The EVOQ and the EVOQ Elite mass spectrometers feature vacuum-insulated probe-heated electrospray ionization technology, an active exhaust atmospheric pressure ionization source with an orifice vacuum interface, an interlaced quadrupole dual funnel that is flat-tuning and increases the sensitivity of the instrument, and PACER software, which enables exception-based data review, a feature that reduces the error rate for quantitative analysis.