Side Mounted Bicolor Roller Type Magnetic Level Indicators are designed for continuous, non-electric level monitoring in pressurized and non-pressurized vessels. The system works on the principle of a magnetic float moving with the liquid level inside the chamber. The float magnet actuates bicolor rollers on the external indicator rail, which rotate to show a clear red-and-white color contrast for liquid and vapor phases. This ensures excellent visibility from long distances and eliminates the need for glass tube gauges, making it ideal for hazardous or corrosive environments.