Level Gauge – Description

• A level gauge (often called a level indicator) is an instrument used to measure and display the level of liquids or solids inside a tank, vessel, boiler, or container. It helps operators know how much material is present at any given time.
• A level gauge provides a visual or electronic indication of the height of a substance relative to a reference point (usually the bottom of a tank). It is widely used in industries like oil & gas, chemical processing, water treatment, and power plants.

⚙️ Main Types of Level Gauges

1. Sight Glass Level Gauge

• A transparent tube or window mounted on the tank
• Liquid level is directly visible
• Simple and inexpensive, but limited to safe pressures/fluids

2. Magnetic Level Gauge

• Uses a float with magnets inside a sealed chamber
• External indicator shows level using magnetic flags
• Works well for high pressure or hazardous liquids

3. Float-Type Level Gauge

• A float moves with liquid level
• Mechanical linkage or sensor converts motion into reading
• Common in storage tanks

4. Electronic / Radar Level Gauge

• Uses radar, ultrasonic, or capacitance signals
• No direct contact with liquid (in many cases)
• High accuracy and suitable for large industrial tanks

📌 Key Functions

• Measures liquid or solid level continuously or at set points
• Prevents overflow and dry-run conditions
• Helps in process control and inventory management
• Improves safety in industrial systems

🏭 Applications

• Water tanks and reservoirs
• Oil storage tanks
• Chemical reactors
• Boilers and steam systems
• Food and beverage processing