Quick view Parker Research Parker Research DA-400 Contour Probe Compact AC/DC Yoke,115 VAC $554.05 Parker DA400 sThe selective AC and pulsed DC functions are built into a single reliable instrument. The AC mode produces an intense AC field, for detection of surface defects and demagnetizing after... Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List