Sherwin PSM-5 Test Panel (TAM Panel)

The PSM-5 Penetrant System Monitoring Panel provides a quick means of determining the continued serviceability of liquid penetrant inspection systems: fluorescent or visible; water-washable; post-emulsifiable, or pre-wash.

The panel verifies that all elements – penetrant emulsifier, wash, dryer, and developer – are functioning properly. It brings attention major shifts in the system’s operating parameters.

Sherwin Incorporated manufactures each PSM-5 panel to P&WA specifications. A stainless steel panel, 0.090″ thick and measuring 4 x 6 inches. A chrome or grit plated strip runs the length of one side of the panel. Five cracked starbursts are evenly spaced in the chrome or grit plating in order of magnitude; the largest is readily visible with low sensitivity penetrants, while the smallest is difficult to observe even with high sensitivity materials.

*This item is NOT currently in stock and has an extended lead time. Please contact us with any questions prior to ordering.


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We pride ourselves in providing fast deliveries. However inventory changes rapidly and on occasion some items may not be in stock. If you require an expedited shipment, please contact us via e-mail or call our office to confirm availability of an item. *Nominal lead times vary by product.

Product Information

Sherwin Incorporated manufactures each PSM-5 panel to P&W specifications from stainless steel. The panels are .090 inches thick and measure 4×6 inches.

A chrome plated strip runs the length of one side of the panel. Five crack centers are evenly spaced in the chrome strip. The crack centers are raised circular patterns forming a star, or starburst. The smallest crack may appear as a single or dual line instead of a star.

The cracks appear in order of magnitude; the largest being visible with low sensitivity materials and the smallest being difficult to detect with even the highest sensitivity materials. The largest crack center is about 1/4 inch, the second largest 5/32 inch, the third 3/32 inch, the fourth 1/16 inch, and the smallest about 1/32 inch in diameter.

Adjacent to the chrome plating is an oxide grit blasted area, considered “medium rough,” and used to monitor washability and background fluorescence.

There are two versions of the panel.

  • Polished – the chrome plated section is polished and mirror-like.
  • Grit Blasted – the chrome section has been lightly grit blasted to dull the mirror finish. 

While no two panels are identical – crack patterns vary because chrome plating properties and thickness cannot be controlled precisely – each panel conforms to P&WA specifications as confirmed and certified by the Sherwin Incorporated laboratory.