Agilent 240Z AA Based on the sensitive AC-modulated Zeeman technique, proven to give the best detection limits of any Zeeman spectrometer, the 240Z AA, with up to 4 fixed lamp positions offers the highest sensitivity, performance, simplicity of operation and industry-leading software in atomic spectroscopy. The instrument is supplied with the GTA 120 Zeeman graphite tube atomizer for superior graphite furnace performance and is controlled by our acclaimed Windows-based Worksheet software. Enhanced detection limit performance—For ultra trace-level detection limits, plug in high-intensity UltrAA lamps. No additional power supply is required. Optimized performance— PC-controlled magnetic field strength can be varied from 0.1 to 0.8 Tesla; the field strength remains locked during measurement, minimizing effects of mains voltage variations.