The CL-301 Capacitive Liquid Level Sensor is a compact electronic component engineered to detect the presence or absence of liquid without penetrating the container. Utilizing advanced capacitive sensing technology, it operates effectively through non-metallic walls. This capacitance-probe-level-sensor is RoHS compliant and built to last, offering a working life of up to 50,000 hours. Whether you need to monitor water levels in a coffee maker or ensure safety in a medical infusion device, this sensor provides precise binary detection (High/Low).
Product Features
Non-Contact Detection: The sensor adheres to the outside of the container (low-temp side), eliminating the risk of leaks and contamination.
Ultra-Compact Size: Small footprint allows for easy integration into space-constrained devices like printers and small water heaters.
Low Power Consumption: Features ultra-low standby current, suitable for battery-operated or energy-efficient appliances.
Digital Output: Clear high/low voltage signals for easy interpretation by MCUs (Microcontrollers).
Working Principle
This capacitance-probe-level-sensor operates based on the principle of capacitance change.
Capacitance Change: The sensor forms a capacitor with the container wall. When liquid (a high-dielectric medium) is present near the sensor, the capacitance value changes significantly.
Signal Processing: The integrated circuit inside the sensor detects this change in capacitance.
Output Switching:
Liquid Detected: The sensor outputs a Low Voltage (<0.1V).
No Liquid Detected: The sensor outputs a High Voltage (>VCC - 0.1V).
Product Parameters
|
Parameter Item |
Technical Specification |
|
Product Model |
CL-301 |
|
Detection Principle |
Capacitance Induction |
|
Detection Accuracy |
±1mm |
|
Working Voltage |
DC 3.3V-5V |
|
Working Current |
≤20mA |
|
Response Time |
≤100ms |
|
Working Temperature |
-20℃ ~ +60℃ |
|
Storage Temperature |
-30℃ ~ +70℃ |
|
Output Signal |
High/Low Level Switch Signal (Customizable) |
|
Protection Grade |
IP65 |
|
Shell Material |
High-grade Insulation Plastic |
|
Service Life |
≥50,000 Hours |
Application Fields
This capacitance-probe-level-sensor is widely used in various industries where hygiene and reliability are critical:
Home Appliances: Water dispensers, electric water heaters, coffee machines, humidifiers.
Office Equipment: Ink level detection in printers.
Medical Devices: Fluid level monitoring in analyzers or treatment equipment.
Industrial Equipment: Liquid level control in non-metallic tanks and reservoirs.
Installation Method
For optimal performance, please adhere to the following installation guidelines:
Surface Preparation: Clean and dry the outer surface of the container where the sensor will be mounted.
Mounting Position: Attach the sensor to the center of the tank wall (refer to the structure of your specific water tank).
Environmental Restrictions:
Non-Metallic Only: The sensor cannot detect liquid through metal containers.
Avoid Humidity: Do not place the sensor circuit board in a humid environment.
Wiring: Connect the sensor to your MCU (Microcontroller) using the recommended circuit: VCC to power, GND to ground, and SIGNAL to the input pin.
Customizable Options
1. Structural Customization
Support customized probe length, probe diameter, installation thread size and fixing method according to customer's water tank size and installation space, adapting to non-standard equipment structures of different models of water dispensers.
2. Signal Customization
Customize output signal types including digital switch signal, analog voltage signal, etc., and adjust high/low level threshold parameters and sensitivity to match different equipment control systems.
3. Appearance & Protection Customization
Support customized shell material, wire length, connector type, and upgrade protection grade according to special usage environments to meet dust-proof, waterproof and high-temperature resistant enhanced requirements.
Why Choose Us
Professional Scenario Customization Targetedly optimized for water dispenser scenarios, fully adapting to clean water medium and closed water tank working environment, with stronger pertinence than general industrial level sensors and more stable actual use effect.
High Cost Performance While ensuring high precision and high stability, the product structure is simplified, the production cost is optimized, and the price is competitive in the industry. It helps equipment manufacturers reduce procurement costs and improve product market competitiveness.
Stable Mass Supply Capacity With standardized production lines and perfect supply chain system, we can stably supply large-batch orders, ensure delivery cycle, and support long-term OEM/ODM cooperation.
Reliable After-Sales Guarantee We provide long-term product quality guarantee and professional technical support. We have a professional technical team to solve customers' installation, debugging and matching problems in real time, with quick response and reliable service.
FAQ
Q: Is the CL-301 sensor only suitable for water dispensers?
A: It is mainly optimized for water dispenser scenarios, and is also applicable to other small clean water storage equipment such as desktop water tanks, purified water machines and humidifiers. It is not suitable for corrosive, viscous or impurity-containing liquid media.
Q: Does the sensor need regular calibration during use?
A: No regular calibration is required. The product has built-in automatic temperature compensation and signal stabilization program, which can automatically adapt to ambient temperature changes, maintaining stable detection accuracy for long-term use.
Q: Can the sensor be customized for special voltage and signal requirements?
A: Yes. We support customized working voltage, output signal mode, detection sensitivity and other electrical parameters according to customer needs to match different equipment control systems.
Q: What is the waterproof grade of the sensor? Can it work in humid environment for a long time?
A: The protection grade reaches IP65, which is fully dust-proof and splash-proof. It can work stably in the humid internal environment of water dispensers for a long time, with no water vapor penetration or circuit failure.
Q: What is the delivery cycle for customized products?
A: For conventional customized products, the sample delivery cycle is 3-5 working days, and the mass production delivery cycle is 7-10 working days, which can be adjusted according to order quantity and customization difficulty.
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