Karvinger Optical Power Meter 4-in-1 Fiber Optic Tool with VFL, RJ45 Tester & LED Light Rechargeable Fiber Light Meter for 8001700nm Signal Testing Network Maintenance Device

4-in-1 Optical Fiber Tool for Field Technicians- The Karvinger KPMOY9 combines four essential functions in one device: an optical power meter, a 650nm Visual Fault Locator (VFL), an RJ45 cable tester, and a built-in LED inspection light. Designed for fiber optic installers, technicians, and network engineers, it provides a compact, rugged, and portable solution for professional use in the field or on-site testing.
High-Precision Optical Power Measurement- Measure absolute and relative optical power across a wide wavelength range of 8001700 nm using a sensitive InGaAs detector. Displays results in dBm and mW or nW, with 0.01 dB resolution. Easily switch between units and use the REF function to set a 0 dB reference. Ideal for accurate testing of fiber signal strength in live fiber optic installations or maintenance operations.
RJ45 Cable Testing for Network Diagnosis- The integrated RJ45 tester allows you to verify Ethernet cable continuity and wiring directly from the device without additional tools. Detect miswiring or open pairs in network cables quickly and efficiently. A must-have feature for field engineers performing hybrid fiber and copper network maintenance or testing LAN and telecom infrastructure.

One Device for Every Fiber and Copper Job

The KPMOY9 combines an optical power meter, a 650nm visual fault locator, an RJ45 cable tester, and an LED work light in a single rugged handheld unit. Carry less gear, move faster on every call, fiber and copper, handled with one tool.

4-in-1 Kit

Karvinger OPM

Optical Power Meter

Reads absolute and relative optical power from 800–1700nm at 0.01 dB resolution. A sensitive InGaAs detector delivers precise, repeatable readings, with dBm / mW / dB switching and a 0 dB reference for consistent testing.

Karvinger OPM

650nm Visual Fault Locator

A bright 10mW red light traces breaks, sharp bends, and macrobends, and confirms continuity on both singlemode and multimode fiber.

Karvinger OPM

RJ45 Cable Tester

A full wiremap instantly flags broken terminations, mismatched pairs, and ghost connections on Ethernet runs : far more than a blinking-light tester.

Karvinger OPM

LED Work Light

A built-in LED lights up dark closures, handholes, and cabinets, so you can read connectors and work without a third hand.

Accurate Readings, All-Day Endurance

Precision You Can Trust

A sensitive InGaAs detector reads live fiber confidently across 800–1700nm at 0.01 dB resolution, with easy dBm / mW / dB switching and a 0 dB reference for repeatable results.

Built to Take a Beating

A high-impact ABS shell with a rubber grip shrugs off knocks in a tool bag or on site, so it holds up job after job in real field conditions.

All-Day Runtime

Up to 20 hours on a single charge, rechargeable over USB-C from a wall plug, laptop, or power bank. No disposable batteries to chase down.

At a Glance

InGaAs detector for precise, repeatable readings
0.01 dB resolution across the full 800–1700nm range
20-hour Li-ion battery, rechargeable over USB-C
High-impact ABS housing with a comfortable rubber grip
SC / FC / ST connectors, plus an FC-to-LC adapter in the box
Works on singlemode and multimode fiber

Technical Specifications

Tools	Power meter · VFL · RJ45 tester · LED light
Wavelength range	800–1700 nm
Resolution	0.01 dB
Detector	InGaAs
VFL output	10 mW @ 650 nm
Battery	Li-ion, up to 20 h runtime
Charging	USB-C

Housing	High-impact ABS
Dimensions	5.52 × 2.76 × 1.38 in
Weight	7.2 oz
Fiber connectors	SC / FC / ST + LC adapter
Copper	RJ45 continuity & wiremap
Certifications	CE · FCC · RoHS

	KLFO50 - Visual Fault Locator 40km	KPMOY9 - Optical Power Meter	KIFOS2 - Optical Fiber Identifier with EasyClamp Technology	KEFOK6 - Professional Fiber Optic Fusion Splicer Machine

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Rechargeable	?	?	?	?
Optical power meter	no data	?	no data	?
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RJ45 tester	no data	?	no data	no data
Detects live fibers	no data	no data	?	no data
Fusion splicing	no data	no data	no data	?
Best for	Long-range fault tracing	Daily fiber + Ethernet testing	Working live networks safely	Permanent fiber joins