Introducing the CL-302 Capacitive Liquid Level Sensor, a robust electronic component built to provide reliable leak-proof detection. Unlike traditional probes that require penetration, this Capacitive Tank Level Sensor adheres to the exterior of the tank, preserving the container's integrity. It is designed to operate in a wide voltage range (4.5V to 24V) and delivers a clear TTL signal output. With a lifespan of up to 50,000 hours and an IP64 protection rating, this sensor is built to withstand the demands of continuous operation in diverse environments.
Product Features
Solid-State Reliability: No mechanical moving parts ensure long-term durability and resistance to wear and tear.
Non-Invasive Installation: Simply mount the sensor on the outside of the non-metallic tank for easy assembly and maintenance.
Wide Voltage Compatibility: Operates on a broad voltage range (4.5V ~ 24V), making it suitable for various system requirements.
Industrial Grade: Rated for IP64 protection against dust and water splashes, ensuring stable performance.
Working Principle & Core Formula
This capacitive liquid level sensor detects fluid presence by monitoring real-time changes in capacitance. Its operating principle and signal output are as follows:
Capacitance Detection: The sensor establishes an electric field through the non-conductive container wall. When liquid is present, the dielectric constant changes, causing a fluctuation in capacitance.
Signal Processing: The built-in circuit accurately captures this capacitance change, followed by filtering and amplification processing.
Output Logic:
🟢 Liquid Detected: Outputs a LOW level (< 0.3V).
🔴 No Liquid: Outputs a HIGH level (> 4.5V).
⚠️ Note: To ensure proper electric field penetration, please make sure the container wall at the installation point is made of a non-metallic material.
Product Parameters
| Parameter | Symbol | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Operating Voltage | VDD | - | 4.5 | 5 | 24 | V |
| Current (Water) | IDD | VDD=5V, Water | 1.5 | 2 | 3 | mA |
| Current (Air) | IDD | VDD=5V, Air | 1.5 | 2 | 3 | mA |
| Output Signal | - | - | TTL | - | - | - |
| Response Time | - | - | - | - | 1 | s |
| Operating Temperature | T opr | - | 0 | 25 | 40 | ℃ |
| Storage Temperature | T stg | - | -20 | - | 60 | ℃ |
| Working Life | Mt | - | - | 50,000 | - | h |
Application Fields
This versatile Capacitive Tank Level Sensor is the perfect choice for applications demanding hygiene and reliability:
Beverage Equipment: Ensuring smooth operation in water dispensers and coffee machines.
Medical Technology: Providing safe fluid monitoring in medical analyzers and treatment devices.
Industrial Automation: Controlling liquid levels in chemical tanks and manufacturing equipment.
Smart Home: Enabling intelligent water management in humidifiers and water purifiers.
Installation Method
Professional and rigorous, including engineering details like "avoiding air bubbles" to minimize after-sales support costs.
[Installation Guidelines & Wiring Instructions]
To guarantee detection accuracy and prolong the service life of the sensor, strictly adhere to the following deployment specifications:
Mounting Surface Treatment: Before installation, thoroughly remove any debris from the outer wall of the container. Ensure the contact surface is flat, clean, and completely dry to prevent abnormal capacitance readings caused by trapped air bubbles or impurities.
Mounting Method: Use the provided adhesive backing or dedicated fixtures to attach the sensor tightly to the sidewall of a non-conductive tank.
️ Critical Constraints:
Material Requirements: Based on electric field penetration principles, this sensor is exclusively designed for non-metallic containers and will not function with metal tanks.
Environmental Protection: The sensor body and circuit board are not waterproof. Please implement external insulation and moisture-proofing measures; do not place the unit in high-humidity or submerged environments.
Electrical Connections:
VCC: Connect to the system's positive power supply.
GND: Connect to the system ground.
SIGNAL: Connect to a digital/analog input pin on your microcontroller (MCU).
Customizable Options
1. Electrical & Detection Parameter Customization
Support customized detection range (0.1-3m adjustable), detection sensitivity and switch threshold. Customize special working voltage, signal output type and resolution to adapt to different brands of automated line control systems and industrial host equipment.
2. Structural & Mounting Customization
Customize probe length, probe diameter, thread specification and fixing bracket structure. Provide non-standard size customization for special-shaped tanks and narrow installation spaces of automated production lines to achieve precise fitting installation.
3. Material & Protection Customization
Support upgrading protection grade, customizing high and low temperature resistant, anti-oxidation and anti-corrosion shell materials. Customize wire length, waterproof connectors and shielding accessories to adapt to harsh industrial environments such as high temperature, humidity and heavy dust.
Why Choose Us
Scenario-Specific Industrial Optimization Targetedly optimized for automated production line environments, with industrial-grade anti-interference and continuous operation capability. It has stronger environmental adaptability and operational stability than civilian ordinary level sensors, fully adapting to high-intensity industrial production conditions.
Wide Range & Strong Versatility The 0.1-3m ultra-wide detection range covers most industrial tank and pipeline monitoring scenarios. The standard 5V industrial voltage design ensures strong compatibility with various automated equipment and control systems.
Reliable Mass Production & Delivery Capacity Equipped with professional industrial sensor production lines and complete supply chain management system, we can stably undertake large-batch industrial orders, guarantee on-time delivery, and support long-term stable OEM/ODM cooperative supply.
Professional Technical Support & After-Sales Service We provide long-term product quality warranty and dedicated industrial technical team support. We can quickly solve on-site installation, system debugging and equipment matching problems for automated production lines, ensuring worry-free equipment operation for customers.
FAQ
Q1: Can this Capacitive Tank Level Sensor work through metal tanks?
A: No. The sensor requires a non-conductive (non-metallic) barrier to detect liquid. It cannot be used if the container is made of metal.
Q2: What is the output signal when liquid is detected?
A: When liquid is detected, the sensor outputs a Low Voltage (<0.3V). When no liquid is detected, it outputs a High Voltage (>4.5V).
Q3: What is the operating voltage range?
A: The sensor operates on a wide voltage range from 4.5V to 24V, making it highly versatile for different system designs.
Q4: Is the sensor sensitive to environmental humidity?
A: Yes. The sensor should not be placed in a humid environment, as this may affect the circuit board's performance.
Q5: What is the typical response time?
A: The response time is very fast, with a maximum delay of 1 second.
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