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T-square RELS CO-3

The RELS CO-3 T-square provides straight trajectory of ultrasonic transducers movement on a standard CO-3 calibration block.

The T-square provides perpendicularity of a trajectory of movement to a spherical surface of a CO-3 calibration block.

The T-square effectively increases the speed and accuracy of determining the following parameters:

  • Entry point of П121 transducer
  • Arrow of П121 transducer
  • The delay in the prism of П121 transducer
  • Operating frequency of П121 transducer
  • Reserve of sensitivity of П121 transducer


Material Aluminium alloy
Overall dimensions (L×W×h)mm118×38×10
Weightgr21 ± 2
Protective and decorative coating Colored anodic oxidation
Scale Availiable (to find the entry point and for measuring arrow)
Built-in magnets Not available

Setting dimensions

Backlash of fittingmmNot more 0.2
Active work surface of CO-3 calibration block with fixed T-squaremm98×24
Scale lengthmm40 (± 20мм от нуля)
Scale graduation valuemm1
The deviation from the center of the CO-3 scale zero mmNot more  0.3
Directing brink of a straight path Inclined at an angle of 45°


Geometry of T-square fixes its unequivocal position on the CO-3 calibration block.

Inclined directing brink minimizes the friction of the transducer, improves the smoothness of movement, optically doesn’t close the entry point on the transducer.

T-square, in principle, does not fix the position of the transducer. It additionally allows you to quickly and clearly identify the azimuthal deflection of the beam by rotating the transducer, while maintaining a straight path of movement on CO-3 calibration block.