NOYAFA PoE Checker NF-8504 Ethernet cable tester with LCD display, PoE detection

NOYAFA PoE Checker NF-8504 is a compact Ethernet cable tester and PoE detector for network installation and troubleshooting. The device verifies RJ45 cable continuity and wiring for CAT5/CAT6 (STP/UTP), measures cable length, identifies PoE presence and standard (IEEE 802.3af/at/bt or non-standard), and provides voltage, current and power readings. The tester includes a main unit with a 2.4-inch color LCD and a detachable remote unit for in-wall or patch-panel checks, and operates from a built-in rechargeable 1500 mAh battery.

Advantages

The NF-8504 combines wiremap verification, PoE analysis and cable length measurement in a single handheld tool. It supports detection of standard and non-standard PoE, measures DC voltage from 5–60 V and estimates power delivery (2–80 W), while protecting the unit from accidental live voltages up to 60 V. A 2.4-inch backlit color display shows test results clearly, and a detachable RJ45 remote enables testing across patch panels and in-wall runs. Rechargeable USB-C power and configurable auto-off times extend field usability.

Suitable for

• Network installers testing new CAT5/CAT6 cable runs
• IT technicians verifying PoE availability and standards on switches and injectors
• Field service personnel locating cable faults and breaks up to 300 m
• Engineers identifying active switch ports using port flash at 10/100/1000 Mbps

Key specifications

• Supported cables: CAT5/CAT6 (STP, UTP)
• Cable length range: 5–300 m
• PoE voltage range: DC 5–60 V
• PoE standard detection: IEEE 802.3af / IEEE 802.3at / IEEE 802.3bt / Non-standard
• Power measurement range: 2–80 W
• Display: 2.4-inch color LCD with backlight
• Battery: built-in 3.7 V, 1500 mAh lithium-ion, rechargeable via USB Type-C
• Network speed support: 10 / 100 / 1000 Mbps
• Auto power-off: 5 / 15 / 30 / 60 minutes
• Dimensions: 138.5 × 76 × 30 mm; Weight: 400 g
• Warranty: 24 months

How to use

Connect an RJ45 cable between the NF-8504 main unit and the device or cable under test, or attach the remote unit at the far end for in-wall or patch-panel checks. Select the desired test mode on the device to perform wiremap/continuity checks, measure cable length, or run PoE detection. For port identification, use the port flash function to blink switch LEDs and determine link speed and duplex. Recharge the internal battery using the USB-C port when needed.

Usage recommendations

When testing live networks, observe standard safety practices. Use the NF-8504 to verify PoE presence and polarity before connecting sensitive equipment. Allow the tester to charge fully and set an appropriate auto-off interval to conserve battery during extended field work.