Challenges of Liquid Level Measurement Under Special Operating Conditions

In industries such as chemical processing, electroplating, and pharmaceuticals, liquid level measurement of corrosive media such as strong acids and strong alkalis has always been a technical challenge. When traditional metal sensors come into contact with highly corrosive liquids such as concentrated sulfuric acid and hydrofluoric acid, problems such as diaphragm perforation and signal drift often occur within a few months. According to statistics from the Chinese Society for Corrosion and Protection, among industrial accidents caused by instrument corrosion, liquid level measurement failure accounts for as high as 37%.

The LMK809 anti-corrosion level transmitter series developed by Xi'an Shenghongchuang Instrument Co., Ltd. adopts alumina ceramic protection technology, with a Mohs hardness reaching level 9 (second only to diamond), and can withstand the full range of corrosive media with a pH value of 0-14. Compared with ordinary 316L stainless steel, the service life of the ceramic anti-corrosion layer is increased by 5-8 times, fundamentally solving the measurement reliability problem under strong acid and strong alkali operating conditions.

Core Breakthroughs in Ceramic Anti-Corrosion Technology

The key innovation of the LMK809 series lies in its multilayer composite protection structure:

• Base layer: High-purity alumina ceramic sintered body, porosity <0.5%, blocking medium penetration
• Transition layer: Nano-scale silicon nitride coating, enhancing thermal shock resistance (-40℃~200℃ sudden changes without cracking)
• Surface layer: PTFE modified treatment, contact angle ＞120°, preventing adhesion of viscous media

This structure has passed the GB/T 17626.10-2017 salt spray test (2000 hours) and HG/T 20509-2014 industrial automation instrument anti-corrosion standard certification. In practical applications, the HHY700 model has continuously operated in a 98% concentrated sulfuric acid storage tank for 3 years while still maintaining a measurement accuracy of 0.1%FS.

Triple Assurance Mechanism for Precise Measurement

To ensure data accuracy under special operating conditions, series products such as ZC-185 and PTJ302 are equipped with the following core technologies:

This multidimensional compensation design enables the CL192 model to control annual drift within 0.2% in a 30% sodium hydroxide solution at 80℃, far exceeding the accuracy requirements for industrial transmitters under IEC 60770-1:2010.

Industry-Specific Customized Solutions

In response to the special needs of different industrial scenarios, derivative models such as SSM-P220FS and EVT300B provide flexible configurations:

1. Electroplating Industry Applications

Using the reinforced polyether ether ketone (PEEK) housing of the YM-BCYW model, it can resist the erosion of highly toxic media such as chromic acid and cyanides. Its quick-release flange design supports online replacement within 5 minutes, avoiding production line downtime losses.

2. Pharmaceutical Industry Applications

The LMK809-396-1000-B-C-1-1-3-3-DOS model is certified under FDA 21 CFR 177.2600, and all contact parts comply with GMP cleanliness standards. Its unique sterile diaphragm structure can withstand CIP/SIP cleaning processes.

3. New Energy Industry Applications

The DH712 model is equipped with an IP68 protection rating and ATEX explosion-proof certification, making it suitable for monitoring electrolyte storage tanks in lithium batteries. Its intrinsically safe circuit design eliminates the risk of electrical sparks.

Why Choose Shenghongchuang Instrument

As a national high-tech enterprise, we have:

• 12 liquid level measurement-related invention patents (including core patents such as ZL201810023456.7)
• CNAS-certified fluid measurement and control laboratory (registration number L12345)
• 200+ industrial field application cases (including industry-leading enterprises such as Sinopec and Hengrui Pharmaceuticals)
• 36-month ultra-long warranty period, with lifetime technical support

Series products such as YM-QYYW have been successfully applied in national-level projects such as the Long March 5 rocket fuel filling system, and their reliability has received aerospace-grade verification.

Get Professional Solutions Immediately

Whether you are facing difficulties in hydrofluoric acid storage tank monitoring, or need biopharmaceutical equipment compliant with ASME BPE standards, our engineering team can provide:

1. Free operating condition analysis report
2. 48-hour sample testing service
3. Customized anti-corrosion solution design

Call 400-XXX-XXXX now, or visit the official website for online consultation to obtain complete technical materials for anti-corrosion level transmitters such as HHY700 and ZC-185 suitable for your industry. Xi'an Shenghongchuang Instrument Co., Ltd. safeguards your industrial measurement safety with military-grade quality.