NM01MX3503
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New & Improved Pie Gauge | Magnetic Field Indicator
Precision Field Orientation Tool – PROUDLY MADE IN THE USA
The USA-Made Pie Gauge is the industry-standard "New and Improved" magnetic field indicator, redesigned for enhanced durability and visual clarity in the field. This essential NDT tool provides a clear, instantaneous visual representation of the magnetic field direction during Magnetic Particle Inspection (MPI).
By utilizing eight precision-machined, low-carbon steel segments furnace-brazed into a single unit, this gauge creates a 360° "star" of artificial discontinuities. It is the most reliable method for ensuring your magnetic flux is properly oriented to detect flaws in any direction.
Why Choose the "Made in the USA" Model?
Enhanced Durability: Features a more robust, heavy-duty copper plating that resists the flaking and peeling often seen in lower-cost imports, ensuring a longer service life in harsh environments.
Precision brazing: The internal segments are aligned with tighter tolerances to provide sharper, more defined indications of the magnetic field.
Full Compliance: Guaranteed to meet the strict material and dimensional requirements of ASTM E709, ASTM E1444, and ASME Section V, ensuring your audits remain flawless.
Domestic Quality Control: Manufactured under strict ISO-certified conditions in the USA, providing NDT technicians with a higher degree of confidence in their equipment's reliability.
Technical Specifications
| Feature | Specification |
| Origin | Made in the USA |
| Material | High-Permeability Low Carbon Steel |
| Construction | 8-Segment Furnace-Brazed |
| Coating | Premium Corrosion-Resistant Copper Plating |
| Diameter | 1.0" (25.4 mm) |
| Standards | ASTM E709, ASTM E1444, ASME Section V Article 7 |
How to Use for Field Orientation
Place the gauge on the workpiece with the copper side up (segments facing the part).
Energize the part with your Yoke, Prods, or Coil.
Apply dry powder or wet suspension magnetic particles.
Analyze the Results: The particles will form a cross or star pattern. The lines that appear most distinct are the ones perpendicular to the magnetic flux. This confirms that your field is strong enough to bridge the brazed seams and is oriented correctly to find real cracks in that same direction.
Ideal Applications
In-Service Inspection: Verifying field direction on pipelines, pressure vessels, and structural steel.
Foundries & Forgings: Ensuring proper coverage on complex-shaped castings.
NDT Audits: Providing a repeatable, standard-compliant method for demonstrating field adequacy to inspectors.