Western Instruments W-PG Pie Gauge to ASTM Specifications

The Western Instruments W-PG Pie Gauge to ASTM Specifications is used to measure Magnetic Field Direction, and unfortunately it is often used to ensure the presents of an adequate magnetic field. Outside North America, the Pie Gauge is often referred to as an ASME Magnetic Field Indicator. The design dates to the earliest versions of industry specifications, and is still outlined in ASME, ASTM, and EN versions. The Pie Gauge is very robust, but due to the size (thickness), it is not that effective as a representative of artificial defects. A QQI (CX type) is far superior to a Pie Gauge and even a Castrol Strip can be used to measure field direction.