TM501 Live Optical Fiber Identifier with OPM — Fiber Traffic Identifier + Optical Power Meter + 10mW VFL, 800-1700nm, 0.25/0.9/2.0/3.0mm, Detects 270Hz/1KHz/2KHz, 145g Lightweight

The QIIRUN TM501 is a professional 3-in-1 fiber optic instrument combining an Optical Fiber Identifier (OFI), Optical Power Meter (OPM), and Visual Fault Locator (VFL) in a single 145g handheld device — engineered for FTTH installers, telecom field engineers, and fiber splicers who need complete fiber diagnostic capability without carrying multiple tools.TECHNICAL SPECIFICATIONS OFI Function: Detects live fiber traffic at 270Hz, 1KHz, and 2KHz; wavelength response 800–1700nm Supported Fiber Diameters: 0.25mm (bare), 0.9mm (tight-buffered), 2.0mm, 3.0mm (jacketed) OPM Function: Calibrated wavelengths 850 / 1300 / 1310 / 1490 / 1550 / 1625nm; Range: -50 to +26dBm VFL Function: 650nm red light, fault detection up to 10–15km Connector: Universal 2.5mm interface (SC / FC / ST / LC compatible) Power Supply: 2×AA alkaline batteries (excluded); low-battery LED indicator Weight: 145g |Dimensions: 220×38×28mm | Display: LED color screenWHAT'S IN THE BOXQIIRUN TM501 3-in-1 Fiber Identifier × 1 | Carrying Pouch × 1 | User Manual × 1FREQUENTLY ASKED QUESTIONS Q: Can I use the OPM to measure signal power on a live FTTH fiber?A: Yes. The OPM function measures signal power on connected fibers using the universal 2.5mm interface(SC/FC/ST/LC compatible). It is calibrated for all standard FTTH wavelengths including 1310nm, 1490nm, 1550nm, and 1625nm. Measurement range is -50 to +26dBm.Q: Is it compatible with FTTH single-mode fiber and data center multimode fiber?A: Yes. The OFI detects signals on both single-mode (G.652, 1310/1550nm) and multimode fiber across the 800–1700nm range. The OPM is calibrated for standard FTTH wavelengths (850, 1300, 1310,1490, 1550, 1625nm) and works with all common fiber connector types via the 2.5mm universal interface.

• LIVE OPTICAL FIBER IDENTIFIER FOR IN-SERVICE FIBER TRAFFIC: The TM501 identifies and traces active fibers carrying live optical traffic without cutting or disconnecting — no service interruption. Functions as a professional fiber traffic identifier that clamps directly onto 0.25mm, 0.9mm, 2.0mm, and 3.0mm fibers to detect signal presence, relative power level, and traffic direction in seconds. Recognizes modulated signals at 270Hz, 1KHz, and 2KHz across the 800–1700nm wavelength range. Works on single-mode and multimode fiber. Essential for FTTH technicians, telecom engineers, and data center teams.
• BUILT-IN OPTICAL POWER METER (OPM) — MEASURE FIBER SIGNAL STRENGTH ON THE SAME TOOL: The TM501 integrates a calibrated optical power meter that measures fiber signal power across six standard wavelengths: 850 / 1300 / 1310 / 1490 / 1550 / 1625nm. Measurement range: -50 to +26dBm. Use as a fiber light meter to verify signal levels at FTTH splice closures, distribution boxes, and patch panels — identify signal loss, verify connector quality, and confirm link budget compliance without carrying a separate OPM instrument. The universal 2.5mm connector accepts SC, FC, ST, and LC adapters.
• VISUAL FAULT LOCATOR — THREE TOOLS IN ONE DEVICE: The built-in 10 mW Visual Fault Locator emits a 650nm visible red light to pinpoint fiber breaks, micro-bends, faulty splices, and damaged connectors up to 10–15km along the fiber. The TM501 gives field technicians a complete fiber diagnostic workflow in a single handheld instrument. No adapter changes required between functions. The universal all-in-one metal clamp accommodates all supported fiber diameters without block replacement.
• THREE-IN-ONE FIBER TESTER FOR FTTH, TELECOM & DATA CENTER PROFESSIONALS: Designed for fiber splicers, FTTH/FTTB network installers, outside plant technicians, and NOC field engineers. Replaces three separate instruments — optical fiber identifier, optical power meter, and visual fault locator — in a single 145g device that fits in a shirt pocket. LED color display is readable in direct sunlight and low-light underground environments.
• LIGHTWEIGHT & RELIABLE OPTICAL FIBER TESTER — 145g, SINGLE-KEY OPERATION: Single-key operation switches between OFI, OPM, and VFL modes with no menus or complex setup. The metal all-in-one clamp grips 0.25mm, 0.9mm, 2.0mm, and 3.0mm fibers directly — no clamp block replacement when switching fiber sizes. Powered by 2×AA batteries with a low-battery LED indicator.