Exhibit 23.2 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statement on Form S-8 of APA Optics, Inc. of our report dated May 5, 2000, with respect to the financial statements of the Company included in its Annual Report on Form 10-K for the year ended March 31, 2000, filed with the Securities and Exchange Commission. /s/ ERNST & YOUNG LLP Minneapolis, Minnesota August 25, 2000 9