Thermo Fisher Scientific has signed a definitive agreement to acquire Ahura Scientific, manufacturer of portable spectrometers, for $145 million in cash plus the potential for an earn-out payment based on the achievement of certain 2010 financial targets. The acquisition expands Thermo’s portfolio of portable instruments; they already have a line of portable XRF analysers. www.thermofisher.com, www.ahurascientific.com

