What are the Types of Liquid Level Sensors?

Liquid level detection sensor is mainly divided into two categories based on their measurement method: contact liquid level sensors and non-contact liquid level sensors. Contact sensors need to be immersed in the liquid to operate, while non-contact sensors utilize the penetration or reflection characteristics of beams to achieve measurement. The following will introduce their specific classifications in detail.

What Types of Contact Liquid Level Sensors?

Common contact liquid level sensors include: float type, capacitive type, optical type, conductive type, and vibration type liquid level sensors.

Float Liquid Level Sensor

Utilizes a float in contact with the liquid. The float moves up and down with the liquid, triggering a switch when it reaches a specific position. Widely used in water tanks, sewage tanks, fuel tanks, etc. Not suitable for high-viscosity or contaminated liquids, as the float can easily become clogged and unable to move to trigger the switch.

Conductive Liquid Level Sensor

Utilizes electrodes in contact with the liquid, using the liquid's conductivity to achieve liquid level detection. Suitable for various conductive liquids. Often used in petrochemical storage tanks, automatic liquid level monitoring in water plants, etc.

Capacitive Liquid Level Sensor

The sensor probe is in contact with the liquid. It can detect both conductive and non-conductive liquids. Mainly used in oil tanks, chemical liquids, and food and beverage processing. Optical level sensors: These sensors detect liquid level by directly contacting the liquid with their tip, utilizing the change in light path caused by the difference in refractive index between the liquid and air.

Vibrational Liquid Level Detection Sensor

When a vibrating fork contacts the liquid, its vibration frequency or amplitude changes due to liquid damping. The sensor determines the liquid level based on this change, making it suitable for complex conditions such as high temperature, high pressure, or foamy and viscous liquids.

Non-contact Liquid Level Sensor

Non-contact liquid level detection sensors measure liquid level without direct contact, offering advantages such as hygiene, corrosion resistance, and adaptability to complex environments. Common types include ultrasonic and radar level sensors. They are widely used in modern drinking water systems and for measuring corrosive or hazardous liquids in industrial settings.

The above content provides a complete introduction to the classification and applications of level sensors. Welcome to visit OFweek for wholesale liquid level sensors, offering a large inventory and efficient logistics services.

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Differences between Liquid Level Sensors and Liquid Level Switches 

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Differences between Liquid Level Sensors and Liquid Level Switches

In our previous introduction to liquid level sensors, we learned that there are many working principles for liquid level sensors. The principle of a liquid level control switch is one of them; therefore, a liquid level switch is a type of level sensor.

However, they differ in function and application. The following will detail the differences between them.

What is a Liquid Level Switch?

A liquid level control switch is an automatic control device used to detect and control the height or level of liquid. It is mainly used to detect the presence, absence, or specific height of liquid in a container, similar to a level alarm. It does not provide continuous and accurate level measurement.

Liquid level switches are generally less expensive than liquid level detection sensors​, offering advantages such as affordability, ease of operation, and fast response. They are widely used in applications that require point-level detection, such as high- and low-level alarms for water tanks and storage tanks, as well as pump control and overflow protection.

What is a Liquid Level Sensor?

A liquid level sensor is a precision liquid detection device that supports real-time monitoring of liquid level height, providing accurate liquid level measurement data. This is crucial for fields such as the chemical and pharmaceutical industries that require high-precision level control.

Liquid level sensors, due to their high detection accuracy (down to the millimeter level), employ more complex core components and manufacturing processes, resulting in typically higher purchase and maintenance costs.

Therefore, when purchasing, you should fully consider the core needs of your industry and application. If your industry requires higher accuracy in liquid level detection, a liquid level sensor is your preferred choice. If you only need to measure the presence of liquid for basic control, such as preventing spills, then a liquid level switch is the ideal option.

We recommend the LLC101000 Honeywell liquid level switch. It features a compact design, supports various threaded interface mountings, offers reliable sensing unaffected by ambient light or small air bubbles, and provides accurate readings.

Welcome to visit OFweek Mall to learn more about liquid level detection sensors.

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What Is A Liquid Level Sensor?

A liquid level sensor is a device used to detect and measure the height and volume of liquid in a container. It converts physical height into an electrical signal in real time, helping the system determine liquid height and level data, thus enabling timely intervention and control of the liquid level.

Working Principles of Liquid Level Sensors

The main working principles of liquid level sensors include: liquid level switch principle, electromagnetic principle, float principle, capacitance principle, optical principle, and ultrasonic principle.

Liquid Level Switch Principle

Uses a float switch to detect liquid height, triggering an alarm when a certain height is exceeded. The LLC101000 Honeywell liquid level switch uses this working principle for liquid level monitoring.

Electromagnetic Principle

Uses a variable resistor to measure changes in liquid height.

Capacitive Principle

Utilizes the difference in dielectric constant between liquid and air. When the liquid level rises, the capacitance between the probe and the container wall changes; the height is calculated by measuring the capacitance value.

Float ('Archimedes') Principle

The float floats up and down with the liquid surface, driving a linkage or potentiometer to change the resistance value, thereby outputting a liquid level signal.

Optical Principle

Measures liquid height by emitting and receiving light.

Ultrasonic principle

High-frequency sound wave pulses are emitted, and the sound waves are reflected after encountering the liquid surface. The liquid level data is obtained by calculating the time difference between transmission and reception and multiplying it by the speed of sound.

Applications of Liquid Level Sensors

Petrochemical and storage tanks: Used to monitor the liquid level in large equipment such as oil storage tanks and chemical containers to ensure safe production and prevent overflow or drying out.

Wastewater treatment plants: Monitors wastewater/raw water levels in waterworks to ensure the normal operation of the treatment system; also used for monitoring lake and river water levels to assist in flood warnings.

Pharmaceutical and food processing: Controls the liquid storage in equipment such as pharmaceutical tanks and beverage production lines to ensure stable production processes.

Smart home appliances: Used in equipment such as water heaters, washing machines, and dishwashers to automatically control water levels to prevent dry burning or overflow.

Automobiles: Detects the levels of fluids such as antifreeze and brake fluid, and reminds users to replenish them in time through sensor feedback.

In short, liquid level sensors play a crucial role in ensuring equipment safety, enhancing production efficiency, and promoting environmental protection by continuously monitoring the liquid status in real-time. There is a huge demand across all industries. OFweek Mall, a professional electronic component wholesale platform, offers a wide selection of liquid level sensors. Welcome to visit our website, where professional sales staff will provide you with one-on-one service.

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Why Is the OPC-N3 PM2.5 Sensor So Popular?

The OPC-N3 PM2.5 particle sensor is a third-generation optical particle counter from Alphasense in the UK. It supports simultaneous detection of PM1, PM2.5, and PM10 particles.

Reasons for the Popularity of the OPC-N3 PM2.5 Sensor

Cost-effectiveness

The OPC-N3 PM2.5 particle sensor is known for its low cost, significantly lower than other similar optical particle counters on the market. It has been proven in various experiments and is widely used in drones, ambient air quality monitoring, and scientific research.

Low Power Consumption

The OPC-N3 PM2.5 particle sensor draws less than 45 mA in standby mode, resulting in extremely low power consumption. This maximizes runtime, making it ideal for remote or battery-powered applications.

Automatic Range Switching

The OPC-N3 features built-in automatic range switching, helping to maintain measurement accuracy under varying pollution levels without manual adjustment.

Wide Measurement Range

It can detect a wide range of particles, from extremely fine to larger (0.38 to 40µm), covering most environmental and health-related particulate matter, including pollen and coarse dust, all integrated into a single sensor. This fully meets the long-term monitoring needs in high-dust environments.

Get the OPC-N3 PM2.5 Sensor at Wholesale Prices at OFweek

If you want to purchase or wholesale OPC-N3 PM2.5 particle sensors, welcome to OFweek. Here you can get it at the best prices, and professional electronic engineers can provide one-on-one technical support for installation and customized solutions. Welcome to visit OFweek for consultation!

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Where Can You Find Low-Cost PM2.5 Sensors?

With continuous industrial and technological development, global air quality is deteriorating. Therefore, people are increasingly concerned about the impact of air pollution on respiratory and lung health. This growing awareness is driving strong demand for smart home electronics such as air purifiers and air quality monitors.

As a core electronic component of air purification and environmental monitoring systems, PM2.5 sensors play a crucial role in driving demand across various industries, including home appliances, automotive manufacturing, and environmental monitoring equipment.

Wholesale Low-cost PM2.5 Sensors at OFweek

OFweek has deep expertise in the electronic components industry, providing comprehensive industry insights, the latest market information, and reliable component sourcing solutions.

On the OFweek, you can choose from over 60 low-cost PM2.5 sensors, all directly supplied by the original manufacturers to ensure stable and reliable quality. This includes the advanced OPC-N3 PM2.5 particle sensor, which supports PM1, PM2.5, and PM10 particulate counting. The OPC-N3 is renowned for its exceptional cost-effectiveness and is widely used in various air quality monitoring and air detection equipment.

OFweek Your Reliable PM2.5 Sensor Supplier

If you are looking for a stable and cost-effective PM2.5 sensor supplier, OFweek is the ideal choice. We offer high-quality sensors, highly competitive prices, and one-stop sourcing services to help you procure efficiently and confidently expand your business. Visit OFweek today to explore our extensive range of PM2.5 sensor products and find the solution that best suits your application.

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What Is a Fiber Optic Temperature Sensor?

What Is A Fiber Optic Pressure Sensor?

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What Is a Fiber Optic Temperature Sensor?

A fiber optic temperature sensor uses optical fiber as the sensing element. It measures temperature by monitoring the minute changes in parameters such as intensity, phase, wavelength, and polarization of light as it propagates through the fiber, as these parameters change with temperature.

Features of Fiber Optic Temperature Sensors

Compared to traditional resistive and thermistor temperature sensors, fiber optic temperature sensors offer higher sensitivity, higher reliability, a wider measurement range, and stronger resistance to electromagnetic interference. They are ideal for applications in harsh environments with high explosion risks and extremely high or low temperatures.

Applications of Fiber Optic Temperature Sensors

Medical Field

Fiber optic temperature sensors are compact, flexible, resistant to electromagnetic interference, and have a fast response time. They are ideal for high-precision medical applications such as minimally invasive surgery, enabling real-time monitoring of tissue temperature and helping doctors improve treatment efficiency and safety. 

The FOT-M fiber optic temperature sensor is a professional medical-grade sensor designed specifically for medical imaging systems and precise tissue temperature monitoring.

Metallurgical Industry

In the metallurgical industry, fiber optic temperature sensors can be used to monitor the temperature of equipment such as blast furnaces and converters, ensuring the stability and safety of the production process.

Aviation Industry

In the aviation industry, fiber optic temperature sensors are used to monitor the temperature distribution of aircraft, ensuring their normal operation and safety.

Energy Industry

In the energy industry, fiber optic temperature sensors are used to monitor the temperature of equipment in nuclear power plants, thermal power plants, and other similar facilities, ensuring their normal operation and safety.

Environmental Protection

In the field of environmental protection, fiber optic temperature sensors are used to monitor the temperature of the atmosphere, water bodies, and other environmental environments, providing data support for environmental protection efforts.

In short, fiber optic temperature sensors play a vital role across various industries. If you are interested in wholesaling fiber optic sensors, please visit OFweek Mall. We offer a wide selection of fiber optic sensors in various specifications.

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What Is A Fiber Optic Pressure Sensor?

A fiber optic pressure sensor is a measuring device that uses optical fiber as the sensing element to detect pressure changes. Its working principle is that when external pressure is applied to the optical fiber, it causes minute deformation in the diaphragm, cavity, or the fiber itself, thus affecting the optical signal within the fiber (changes in light intensity, phase, wavelength, or polarization). The sensor detects these changes in light and converts them into an electrical signal representing pressure.

Features of Fiber Optic Pressure Sensors

Strong anti-interference: Electrically insulated and immune to electromagnetic interference, suitable for hazardous environments such as flammable and explosive materials.

High precision and distributed measurement: Can monitor the health status of structures such as bridges and dams in real time, with a wide measurement range.

Portable and lightweight: Compact and flexible fiberglass, suitable for minimally invasive surgery and confined spaces.

Applications of Fiber Optic Pressure Sensors

Medical: Used for pressure monitoring of tissues or organs such as the cardiovascular system, intracranial cavity, airway, and gastrointestinal tract, enabling real-time analysis of lesions or intraoperative conditions. The FOP-MIV miniature fiber optic pressure sensor is professionally designed for medical applications and is widely used for pressure detection in various organs of the human body.

Industrial: Real-time health monitoring of bridges and dams; pressure detection in flammable and explosive environments.

Aerospace: Used in aircraft flight control systems, wind tunnel simulations, and other applications; offering a wide dynamic range, high accuracy, and the ability to withstand harsh conditions such as high temperatures and pressures.

Welcome to OFweek Mall to Select Fiber Optic Pressure Sensors

OFweek Mall offers a wide variety of fiber optic sensors and fiber optic signal conditioners online. Sold directly by the original manufacturers, offering competitive prices and reliable quality. Welcome to visit and learn more.

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Where Can You Wholesale Premium Electronic Components?

With the rapid development of consumer electronics, new energy, and artificial intelligence industries, the global demand for electronic components is increasing daily. If you are an electronic component distributor or a corporate purchasing agent and are still struggling to find high-quality electronic component suppliers, then you should definitely check out OFweek Mall.

This is a large online electronic component trading platform with a wide variety of premium electronic components and original equipment manufacturers (OEMs). The following content will give you a more comprehensive understanding of OFweek Mall.

What Electronic Components Does OFweek Mall Supply?

When you enter OFweek Mall, you can find various sensors, integrated chips, modules, laser equipment, and instruments for electrical testing, etc.

Why Choose OFweek Mall?

Clear Product Categories

OFweek provides clear product categories, allowing you to quickly find the electronic components you need based on your industry and requirements.

Guaranteed Quality

All electronic components here have passed OFweek Mall's strict qualification review before being listed. Furthermore, regarding pricing, buyers can directly contact suppliers to obtain first-hand quotes, eliminating middlemen and their markups.

Excellent After-Sales Service

OFweek Mall offers excellent after-sales service, supporting a 30-day no-questions-asked return and exchange policy.

We welcome electronic component distributors, purchasing personnel, and electronic engineers to inquire. Our professional sales staff is available 24/7 to provide you with assistance. If you are interested in joining OFweek Mall as a merchant, please contact us.

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