The Ermenrich NetGeeks NU20 optical multimeter is designed for testing fiber optic cables. You can measure the absolute optical power in any fiber optic system source measure the optical power lost in a cable and perform a continuity test to check if there are any breaks in the fiber optic cables. The optical multimeter is a must-have device for network cabling installers system administrators and fiber optic engineers to solve a wide range of professional tasks. The device can be used at home as well.

There are six wavelengths available. It supports single-mode and multi-mode cables and uses FC/SC/ST optical fiber connectors and an RJ45 network connector. The device has a built-in backlit screen with LED indicators and control buttons underneath. The device is powered by a rechargeable battery which is recharged through a Type-C USB cable. To save battery power the multimeter is equipped with an auto power-off function that activates after 30 minutes of inactivity.

Key features:

  • Optical power or loss measurement
  • Continuity test – searching for breaks in the network cable
  • Supports six wavelengths FC/SC/ST interfaces
  • Option to set the reference level
  • Powered by a rechargeable battery charged via a USB-type cable

The kit includes:

  • Transmitter
  • Remote module
  • Type-C USB cable
  • User manual and warranty card
Brand Ermenrich
Warranty years 5
EAN 5905555017020
Package size (LxWxH) cm 3.5x12.5x7.5
Shipping Weight kg 0.13
Optical power meter wavelength nm 850/980/1310/1490/1550/1625
Fiber connector type FC SC ST
Connector type RJ45
Maintained cable type single-mode (SM) multimode (MM)
Units of measurement dB dBm W
Power detection range dBm -60 — 8
Option to set the reference level yes
Continuity test yes
Display FSTN LCD
Display backlight yes
Power supply 3.7V 700mAh
Auto power off yes
Auto power off yes after 30 minutes of inactivity
Operating temperature range °C -10 — 60
Operating humidity range % 20 — 70
Type optical multimeter

Returns Policy

We have a 14-day return policy. If you are not satisfied with your purchase, please return it in its original packaging and be sure to put the original product packaging inside the shipping box to avoid any damage..

All items must be in their original condition and unused. The value of your purchase will be refunded. .

Shipping charges will not be refunded.

If the return is due to a defective product, you may be compensated for the return shipping.

Please contact us for more details if you need to make a return..


- From 0 to 2 kg - shipping cost: 12,50 euros.

- From 2.001 kg to 30 kg - shipping cost: 17,00 euros.

- From 30,001 kg - shipping cost: 30,00 euros.

In case of collection at our warehouse or resale points - the shipping is free.

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