Use the new gold standard in IRMS. The new Thermo Scientific™ 253 Plus™ once again redefines high performance for isotope ratio mass spectrometry, by building on the robustness, linearity, and sensitivity only available in the Thermo Scientific™ 10 kV IRMS technology. Technical innovations for the Thermo Scientific™ 253 Plus™ improve sample utilization, stability, background and signal-to-noise this way resulting in ultimate precision on smallest sample sizes.