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Keysight Used
  • Savings of up to 90%
  • Working Condition
  • Calibrated or Tested
  • 30-Day Right-of-Return
  • No Customization
  • Shipping to limited countries

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Keysight 81623C


Germanium Optical Power Head / 5mm Diameter

Keysight 81623C Germanium Optical Power Head / 5mm Diameter
Keysight 81623C Germanium Optical Power Head / 5mm Diameter
Keysight 81623C Germanium Optical Power Head / 5mm Diameter
  • Keysight 81623C Germanium Optical Power Head / 5mm Diameter
  • Keysight 81623C Germanium Optical Power Head / 5mm Diameter
  • Keysight 81623C Germanium Optical Power Head / 5mm Diameter

From USD*$4,978.80 Save 40% List Price 8,298.00 USD*

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Keysight 81623C Germanium Optical Power Head / 5mm Diameter
Keysight Used
Keysight 81623C
Germanium Optical Power Head / 5mm Diameter
Configuration: STD
Customization available
Shipping: Limited countries only
Warranty: 90 days
Accessories: Not included
Select condition
This will be taken into account for the value estimation of your unit.

KeysightCare Assured: Support. Elevated.
Add complete customer care to your order and get:
• 4-business-hour technical response
• Committed repair coverage
Learn more

Cannot ship to:

European Union

Unit only ships within China.

Unit ships worldwide.

Standard Keysight Used For professional and industrial use only
Condition Checked, working Calibrated units perform according to specification. Not calibrated units are operational tested/power up test.
DownloadsKeysight 81623C Data sheetKeysight 81623C User Manual
Support 90 days warrantyFor calibration & service plans contact us.5 years Keysight Care assured on eligible models The product may be End-of-Support
CalibrationTested or calibratedIf there is no certificate in the gallery above, the unit is tested but not calibrated.
AccessoriesNot includedFor help, please contact a Keysight expert
Shipping Limited countries only Check availability
Deal IDE2496103

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This InstrumentThis Instrument
Keysight Premium UsedKeysight Used
Save up to 70%Save up to 90%
Like New ConditionWorking Condition²
Firmware UpdatedFirmware as Listed
Fully CalibratedCalibration as Listed
New AccessoriesAccessories as Listed
Like-New Warranty
1–5 Years¹
90 days warranty
Customization PossibleLimited Customization

Contact us to check availability of any service, calibration plans, or the possibility to software. New accessories may be able to be added for the United States only. 


The new 81623C optical power head provides a 5 mm detector area and allows flexible placement of the remote optical power meter, which is then connected to the N7749C. The 81623C accepts parallel beams with up to 4 mm diameter, standard SM fiber and MM fiber with max. 100 μm core diameter, NA ≤ 0.3. A wide choice of adapters allows input from popular fiber connector types, bare fibers or open beams. The magnetic D-shaped adapters allow rapid removal and replacement without twisting attached fibers.

N7749C interface for two or four optical power heads

  • Controls the remote heads
  • Sample averaging times ranging from 100 µs to 10 s for all heads
  • Readout over LAN and USB interfaces with built-in web-browser GUI
  • SCPI command set common to Keysight optical power meters
  • Power values logged with dual-1M sample buffers for each head, to sample continuously with internal or external triggering
  • Uninterrupted simultaneous measurement and readout minimize overhead time for repetitive measurements
  • Family-wide, common trigger concept.

Analog output port perfect for automated alignment

  • Direct feedback for optimization processes like fiber alignment with analog voltage outputs, at the remote head itself and from the N7749C front panel
  • Either linear proportional to the optical signal power or logarithmic over decades of power levels.
See downloads for more details
Installed Options
See downloads for more details
90 days warranty
Contact us or request a custom quote to check availability of service plans.
Tested or calibrated
Get up to 10% discount on calibration plans ordered with your used Keysight instrument.
Contact us or request a custom quote to check availability.
No accessories included
To order additional accessories, please contact us or request a custom quote
Get up to 10% discount on software ordered with your used Keysight instrument.
Contact us or request a custom quote to check availability.


What are the differences between Keysight Used & Keysight Premium Used?

You will find more information about the differences of Keysight's used equipment standards here.

Can I configure a unit to meet my personal needs?

Customization is generally possible with our Keysight Premium Used equipment. The majority of our Keysight Premium Used equipment can be configured just the way you need it. Options can be added at additional cost.
Customizing Keysight Premium Used equipment might change the delivery and lead time of the item.

Some Keysight Used products cannot be customized. Use the contact option on the product page to check with the our eStore team.

What accessories are included?

Keysight Premium Used equipment typically comes with the same accessories and warranty as new products.

For Keysight Used products, the accessories included are mentioned in each listing on the Keysight Store on eBay or the Keysight Alibaba store.

Can you include other accessories?

We currently only offer those accessories which are part of the listing. Other accessories can be purchased separately at extra cost with your purchase of a Keysight Used or Keysight Premium Used unit.

Please mention in the comment field which additional accessories or support you are interested in.

For seperate or post-purchase ordering, please contact your local Keysight office or Keysight Partner.

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