THE EALEY TAPE EXTENSOMETER

THE COST EFFECTIVE WAY TO MONITOR FOR MOVEMENT

- ACCURATE -

- QUICK AND SIMPLE TO USE -

- EASY TO READ DIGITAL DISPLAY -

When monitoring for movement the only way to be safe is to be sure, and the only way to be sure is to use the Ealey Digital Tape Extensometer. While some laser and electronic measuring systems claim accuracies of less than a millimeter, the digital extensometer is the only instrument that will provide tenth of a millimetre accuracy under everyday site conditions, with this kind of accuracy being easily obtainable.

Because the digital extensometer monitors for movement by hooking into eye bolts secured to the tunnel or structure being monitored, it always measures from the same point and, thanks to the unique tension sensor, it always applies the same tension to the tape to ensure the best possible accuracy.

By utilising those same eye bolts to attach a levelling staff or EDM target, it is possible to make the the digital extensometer part of a larger monitoring system which will provide data on lateral, longitudinal and vertical movements.

The Ealey Digital Tape Extensometer has been specifically designed to be user friendly as well as accurate, the simple fold away winding handle enables the tape to be tensioned quickly and easily without the awkward arm movements the knorled nut systems on other instruments require. The tensioning of the tape is as simple as anyone could ask for. When the correct tension is reached, a green light switches on, if too much tension is applied, the green light goes out and is replaced by a red light. Even though the unique tension sensor is electronically operated it is fully automatic and does not need to be switched on or off. Each instrument comes in it's own sturdy carrying case.

This instrument has been designed by highly experienced users of tunnel monitoring equipment who know just what is needed from both the instrument and the after sales service.

Thanks to them we offer:

• An instrument that can be read at awkward angles, no straining to see two white lines and no parallex problems.

• Tapes that are punched on a machine specially designed to make every tape interchangeable, if you should accidentally break a tape you can fit a new one without any significant loss of continuity in your readings.

• Genuinely interchangeable instruments, no need to allocate a certain instrument to a specific monitoring task.

• A full calibration and repair service. The tension sensor and the self length of the instrument are fully adjustable, so when your extensometer comes back for an annual service or for repair, the same test equipment will be used to restore it to it's original physical characteristics.

• A range of accessories to enable the instrument to be used in large diameter tunnels without the need for ladders or towers, and accessories to enable the extensometer eye bolts to be incorporated into a larger monitoring system.

• Most important of all, technical support for users. We will be happy to advise you on how to get the best from your instrument or discuss modifications to enable the system to meet any special requirements you may have.