How Long Can a Shenghongchuang Corrosive Liquid Level Sensor Last?

The actual service life of a Shenghongchuang corrosive liquid level sensor cannot be simply judged by "how many years it has been in use." The pH value of the medium, temperature, pressure, installation location, wetted materials, cleaning frequency, and on-site electrical environment all affect the sensor's stable operating period. For projects with appropriate model selection, standardized installation, and timely maintenance, level measurement can generally maintain continuous and stable operation for a long time.

Relying on the production base of Shaanxi Qinkong Sensor Technology Co., Ltd., Xi'an Shenghongchuang Instrumentation Co., Ltd. provides level transmitters, pressure transmitters, and supporting intelligent digital display control instruments for the chemical, environmental protection, metallurgy, energy, water treatment, and automation equipment sectors. For media such as hydrochloric acid, sulfuric acid, alkaline solutions, electroplating solutions, wastewater, and process liquids containing impurities, the structure and materials should be determined based on operating conditions rather than solely comparing prices.

Generally, detection environments involving mildly corrosive media at normal temperatures are relatively moderate. High-concentration, strongly oxidizing, crystal-containing, or high-temperature media can significantly increase the risk of wear to diaphragms, probe housings, seals, and cables. Confirming the medium composition and process parameters in advance is the first step in extending sensor service life.

Key Factors Affecting Level Sensor Service Life

Medium Characteristics Determine the Resistance of Wetted Components

The concentration of corrosive liquids is not fixed. For acid and alkali media, changes in concentration, increased temperature, and the addition of oxidants may significantly increase the corrosion rate. Some media have limited effects on stainless steel at normal temperatures, but may accelerate pitting and crevice corrosion at temperatures above 60℃ or in the presence of chloride ions.

The wetted parts of sensors commonly involve materials such as 316L stainless steel, Hastelloy, tantalum, PTFE, PVDF, ceramics, and fluororubber. No material can be considered "absolutely corrosion-resistant"; confirmation must be based on the medium name, concentration range, temperature range, and whether solid particles are present.

For example, when a ceramic capacitive measurement structure is used, the ceramic sensing element offers good wear and corrosion resistance, but the probe housing, sealing ring, and installation connection must also be matched accordingly. Focusing only on the core material while overlooking accessory materials may still result in leakage, zero drift, or housing corrosion.

How to Determine the Suitable Service Period for Different Structures

Selecting the Right Structure Is More Important Than Simply Increasing the Measuring Range

Submersible level transmitters are suitable for continuous level measurement in pools, storage tanks, sewage wells, and open containers. For corrosive media, particular attention should be paid to verifying the vented cable sheath, probe housing, and sealing structure. If the liquid contains a large amount of floating matter or sediment, the probe should not be placed at the bottom of the tank for extended periods.

Flange-mounted or remote level sensors are more suitable for closed containers, pressure vessels, volatile media, and operating conditions where direct immersion is inconvenient. Diaphragm seal structures can reduce the risk of media entering the measurement chamber, but flange specifications, installation orientation, capillary protection, and the temperature range of the fill fluid must all be confirmed during the design stage.

For highly corrosive environments, ceramic capacitive structures, PTFE anti-corrosion structures, or wetted parts customized for the medium can be considered. Based on measuring range, installation dimensions, output signals, and on-site control system requirements, Shenghongchuang can provide recommendations for level measurement and control configurations with output options such as 4-20mA, 0-5V, 0-10V, and RS485.

The Impact of Installation Methods on Long-Term Stability

Reducing Mechanical Damage and Signal Interference

When installing a submersible level sensor, the probe should be positioned in a relatively stable liquid area, away from liquid inlets, agitators, pump outlets, and areas subject to strong impact. Direct liquid flow impinging on the probe may cause mechanical damage to the diaphragm and lead to significant fluctuations in level readings.

Cables should be securely fixed to prevent the probe weight from being borne by the wiring terminals over a long period. For installation locations such as deep wells, deep pools, or installations exceeding 10 meters, fixing measures should be taken according to cable length, liquid density, and on-site tensile force to reduce the risk of cable stretching and loose connections.

4-20mA output has strong anti-interference capability in industrial environments and is suitable for long-distance transmission; RS485 is suitable for applications requiring multi-point networking, remote reading, and system integration. Regardless of the signal selected, shielded cable grounding, power supply stability, and separate routing of high- and low-voltage wiring will affect long-term measurement stability.

How to Extend the Service Period Through Maintenance

Establish an Implementable Inspection and Verification System

It is recommended to strengthen inspections during the first 1 to 3 months after equipment commissioning to confirm that the level display, control interlock, and actual on-site level are consistent. After stable operation is achieved, inspection intervals can be established according to the medium risk level. For equipment with rapid crystallization, severe material buildup, or continuous production, the inspection frequency should be increased as appropriate.

When cleaning the probe, methods compatible with the medium and materials should be used, and sharp tools should be avoided to prevent scratching sensitive parts. If scale buildup on the diaphragm surface, housing corrosion, cable damage, fluctuating readings, or zero offset is found, the equipment should be shut down for inspection promptly and should not continue operating with faults for an extended period.

For critical storage tanks, hazardous chemical medium vessels, or interlock control points, verification records may be retained, including the installation date, medium parameters, measuring range, output signal, zero data, and maintenance time. Continuous data accumulation helps identify performance trends and facilitates scheduling preventive replacement.

Selection Recommendations for Corrosive Level Measurement

Provide Complete Operating Conditions for a More Accurate Configuration Solution

To determine how long a Shenghongchuang corrosive liquid level sensor can last, information including the medium name, concentration, temperature, pressure, level range, vessel structure, installation location, and whether agitation, crystallization, foam, or other conditions are present should first be provided. The more complete the information, the more accurate the material and structural matching will be.

For ordinary liquid storage tanks, anti-corrosion submersible level transmitters may be assessed first; for closed pressure vessels, flange-mounted remote structures may be assessed; for projects involving explosive gas environments, it is also necessary to confirm whether the intrinsic safety or explosion-proof rating is consistent with the on-site area requirements. Ordinary industrial models must not be used as substitutes.

To determine a specific model, please provide Xi'an Shenghongchuang with on-site medium parameters, measuring range, installation drawings, and control system interface requirements. Technical personnel will confirm the wetted materials, output method, protection rating, and maintenance recommendations to develop a level measurement solution suitable for long-term operation.