1. Magnetic Float Level Gauge:

   • Working Principle: Magnetic float level gauges determine the liquid level or interface position by measuring the magnetic field on the float.
   • Features: Unaffected by the chemical properties, temperature, pressure, etc., of the measuring medium, suitable for various industrial environments.
   • Applications: Commonly used in chemical, petroleum, pharmaceutical industries, etc.

2. Float Ball Level Gauge:

   • Working Principle: Float ball level gauges use a floating ball on the liquid surface to determine the liquid level position.
   • Features: Simple structure, easy operation, suitable for some simple level measurement occasions.
   • Applications: Widely used in water treatment, water supply, drainage, etc.

3. Float Level Gauge:

   • Working Principle: Float level gauges determine the liquid level or interface position by measuring the position of the float.
   • Features: Simple structure, low cost, suitable for medium to low precision level measurement occasions.
   • Applications: Widely used in chemical, food processing, environmental protection, etc.

4. Vibrating Float Level Gauge:

   • Working Principle: Vibrating float level gauges determine the liquid level position by measuring the frequency of float vibration.
   • Features: Suitable for special conditions such as high temperature, high pressure, corrosive media, etc.
   • Applications: Commonly used in petrochemical, power, metallurgy industries, etc.

5. Ultrasonic Float Level Gauge:

   • Working Principle: Ultrasonic float level gauges measure the liquid level or interface position by the propagation speed of sound waves in the liquid.
   • Features: Suitable for special conditions such as high temperature, high pressure, corrosive media, and unaffected by liquid properties.
   • Applications: Commonly used in petrochemical, cement, papermaking industries, etc.

These are common product series of float level/interface gauges, each with specific applications and advantages. Choosing the right float level/interface gauge requires considering process requirements, environmental conditions, and cost factors. It is best to make a comprehensive decision based on the actual situation.