The Jonard FPM-50S packs three testers a fiber tech reaches for daily into one pocket-sized meter: an optical power meter, a visual fault locator, and an RJ45 network cable tester.
As a power meter it measures both absolute optical power (dBm) and relative power loss (dB) from -50 all the way to +26 dBm — enough top-end headroom to read hot CATV and PON transmit levels directly — across a wide 800-1650 nm range with 10 preset calibrated wavelengths and a fine 0.01 dB resolution.

The built-in 2 mW visual fault locator earns its place the first time you need it: shoot visible red light down a fiber and breaks, macrobends, and bad connectors glow through the jacket — no separate VFL pen to lose.
And when the job includes copper, the built-in remote tests RJ45-connected network cables for continuity and wiring faults, saving a second tester on the belt.

Field-practical details round it out: a backlit LED screen readable in dark closets and vaults, 10-minute auto-off to preserve batteries, and included FC and LC adapters so common connectors plug straight into the meter.
The FC/SC adapters accept APC, PC, and UPC polished connectors. For a tech who wants one small instrument covering power, loss, fault location, and copper continuity, the FPM-50S is a remarkably complete kit.

• Measures absolute power (dBm) and relative loss (dB) from -50 to +26 dBm
• Wide wavelength range: 800-1650 nm with 10 preset calibrated wavelengths
• Fine 0.01 dB resolution
• Built-in 2 mW visual fault locator (VFL) for finding breaks and macrobends
• Built-in RJ45 network cable tester with remote
• Backlit LED screen for low-light work
• 10-minute auto-off preserves battery life
• Includes FC and LC adapters (FC/SC compatible with APC/PC/UPC connectors)

• Model: Jonard FPM-50S
• Power Range: -50 to +26 dBm
• Wavelength Range: 800-1650 nm (10 calibrated wavelengths)
• Resolution: 0.01 dB
• VFL: Built-in, 2 mW
• Cable Test: RJ45 with included remote
• Adapters: FC and LC included
• Display: Backlit LED, 10-min auto-off