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The EXFO FiberBasix EPM-50 is a professional-grade optical power meter trusted by fiber optic technicians worldwide for its exceptional 300-hour battery life, high-accuracy InGaAs detector, and rugged field-ready design. Whether you're performing insertion loss testing on an FTTH network, verifying optical power levels in a data center, or maintaining telecom infrastructure, the EPM-50 delivers reliable, repeatable measurements with 0.01dB resolution and ±5% power uncertainty.
Compact at just 500g and powered by standard 3 AA batteries, the EPM-50 is the go-to optical power meter for field technicians who need a dependable, low-maintenance tool that won't run out of power mid-job. Pair it with the EXFO ELS-50 light source for a complete, matched insertion loss test set.
| Detector | InGaAs |
| Fiber Types | Single-mode (SM) and Multimode (MM) |
| Resolution | 0.01 dB |
| Power Uncertainty | ±5% |
| Display Units | dB, dBm, W |
| Modulation Recognition | 270 Hz, 1 kHz, 2 kHz |
| Reference Setting | Yes (for insertion loss measurement) |
| Battery | 3 × AA batteries |
| Battery Life | 300 hours |
| Weight | 500 g |
| Power Supply | Battery only (3 × AA) |
The EXFO EPM-50 is an optical power meter used to measure optical power levels and perform insertion loss (IL) testing on fiber optic networks. It is commonly used in FTTH/FTTx deployment, data center fiber commissioning, telecom maintenance, and CATV network verification.
The EPM-50 runs on 3 standard AA batteries and delivers an exceptional 300-hour battery life — far longer than most competing optical power meters. This makes it ideal for extended field deployments without the need for recharging or carrying spare battery packs.
Yes. The EPM-50's InGaAs detector supports both single-mode (SM) and multimode (MM) fiber, making it versatile for a wide range of fiber optic testing applications.
The EPM-50 can recognize modulation tones at 270Hz, 1kHz, and 2kHz, allowing technicians to identify signal sources and perform tone-based fiber identification in live or multi-fiber environments.
The EPM-50 is designed to pair with the EXFO ELS-50 light source for a complete, matched insertion loss test set. Using matched EXFO equipment ensures calibration consistency and accurate IL measurements.
The EPM-53 and EPM-53X are variant models in the EXFO FiberBasix EPM series. Key differences include wavelength range, connector compatibility, and measurement range. Please refer to the variant comparison table or contact us for guidance on which model best suits your application.
The EPM-50 offers 0.01dB resolution and ±5% power uncertainty, providing the measurement accuracy required for professional fiber optic insertion loss testing and optical power verification in both field and lab environments.
Yes. The EPM-50 is widely used for FTTH and FTTx fiber testing, including verifying optical power at ONTs, measuring splice and connector loss, and performing end-to-end insertion loss tests on fiber drops and distribution networks.