The PLS-SS103 Optical Liquid Switch is a high-precision, solid-state point-level detection sensor independently developed for industrial liquid monitoring scenarios. Adopting advanced infrared optical detection technology, this sensor achieves accurate judgment of liquid presence or absence without any mechanical moving parts. Built with full stainless steel material, it features
excellent corrosion resistance, tightness and stability, perfectly adapting to harsh working conditions of chemical and petroleum industries. It supports standard fixed-output operation and personalized customized modification, covering diverse level detection demands such as liquid level alarm, overflow protection and dry-run prevention. With ultra-fast response speed and long service life, it effectively solves the problems of low precision and easy damage of traditional mechanical level switches, becoming a reliable core component for industrial fluid control systems.
Product Features
Solid-state No-moving-part Design
Different from traditional float level switches, the PLS-SS103 adopts fully solid-state optical sensing structure without mechanical floating balls, springs and wearable parts. It completely avoids failures such as jamming, abrasion and mechanical fatigue, ensuring long-term stable operation and greatly reducing later maintenance costs.
High Precision & Ultra-fast Response
Based on infrared light refraction and reflection principle, the sensor realizes real-time liquid level judgment with no detection lag. It supports accurate point-level monitoring, effectively identifying tiny liquid level changes, and is free from interference of liquid flow, bubbles and slight impurities, maintaining consistent detection accuracy.
Excellent Corrosion & Environmental Resistance
The whole machine adopts high-quality stainless steel structure, which resists corrosion of various chemical liquids, petroleum solvents and acidic and alkaline media. It features wide temperature adaptability, vibration resistance and impact resistance, stably operating in harsh industrial environments such as high temperature, high pressure and dust.
Strong Anti-interference & Wide Compatibility
Free from electromagnetic interference, liquid conductivity and density changes, it is applicable to most oil-based, water-based and chemical mixed liquids. The standard switch signal output is compatible with most industrial PLC, control cabinets and alarm systems, realizing plug-and-play and convenient system docking.
Working Principle
The PLS-SS103 optical liquid switch operates based on the physical principle of infrared light refraction and reflection in different media. The built-in infrared LED emits stable light beams, which are transmitted to the precision optical probe. When the probe is exposed to air (no liquid), the light beam is totally reflected inside the probe and received by the built-in phototransistor, outputting a "no liquid" signal. When the probe is immersed in liquid, the light beam refracts into the liquid medium due to the difference in refractive index between liquid and air, resulting in a sharp decrease in the received light signal of the phototransistor. The sensor instantly converts the light signal change into electrical signal switching, realizing real-time feedback of "liquid present" state, so as to complete liquid level monitoring and linkage control.
Product Parameters
|
Parameter Item |
Technical Specification |
|
Product Model |
PLS-SS103 |
|
Detection Principle |
Infrared Optical Refraction & Reflection |
|
Working Voltage |
12-24VDC |
|
Output Signal |
Switch Signal (NPN/PNP Optional) |
|
Response Time |
≤10ms |
|
Operating Temperature |
-20℃ ~ +80℃ |
|
Pressure Resistance |
≤1.0MPa |
|
Housing Material |
Stainless Steel |
|
Protection Grade |
IP67 |
|
Service Life |
≥100 million switching times |
Application Fields
Focusing on chemical and petroleum industrial scenarios, the PLS-SS103 optical liquid switch is widely used for accurate liquid level monitoring and safety protection in various links. In the petroleum industry, it is applicable to oil storage tanks, pipeline buffer tanks, oil-water separation equipment and tanker liquid level detection, realizing overflow prevention, dry pump protection and liquid level threshold alarm. In the chemical industry, it is suitable for reaction kettles, chemical storage tanks, corrosive liquid conveying pipelines and wastewater treatment equipment, stably detecting various chemical solvents, corrosive liquids and mixed fluids. It is an essential sensing device for industrial fluid automatic control, safety monitoring and equipment fault early warning.
Installation Method
The PLS-SS103 supports flexible top-mounted and side-mounted installation modes to adapt to different tank and pipeline structures. Before installation, confirm the installation position to ensure the probe detection surface is vertically aligned with the liquid level monitoring point and avoid contact with tank walls and internal accessories. For top installation, fix the sensor through the standard thread interface at the top of the tank; for side installation, install it at the preset monitoring height of the tank side to ensure the probe is fully exposed to the medium to be detected. After installation, tighten the thread to ensure good tightness and no leakage. The whole installation process is simple and fast, no complicated debugging is required, and it can be put into use after wiring according to the manual.
Customizable Options
1. Signal Output Customization
Support customized NPN, PNP, relay switch output and analog signal output to match different industrial control systems and equipment linkage requirements.
2. Structural & Size Customization
Customize probe length, thread specification and overall size according to customer equipment tank body, pipeline diameter and installation space limitations.
3. Environmental Adaptation Customization
Customize high temperature resistant, high pressure resistant and enhanced corrosion resistant versions for special working conditions, and support customized protection grades and special medium detection adaptation.
Why Choose Us
Superior Product Performance & High Cost Performance: Adopting high-quality raw materials and core optical technology, our products have higher detection accuracy and stability than peer products, with lower failure rate and longer service life. Direct factory sales eliminate intermediate links, providing customers with high-quality and cost-effective products.
Rich Industrial Customization Experience: For many years, we have focused on supporting chemical and petroleum industrial customers, being familiar with various harsh working condition demands. We can quickly provide targeted sensor solutions for complex detection scenarios that ordinary products cannot adapt to.
Professional Technical & After-sales Support: Provide 24-hour pre-sales technical consultation, working condition scheme matching and after-sales problem solving services. Support on-site installation guidance and long-term product technical maintenance, ensuring customers have no worries in product use.
Stable Mass Production & Fast Delivery: With standardized production lines and sufficient inventory reserves, we can efficiently complete mass production and customized order delivery, greatly shortening customer procurement cycle.
FAQ
Q: What liquids can the PLS-SS103 optical liquid switch detect?
A: It is applicable to most transparent and translucent liquids, including petroleum, diesel, chemical solvents, water-based solutions and other industrial media. It is not affected by liquid conductivity and can stably detect non-conductive and conductive liquids.
Q: Can the sensor work in high temperature and corrosive environments?
A: The standard version works stably at -20℃~+80℃ with stainless steel corrosion resistance. For higher temperature and stronger corrosive scenarios, we can provide customized enhanced corrosion-resistant and high-temperature resistant versions.
Q: Is the installation complicated? Do I need professional debugging?
A: The product supports threaded quick installation with simple operation. It requires no professional debugging and can realize normal detection after correct installation and wiring, with low technical threshold.
Q: Can the product be customized for special equipment and working conditions?
A: Yes. We support full-dimensional customization of product size, signal output, temperature and pressure resistance, medium adaptation and other parameters to meet personalized working condition demands.
Q: What is the service life and after-sales guarantee of the product?
A: The product has a long service life with more than 100 million stable switching times. We provide long-term after-sales technical support and product warranty services, effectively solving product use problems for customers.
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