Electronic devices for measuring length

Production:

Hexagon MI TESA (Switzerland)

TESA offers a whole family of value sensors (electronic probes), as well as the following and most frequently used measuring instruments. Standard probes or, as they are often called, half-bridge probes, operate on an electrical principle. They do not need to be specially tuned.

The electronic probes used with the measuring instrument of other manufacturers work partly on the basis of a differential converter. These are LVTD probes (Differential Linear Variable Transducer). TESA also offers a wide range of probes of this type. However, they must be equipped with an appropriate connector and must be adapted.

All TESA electronic probes can be used with either manual external and internal measuring instruments, or together with measuring racks and other typical measuring instruments. TESA can supply axial probes with a linear displacement of the measuring rod, angled probes with tiltable levers or probes with parallel guides, specially designed for calibration devices, as well as other "in-process" instruments, thus saving a large number of assembly components .

With a few exceptions, all these probes perform "comparative measurements". Based on the main standard, which can serve as a calibration plate (reference sample), an adjusting ring or any other part adopted for the basic standard, a number of dimensions are compared with the tested sample.

All measurements are carried out with high accuracy. Bias errors usually mean very little in the uncertainty budget, since the comparison is made between two values close to each other. Random errors are also significantly reduced, since the display setting and all subsequent measurements are usually carried out under the same conditions.

TESA measuring instruments are equipped with an analog and / or digital display, depending on their type.