ATS offers an extensive line of calibration test blocks world-renowned for quality and reliability. Each of our basic designs and styles below are available in English or metric units. ATS ultrasonic reference blocks are available in a wide range of block types and materials including 1018 steel, 7075-T6 aluminum, and 304 stainless. Our quality control program is certified to MIL-I-45208A using instruments per MIL-I-45662A. Each block is certified traceable to NIST, with standard and custom units available. Optional features include a custom logo and additional certifications. Call our experienced engineers to provide a quote for custom diameters, lengths, standard specifications, and materials that will meet your unique ultrasonic (UT) requirements.
Request a Quote


30 FBH Resolution Block

ASME Basic Calibration Block

ASME Reference Block

ASTM Area Amplitude

ASTM Distance Amplitude

ASTM Distance/Area Amplitude

DC Distance Calibration Block

DSC Distance/Sensitivity Calibration Block

DS Distance Sensitivity Calibration Block

E317 Calibration Blocks

EDM Notching

IIW Type 1 (MIL-STD)

IIW Type 2 (MIL-STD)

IOW Beam Profile Block

Miniature Angle Beam (Rompus) Calibration Block

Miniature Resolution Calibration Block

NAVSHIPS Calibration Block

RC (AWS) Resolution Calibration Block

SC Sensitivity Calibration Block

Custom Thickness Gauges

Step Block Thickness Gauges