Gains for FTSE 250 precision instrumentation and controls company Spectris are bolstering the electronic and electrical equipment sector on Monday.Spectris's shares rose 5% to 1,416p (3.35pm) after it announced that it is to acquire Omega, a privately held US business providing measurement and control instrumentation services to industrial and academic customers, for $475m (£290m). Spectris said it expects the acquisition of Omega, which has five manufacturing facilities and two distribution/sales branches, to be earnings enhancing in the first year of ownership. Also in demand was sector peer Renishaw, the precision tool maker, which was trading nearly 9% higher at 1,454p, recovering after the recent sell-off. The share price has slumped 23% in just over three weeks since the firm released its full-year results.Meanwhile, the banks were out of favour with heavyweight sector constituents Barclays, Standard Chartered, Lloyds and HSBC among the top ten fallers on the FTSE 100. BCTop performing sectors so far todayIndustrial Metals & Mining 6,304.47 +6.78%Electronic & Electrical Equipment 2,976.98 +3.63%Oil Equipment, Services & Distribution 21,649.77 +3.11%Automobiles & Parts 4,739.26 +2.63%Mining 21,920.17 +1.94%Bottom performing sectors so far todayBanks 3,663.64 -1.07%Software & Computer Services 636.19 -0.44%Fixed Line Telecommunications 2,132.65 -0.40%