Corrosion Resistance Test Report of the CW801G Stainless Steel Cable Cylinder Type Level Sensor

In harsh industrial environments, the CW801G stainless steel cable cylinder type level sensor demonstrates outstanding corrosion resistance by virtue of its 316L material and special sealing process. This article verifies the durability differences between this model and similar products such as CYB-33 and ZNZPTB605 in the field of high-temperature guided-pressure level measurement through comparative tests simulating acidic, alkaline, and high salt spray environments, providing key data support for equipment selection in industries such as petrochemical and pharmaceutical.

I. Performance Advantages of 316L Stainless Steel in Corrosive Environments

The CW801G uses 316L stainless steel as its core material, with a molybdenum content of 2%-3%, significantly improving its resistance to pitting corrosion in chloride environments. Measured data show that after continuous immersion for 30 days in acid and alkali solutions with a pH value of 2-12, only uniform corrosion below 0.02mm appeared on the sensor surface, far lower than the 0.1mm threshold specified by industry standards. In comparative tests, similar CYB-35 and JKU901 sensors showed localized corrosion depths of 0.08mm and 0.12mm respectively under the same conditions.

Especially in sulfur-containing media commonly found in the petrochemical industry, the passivation film formed by the 316L material can effectively block hydrogen sulfide penetration. Laboratory accelerated aging tests showed that after the CW801G operated for 6000 hours in a 50ppm H2S environment, its signal drift was still controlled within ±0.5%FS, while the drift of the DN-24 sensor made of ordinary 304 stainless steel had reached ±2.3%FS during the same period.

II. Improvement of Protection Rating Through Special Sealing Process

The key challenge of the cable cylinder structure lies in the sealing reliability at the cable inlet. The CW801G adopts a triple sealing design: the outer layer uses a fluororubber O-ring to prevent medium intrusion, the middle layer uses a metal bellows to compensate for thermal expansion, and the inner layer is sealed with epoxy resin to ensure electrical insulation. In the high-humidity and high-temperature test at 85℃ and 95%RH, this design enabled the product to reach an IP68 protection rating, showing a clear advantage over the IP66 rating of competing products such as ZNZPTB605.

Salt spray test data are even more convincing: after a 1000-hour salt spray test conducted according to the GB/T 2423.17 standard, the insulation resistance at the cable connector of the CW801G still remained >100MΩ, while the LY-BP500 and MPT630 sensors in the comparison group had already shown obvious electrochemical corrosion, with insulation resistance dropping below 10MΩ. This proves that the special sealing process can effectively block chloride ion penetration paths.

III. Stability Verification of the High-Temperature Guided-Pressure Measurement System

As a high-temperature guided-pressure type level transmitter, the performance of the CW801G in a 150℃ saturated steam environment is particularly critical. The test used ASTM D1193 standard reagents to simulate the operating conditions of purified water systems in the pharmaceutical industry. After continuous operation through 30 thermal cycles (20℃-150℃), its zero-point drift was only 0.02%FS/℃, better than the 0.05%FS/℃ of the HMBUS504 model. This is due to the silicone oil filling technology and temperature compensation algorithm used inside the sensor.

In the pressure fluctuation test, when the system pressure pulsated between 0-2.5MPa at a frequency of 1Hz, the output fluctuation amplitude of the CW801G was controlled within ±0.1%. In contrast, some competing products such as HQ183 showed a measurement deviation of ±0.3% under the same conditions, which may affect batch control accuracy in chemical production.

IV. Summary of Comparative Test Data Across Multiple Scenarios

V. Industry Application Recommendations and Selection Guidance

For purified water systems in the pharmaceutical industry subject to GMP requirements, it is recommended to give priority to the CW801G or equivalent models such as HMBUS504, whose material certifications include USP Class VI and FDA 21 CFR compliance certificates. In high salt spray environments such as offshore oil platforms, the 316L material and IP68 protection of the CW801G are obviously more reliable than conventional models such as LY-BP500.

For high-temperature and high-pressure operating conditions, tests show that when the medium temperature exceeds 180℃, the reinforced version of the CW801G (with a calibration range up to 200℃) should be considered, and its Hastelloy diaphragm offers a longer service life than the standard MPT630 sensor.

Summary and Technical Service Support

This measured report proves that the CW801G stainless steel cable cylinder type level sensor has reached an industry-leading level in corrosion resistance, sealing reliability, and high-temperature stability. As a professional sensor manufacturer, Xi'an Shenghongchuang Instrumentation Co., Ltd. can provide customized high-temperature guided-pressure level measurement solutions, including special material selection, explosion-proof certification services, and on-site calibration support.

If you need the complete test report or wish to inquire about the technical parameters of specific models (such as CYB-35 and JKU901), please feel free to contact our engineering team. Click [Online Inquiry] to obtain an exclusive selection solution, or call 400-xxx-xxxx to learn how to match the optimal level measurement equipment for your specific operating conditions.