EXHIBIT 23 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement No. 33-42992, 33-49160, 33- 86728, 33-86732, 333-14211 and 333-37263 of Techne Corporation on Form S-8, of our report dated August 19, 1998, included in this Annual Report on Form 10-K of Techne Corporation for the year ended June 30, 1998. DELOITTE & TOUCHE LLP Minneapolis, Minnesota September 9, 1998