This is the high-power version of RMT's popular fiber test combo — the kit to grab if you work CATV, RFoG, or PON plant where optical levels run hot.
The ST800K-A power meter measures from -50 all the way up to +26 dBm, headroom that cheaper meters simply don't have, so you can read amplifier and transmitter outputs directly without saturating the detector. (Working low-power links like long-haul or splitter-heavy FTTH legs? See our companion kit with the ST800K-C meter, which trades top-end range for -70 dBm sensitivity.)

Paired with the ST815 laser source putting out stable 1310 nm and 1550 nm light through a single port, this kit handles the two jobs field techs do every day: absolute power measurement at any point in the plant, and end-to-end insertion loss testing using the meter's relative (dB) mode.
Both units read and generate tone-modulated light (270 Hz, 1 kHz, 2 kHz) for identifying a specific fiber in a bundle.

Everything is field-practical: rugged housings, big backlit LCDs, auto-off to save batteries, 150-hour meter runtime on standard AAs, and interchangeable FC, SC, and ST adapters in the box.
An affordable, complete starting point for new fiber techs and a dependable truck spare for veterans.

• Calibrated wavelength points: 850, 1300, 1310, 1490, 1550, and 1625 nm (800-1700 nm test range)
• Absolute power in dBm or xW; relative power (loss) in dB
• Detects and indicates 270 Hz, 330 Hz, 1 kHz, and 2 kHz tone-modulated light for fiber identification
• InGaAs detector; 0.01 dB logarithmic resolution
• Interchangeable FC, ST, and SC adapters included (FC pre-installed)
• Large backlit LCD; auto-off; low-battery indication; runs 150 hours on 4x AA

• Stable dual-wavelength output: 1310 nm and 1550 nm from one port
• Continuous wave (CW) plus 270 Hz, 1 kHz, and 2 kHz modulated output for fiber identification
• FC, SC, and ST optical interfaces
• Backlit LCD, auto-off, battery voltage display

• 1x ST800K-A Optical Power Meter (-50 to +26 dBm)
• 1x RMT-ST815 Laser Source (1310/1550 nm)
• 2x FC adapters (pre-installed), 2x SC adapters, 2x ST adapters
• 6x AA batteries and 2x operation manuals

• Meter Range: -50 to +26 dBm
• Wavelength Range: 800-1700 nm; calibrated at 850/1300/1310/1490/1550/1625 nm
• Detector: InGaAs
• Resolution: 0.01 dB (log); 0.1% (linear)
• Source Output: 1310/1550 nm, CW or 270 Hz / 1 kHz / 2 kHz modulated
• Connectors: FC, SC, ST
• Meter Battery Life: 150 hours (4x AA)
• Operating Temp: 14°F to 122°F (-10°C to +50°C)
• Warranty: 1 Year