EXHIBIT 23(d)



                      CONSENT OF INDEPENDENT ACCOUNTANTS
                                       
                                       
                                       
We consent to the inclusion in this Registration Statement of Hach Company on 
Form S-4 of our reports dated June 26, 1997, on our audit of the consolidated 
financial statements of Hach Company as of April 30, 1997 and 1996 and for 
each of the three years in the period ended April 30, 1997, which reports are 
included in the Annual Report on Form 10-K.  We also consent to the reference 
to our firm under the caption "Experts."

                                        COOPERS & LYBRAND L.L.P.



Denver, Colorado
March 23, 1998