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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