This liquid level sensor works by detecting changes in the refractive index.
Dry State (No Liquid): When the sensor tip is exposed to air, the infrared light reflects back to the receiver. The output signal is High ( >4.6V ).
Wet State (Liquid Detected): When liquid submerges the sensor tip, the light refracts out. The receiver detects less light. The output signal switches to Low ( <0.3V ).
This binary output is easy to interface with any MCU or control board.
Product Features
No More Mechanical Failures
Tired of pumps burning out or leaks caused by stuck float switches? Our photoelectric level sensor has no moving parts. This means zero mechanical wear and a significantly longer service life compared to traditional switches.
Crystal Clear Precision & Stability
Worried about false readings from steam or dirty water? Engineered with advanced optical technology, this sensor provides highly accurate on/off signals. It maintains stable performance even in environments with minor condensation.
Ultra-Compact & Easy to Install
Limited space in your appliance? The PLS-SS100 has a tiny footprint. It can be installed from any direction, making integration into tight spaces (like coffee machines or water heaters) simple and hassle-free.
Built for Safety & Compliance
Safety is non-negotiable. This sensor is fully compliant with RoHS environmental standards. Its sealed construction meets IP67 waterproof standards, protecting internal components from dust and liquid ingress.
Working Principle
The PLS-SS100 optical float switch operates based on the principle of infrared light refraction and reflection. The built-in infrared emitting diode transmits light signals to the optical probe. When the probe is exposed to air, the light is totally reflected inside the probe and received by the internal receiving diode, presenting a specific switch signal state. When the probe is immersed in liquid, the refractive index of the external environment changes, causing most of the light to refract out of the probe. The receiving diode cannot receive effective light signals, and the switch outputs another state signal. By identifying the change of optical signal, the sensor realizes automatic judgment and real-time feedback of liquid level height, so as to achieve automatic control of liquid level rise and fall.
Product Parameters
|
Parameter Item |
Technical Specification |
|
Product Model |
PLS-SS100 |
|
Housing Material |
Stainless Steel |
|
Detection Principle |
Optical Refraction Sensing |
|
Response Time |
≤10ms |
|
Working Voltage |
3.3V-24V DC |
|
Working Current |
≤20mA |
|
Operating Temperature |
-20℃ ~ +80℃ |
|
Output Signal |
Digital Switch Signal |
|
Insulation Resistance |
≥100MΩ |
|
Protection Grade |
IP65 |
|
Service Life |
≥500,000 Times Switching |
Application Fields
This water level sensor is ideal for residential, commercial, and light industrial applications:
Home Appliances: Coffee machines, water dispensers, and washing machines.
Climate Control: Ultrasonic humidifiers and dehumidifiers.
Healthcare: Medical infusion pumps and dialysis machines.
Industrial: Liquid level control in chemical tanks or printing ink systems.
Installation Method
The PLS-SS100 optical float switch supports diversified and simple installation methods, with no complicated debugging procedures. The standard model adopts threaded fixed installation, which can be stably installed at the reserved opening of equipment water tanks and liquid storage containers. It also supports vertical top installation and side horizontal installation according to equipment structural requirements. During installation, ensure the optical detection probe is kept vertically downward or at a standard detection angle to avoid contact with tank walls or sundries, so as to guarantee detection accuracy. The compact structure is suitable for narrow internal installation space of home appliances, featuring quick installation, firm fixation and convenient later disassembly and maintenance.
Customizable Options
1. Structural Customization
Support customized probe length, thread specification, overall size and installation interface to adapt to different tank sizes and equipment structural requirements of customers.
2. Electrical Parameter Customization
Customize working voltage, output signal mode, line length and wiring mode according to customer equipment circuit system parameters to achieve perfect matching with terminal equipment.
3. Performance & Appearance Customization
Support customized high-temperature resistant, enhanced corrosion-resistant versions, and customized surface treatment processes, meeting the detection needs of special liquid environments and personalized equipment assembly standards.
Why Choose Us
First of all, we are a professional dedicated manufacturer of optical float switches and water level sensors, focusing on the R&D and production of liquid level detection sensors for many years, with rich industry experience and mature product technology, deeply understanding the matching needs of smart home appliance scenarios. Secondly, we integrate production and sales, with no intermediate distributors, providing customers with cost-effective products while ensuring quality.
In addition, we support flexible OEM and ODM customization services, which can quickly respond to customers' personalized needs and solve the problem of difficult matching of non-standard equipment sensors. We have a perfect pre-sales and after-sales service system, providing professional technical consultation, scheme optimization guidance and long-term after-sales guarantee. With stable product quality, fast delivery cycle and thoughtful service, we have won long-term trust and cooperation from many home appliance brand customers at home and abroad.
FAQ
Q1: Is the PLS-SS100 optical float switch suitable for all smart home water appliances?
A1: The standard model is applicable to most conventional smart home water equipment such as water purifiers, humidifiers and water heaters. For equipment with special structure, special liquid environment or special electrical requirements, we can provide targeted customized products to ensure perfect adaptation.
Q2: Does the optical float switch have mechanical failure problems?
A2: No. The product adopts pure optical sensing design without mechanical moving parts, avoiding mechanical jamming, wear and rust failure of traditional float switches, with lower failure rate and longer service life.
Q3: Can you provide sample testing service?
A3: Yes. We support sample provision for customer performance testing and scheme verification. After confirming the customer's demand parameters, we can arrange sample delivery quickly.
Q4: What is the delivery cycle for standard and customized products?
A4: Standard PLS-SS100 products are in stock with fast delivery. For customized products, we will confirm the production cycle according to the customization difficulty, and complete production and delivery efficiently on the premise of ensuring quality.
Q5: Can the detection direction be customized?
A: Yes. We offer OEM/ODM services. Please contact our sales team to discuss custom wire lengths, connector types, or specific detection thresholds.
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