1 EXHIBIT (23) CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 33-62241) pertaining to the Badger Meter Employee Savings and Stock Ownership Plan, with respect to the financial statements and schedules of the Plan included in this Annual Report Form 11-K for the year ended December 31, 1999. ERNST & YOUNG LLP Milwaukee, Wisconsin June 22, 2000 21