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We offer many accessories and services for our cesium products. We also offer products designed to extend the life of your unit, and we can assist with disposal of your cesium reference at the end of its life.

Direct-Replacement Cesium Beam Tubes for 5071A Key Features


  • Self-install or factory replacement options
  • Extend lifespan of Primary Frequency Standard (PFS)
  • High-performance and standard-performance options
  • 5-year warranty for high-performance tubes
  • 10-year warranty for standard-performance tubes
  • Field kit provided with necessary material and instructions

Service and Repair


We provide technical support, service and repair for all our atomic system clocks. Our technical support team provides over-the-phone assistance with troubleshooting instructions and information on how to request a repair if necessary. Our teams can also perform cesium tube replacement installation and assist with disposal of the cesium product when it reaches the end of its operating life. We also offer calibration services for all our atomic system clocks. Our extended warranties are available at the time of purchase for many models. 

Available Cesium Accessories, Replacement Parts and Services


Instrument Description of Accessory, Replacement Part or Service Part Number
5071A High-performance cesium beam tube replacement 10891A
5071A Standard-performance cesium beam tube replacement 10890A
5071A Replacement battery 1420-514
5071A Shipping kit for cesium beam tube for returns to Microchip 59991-91102
5071A Shipping kit for 5071A for returns to Microchip 59991-91105
5071A Certificate of calibration (for new instrument only) 5071A-H57
5071A NIST 77110C Characterization of Atomic Frequency Standards 5071A-H03
5071A Copy of production final test results (for new instruments only) 5071A-H27
5071A Rackmount flange kit for use with handles 5071A-913
5071A Rackmount flange kit no handles 5071A-908
5071A Rackmount slides 1494-0059
5071A, PRS-4400,
PRS-4500, 4310B
Return to factory calibration 999-72000-40
5071A, PRS-4400,
PRS-4500, 4310B
Cesium beam tube disposal 999-72000-81
4310B Portability conversion kit 14959-101
4310B, PRS-4400,
PRS-4500
Monitor 3 software Contact factory
4310B, 8040C Certificate of calibration (for new instruments only) 1019-002
PRS-4400, PRS-4500,
8040C, 4310B
Copy of production final test results (for new instrument only) TEST DOC CHARGEABLE
8040C Return to factory calibration 999-72000-41