EMA-11 measuring anchor, also known as rock bolt extensometer, is used to determine load exerted on rock bolts. It is a precision instrument designed to evaluate anchor system forces and their distribution within the length of the bolt and hence its safety and effectiveness.
A digital caliper/micrometer depth gage with a resolution of 0.01 mm is used to take readings. An electrical head assembly consisting of four potentiometric sensors is optionally available for electrical output.
Rock Bolt Extensometer EMA-11
• Reliable, accurate and simple to read.
• Suitable for remote reading of displacement.
• Probe is robust, care being given to protect all components and sub-assemblies from ingress of water and corrosion.
• Range upto 100 mm of displacement.
• Easy to install. • Reasonably priced