The Ermenrich NetGeeks NP40 multifunctional is a digital cable tester that is designed for tracing twisted pair and telephony testing lines for faults and installation errors measuring cable lengths and the distance to open or short circuits. The device will become an effective tool for technicians deploying and maintaining a computer or telephone network in an office at a facility or at home.

In the base mode of operation the device can check the wires within the cable for damage: open circuits short circuits crossed pairs. In the cable length measurement mode you can measure the total cable length within 200 meters as well as the distance to the break. TDR measurements high accuracy and calibration can be performed if needed.

The Port Flash function can be used to find the exact port on the network switch or router to which the target cable is connected. The PoE test identifies the PSE type and detects midspan/endspan. The device also measures voltage and polarity. The tester receiver can be set to NCV mode for non-contact voltage detection.

The transmitter and receiver are powered by batteries (not included).

Key features:

  • Cable tracing testing lines for faults and installation errors
  • Cable length measurement with the TDR technique (pulse reflectometry)
  • Measuring the distance to open or short circuits
  • PoE test with voltage measurement identification of a PSE type midspan/endspan identification
  • Port Flash and NCV functions powered by batteries

The kit includes:

  • Transmitter
  • Receiver
  • Remote unit
  • RJ11 patch cord
  • RJ45 patch cord
  • Alligator clip
  • DC cable
  • Earbuds
  • Type-C USB cable
  • Carry bag
  • User manual and warranty card
Brand Ermenrich
Warranty years 5
EAN 5905555016948
Package size (LxWxH) cm 23x16.5x4.5
Shipping Weight kg 0.43
Cable length measurement yes
Cable tracing yes
PoE test yes
Voltage polarity detection yes
Measuring range m 2.5 — 200
Error 3 (±0.5m/1.6ft)
Measuring the distance to open circuits yes
Measuring the distance to short circuit yes
=== Delimiter === PoE test
Midspan/endspan identification yes
Operating voltage range (DC) V 5 — 60
Display resolution px 128х64
Display backlight yes
Ports PoE Scan Length/Flash Cont
Tracing cable types telephone common wires STP/UTP (CAT5E CAT6 CAT6A) network cable
Testing cable types STP/UTP (CAT5E CAT6 CAT6A) network cable
Maximum length of the tested cable m (ft) 600 (1970)
Cable testing + (open circuits short circuits crossed pairs reversed pairs split pairs crosstalk)
Port flash function + (full duplex/half duplex auto-nego/non-auto-nego 10/100/1000Mbit/s)
Measuring method Time-domain pulse reflectometry (TDR)
Units of measurement meters/yards feet
Calibration +
Minimum cable length for calibration m (ft) 10 (32.8)
Calibration error % 2 (±0.5m/1.6ft)
Power source equipment (PSE) type test standard (IEEE 802.3at/af)/non-standard
Maximum operating current mA <150
Protection input voltage: 48V current: 5mA
Display LCD
Power supply charging via a USB Type-C cable (included) 3 rechargeable AAA batteries (not included)
Low battery status indicator yes
Auto power off 15 min 60 min 30 min
Operating temperature range °C −10… +60 (14… 140)
Operating humidity range % 20…70
Ports RJ45 earbuds
Adjustable sensitivity yes
Non-contact voltage detection (NCV) yes
Flash light yes
Maximum operating current mA <100
Power supply 9V battery (not included)
Operating temperature range °C −10… +60 (14… 140)
Operating humidity range % 20…70

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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