The 5061B Cesium Beam Standard is a high-performance unit that includes unique dual-beam optics with higher beam intensity to accomplish better short-term stability and greater immunity to effects of shock and vibration. The intrinsic accuracy is 2x10E-12 which provides an excellent reference standard without need of calibration.
Options:
003 = Clock Frequency Standard
004 = High Performance Beam Tube
908 = Rack Flange Kit