Where, λ is the wavelength spectrum analysis; d is the crystal lattice spacing; θ is the diffraction angle; n is the diffraction order. Use goniometer can measure the diffraction angle spectrum analysis, the use of the formula to calculate the corresponding wavelength element being analyzed to obtain the characteristic information measured elements. Energy dispersive ray fluorescence spectrometer is used energy detector, by measuring the amount of charge collected by the detector, direct access to feature-ray energy emitted measured elements: Q = kE where, K is the photon energy of the incident radiation; Q is detected k for different types of energy response of the detector parameters; the corresponding amount of charge generated. The amount of charge proportional to the energy of the incident radiation, so by measuring the amount of charge available analyte feature information. When do RoHS testing most appropriate? A: RoHS Directive mandatory implementation time from ending today until July of next year, leaving only a little more than half a year's time, therefore, it should be said that the sooner the better Hua Wei ROHS detector, the sooner the more active, the more the later Passive Hua Wei UX-230, in fact a lot of the high sensitivity of large enterprises, the work already started, first, clear that the procurement of components, raw materials must be passed RoHS testing products Hua Wei ROHS spectrometer, The second is to own machine products RoHS testing while the majority of domestic and foreign buyers but also for manufacturers made a clear request, RoHS who did not pass the test of products will not sign a single. So, if your product does not do the test as soon as possible, the market will be lost, vain regrets. Hua Wei Sheng Ding UX-230_ Instruments (certified) _ Hua Wei Sheng Ding provided by the Dongguan City Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (www.dgshengding.com) Dongguan, Guangdong, dedicated instrumentation leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create Shengding instrument better future.