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Products & ServicesFinehood Sensors guarantees quality by using only imported-brand core components and has established long-term strategic partnerships with these suppliers. We boast a daily production capacity of 20,000 sensors per model, backed by lean management principles and a U-shaped production line that enables flexible manufacturing. Additionally, our sensor testing facilities are fully equipped, and after rigorous multi-stage performance tests, our products achieve an impressive 99.9% pass rate.
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Industry SolutionsFinehood Electronics strictly adheres to the ISO9001 quality management system and has successfully been recognized as a National High-Tech Enterprise, boasting multiple patents for its sensor products. Fufan ensures superior sensor quality by sourcing core components exclusively from renowned international brands, with whom we’ve established long-term, strategic partnerships.
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Artisanal Precision Manufacturing
Artisanal Precision ManufacturingFinehood Electronics boasts a dedicated R&D team whose members come from leading sensor companies in Japan, Europe, and North America. With mature and comprehensive sensor solutions at their disposal, the team can significantly reduce engineers' time spent selecting sensors, ultimately helping to shorten product development cycles.
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Support and CustomizationFinehood Electronics boasts a dedicated R&D team whose members come from leading sensor companies in Japan, Europe, and North America. With mature and comprehensive sensor solutions at their disposal, the team can significantly reduce engineers' time spent selecting sensors, ultimately helping to shorten product development cycles.
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AboutShenzhen Finehood Electronics Co., Ltd. was established in 2011 and is a technology-driven manufacturer integrating sensor R&D, production, and sales.
Detailed information
18
2025
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06
Detailed Introduction to Five Types of Level Sensors
Detailed introduction to five types of level sensors:
1. Capacitive Liquid Level Sensor
The capacitive level sensor operates on the principle of capacitance detection. A capacitive level gauge measures the liquid level by detecting changes in capacitance. It consists of a metal rod inserted into the liquid-containing vessel, where the metal rod serves as one electrode of the capacitor and the vessel wall acts as the other electrode. The dielectric material between these two electrodes is the liquid itself, along with any gas present above it. As the liquid level rises, the dielectric constant between the two electrodes increases accordingly, causing the capacitance to grow.
2. Float-type liquid level sensor
The float-type level sensor uses the magnetic float of a float-level switch, which rises and falls with the liquid level, triggering the reed switch chip positioned within the sensor's detection tube and generating an on-off switching signal.
Place one or more reed switches inside a sealed, non-magnetic tube, then pass this tube through one or more hollow floats equipped with annular magnets inside. As the liquid level rises or falls, it will cause the floats to move up and down, triggering the reed switches to either close or open within the non-magnetic tube—and thereby generating a switch signal.
3. Ultrasonic Level Sensor
An ultrasonic level sensor is a non-contact sensor that utilizes the principle of ultrasonic wave reflection—specifically, it calculates the liquid level height by measuring the time difference between the emission and reflection of ultrasonic waves, thereby achieving precise level measurement. It boasts features such as non-contact operation, simple installation, and high sensitivity.
4. Radar-type Level Sensor
Radar level sensors offer the same advantages as laser-based measurement principles, while also being unaffected by the measured medium and less influenced by external environmental factors—eliminating the need for frequent recalibration. However, their typical measurement range is limited to within 6 meters, making them particularly well-suited for in-tank level monitoring in large containers equipped with heating steam systems, such as those used to monitor residual oils, asphalt, and other similar materials.
5. Hydrostatic Level Sensor
The measurement principle is based on the fact that the hydrostatic pressure generated by a liquid column depends on both the liquid's density and its level. A pressure sensor installed at the bottom of the storage tank measures this gauge pressure relative to atmospheric pressure. Using the known density of the medium, the measured value is then converted into the corresponding liquid level.
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