Level Switches​

• Point level measurement works like a switch, it detects if material is present at a specific level and sends an on/off signal. It’s used for high/low alarms or pump control. Common technologies include vibratingforks, paddles, vibrating rods, and capacitance switches. 
• Continuous level measurement provides real-time reading across the full range of the tank or silo. It’s used for inventory, process control, and monitoring. Technologies include guided wave radar, non-contactingradar, and differential pressure. 

A vibrating fork level switch offers several advantages compared to other point level detection technologies like float switches or optical sensors: 

1. Reliable in difficult media ​
   Works well with a wide range of liquids and solids, including foams, viscous fluids, and materials with low dielectric constants. 
2. No calibration required ​
   Unlike capacitance or ultrasonic sensors, vibrating forks typically don’t require calibration, simplifying installation and maintenance. 
3. Fail-safe operation ​
   Many models offer fail-safe high or low settings, ensuring safe operation in critical applications like overfill or dry-run prevention. 
4. Compact and easy to install ​
   Simple mechanical design with minimal moving parts reduces wear and increases reliability. 
5. Immune to changes in process conditions ​
   Performance is unaffected by changes in pressure, temperature, density, or dielectric properties, unlike some other technologies. 

These technologies are ideal for overfill protection, dry-run prevention, or pump control: 

1. Vibrating Fork Switches

• Reliable in liquids and solids
• Insensitive to change in process conditions and media density
• Great for safety-critical applications

2. Capacitance Probe

• Good for conductive and non-conductive media
• Unaffected by build up

3. Paddle Switch

• Bulk solids like powders, granules, pellets
• Low or high level detection in silos or bins

4. Vibrating Rod

• Easy flowing granulars, powders and light bulk solids