What is the ERT-10B bi-reflex target used for?

The ERT-10B bi-reflex target is used for precision deformation monitoring with automated and robotic total stations. Applications include measurement of deformation in tunnels and subway construction, monitoring of dams, bridges, slopes, and building structures, and general surveying works where high-precision total station measurements are required for structural health monitoring.

What makes the ERT-10B a bi-reflex target?

The ERT-10B is called a bi-reflex target because it has reflectors mounted on both sides of its robust frame. This dual-side reflector configuration means the target can be read by the total station from either face, providing greater flexibility in positioning and eliminating the need to ensure a single reflector face is directed toward the instrument.

What is the measuring range of the ERT-10B bi-reflex target?

The ERT-10B bi-reflex target has a measuring range of approximately 12 m to 140 m from the total station. This range makes it suitable for medium-distance monitoring applications such as tunnel section monitoring, structural wall monitoring, and close-range structural deformation measurements. For longer distances up to 600 m, the ERT-10P2 prism target should be used instead.

What is the manufacturing accuracy of the ERT-10B bi-reflex target?

The ERT-10B bi-reflex target has a manufacturing accuracy of ±0.1 mm. This precision manufacturing ensures that when targets are swapped between locations during monitoring programs, the interchange does not introduce significant error into the displacement measurements.

Is the ERT-10B bi-reflex target interchangeable?

Yes. The ERT-10B is designed to be interchangeable. Made from high-performance materials using precise manufacturing processes, targets from the same model can be moved between monitoring points without loss of accuracy. This interchangeability reduces the number of spare targets needed on a monitoring project.

What accessories are available for the ERT-10B bi-reflex target?

Optional accessories include: convergence bolts in 12 mm diameter (Part # 11-10052, galvanized steel rebar with stainless steel threaded stud, 170 mm standard length) and 8 mm diameter (Part # 11-13025) for fixing to structure surfaces; break-off point adaptors in 12 mm (Part # 11-05133) and 8 mm (Part # 11-13024) of plastic acetal material for mounting the target on convergence bolts; and a protective cap (Part # 11-10053) of red polyvinyl chloride for protecting the convergence bolt thread when the target is not installed.

What is the difference between ERT-10B bi-reflex target and ERT-10P2 prism target?

The ERT-10B uses reflective foil on both sides (bi-reflex) with a measuring range of approximately 12 m to 140 m and no addition constant. It is suitable for shorter to medium distance total station measurements. The ERT-10P2 uses a mini prism with a measuring range of approximately 0.3 m to 600 m and has an addition constant of +17.5 mm. The prism target is suitable for longer distance monitoring and provides greater range capability than the bi-reflex reflective foil target. Both are mounted on universal joints and are interchangeable.

What is the universal joint feature of the ERT-10B bi-reflex target?

The ERT-10B bi-reflex target is mounted on a universal joint that allows the target to be oriented in any direction as required. This is important because total station monitoring targets must be precisely aimed at the instrument for accurate reflectance readings. The universal joint enables adjustment to compensate for non-ideal installation angles when the target is mounted on curved or irregular surfaces such as tunnel linings.

Bi-Reflex Target

Model ERT-10B

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Download Data Sheet - English

ERT-10B has reflectors on both sides mounted on a universal joint. It is made of high performance material. The target has a small centre hole to allow precise targeting. These targets are interchangeable.