The SMI Sag Flag is a robust, easy-to-use roof monitor designed for mining operations. It provides continuous visual indication of roof movement, especially roof separation.

The Sag Flag measures rock movements in mine roofs, from a few feet to over 50 feet deep. It uses a reflectorized flag and a scale on the plunger to visually indicate the extent of roof sag or movement, alerting miners to potential hazards.

• Robust Design: Built with stainless steel to withstand harsh mining environments
• Simple Mechanics: Easy to install and monitor without complex equipment.
• Continuous Visual Indication: Uses a reflectorized flag and scale to show movement.
• Versatile Measurement: Capable of detecting roof movements from a few feet to 50+ feet.

The Sag Flag is ideal for mining companies, safety managers, and ground control teams looking to enhance safety by monitoring roof stability and preventing collapses in underground mines.