service. Contact our engineering team now to obtain selection manuals and technical solutions for the full range of products such as HD502.