. . . Exhibit 12.1 Roper Industries, Inc. Computation of Ratio of Earnings to Fixed Charges Year Ended December 31, Six Months Ended Fiscal Year Ended October 31, (1) June 30, ------------------------------------ ------------ ---------------- 1999 2000 2001 2002 2003 2003 2004 ------- ------- -------- -------- ------------ ------- ------- Ratio of Earnings to Fixed Charges 8.4 5.7 5.7 5.4 4.3 4.6 4.8 ======= ======= ======== ======== ============ ======= ======= Earnings Computation: Income from continuing operations before income taxes $72,566 $76,386 $ 88,865 $ 96,327 $ 66,290 $37,684 $59,976 Add: Fixed Charges (2) 9,766 16,313 19,017 22,076 20,254 10,570 15,976 ------- ------- -------- -------- ------------ ------- ------- Equals: Earnings as defined $82,332 $92,699 $107,882 $118,403 $ 86,544 $48,254 $75,952 ======= ======= ======== ======== ============ ======= ======= (2) Fixed Charges Computation: Interest expense and amortization of debt issuance costs $ 7,254 $13,483 $ 15,917 $ 18,506 $ 16,384 $ 8,635 $13,739 Add: Estimated interest portion of rental expense charged to income (one-third of rent expense) 2,512 2,830 3,100 3,570 3,870 1,935 2,237 ------- ------- -------- -------- ------------ ------- ------- Equals: Fixed Charges as defined $ 9,766 $16,313 $ 19,017 $ 22,076 $ 20,254 $10,570 $15,976 ======= ======= ======== ======== ============ ======= ======= (1) On August 20, 2003, the Board of Directors of the Company approved a change in the date of the Company's year end from October 31 to December 31.