EXHIBIT 12.1

PerkinElmer, Inc

Computation of Ratio of Earnings to Fixed Charges

	Fiscal Year Ended
	January 2, 2005		December 28, 2003		December 29, 2002			December 30, 2001		December 31, 2000
	(In thousands, except for ratio)
Fixed charges
Interest expense and amortization of debt premiums and discounts on all indebtedness	$	37,951	$	54,539	$	33,305		$	42,831	$	43,174
Interest on rental expense		7,414		7,442		7,320			4,099		3,640
Total Fixed Charges		45,365		61,981		40,625			46,930		46,814
Earnings
Income (loss) from continuing operations before income taxes		136,747		85,445		(5,003	)		101,180		146,397
Earnings Available to cover fixed charges	$	182,112	$	147,426	$	35,622		$	148,110	$	193,211
Ratio of earnings to fixed charges		4.0		2.4		—			3.2		4.1
Deficiency in earnings required to cover fixed charges	$	—	$	—	$	5,003		$	—	$	—