The rugged Fiber Optic Power Meter and LED Source Kit from Black Box are designed to precisely measure power loss in fiber optic components under field conditions. The fiber optic power meter and the LED source work together to measure power loss in fiber optic cable, connectors, attenuators, or other passive optical components. The fiber optic power meterThe fiber optic power meter is calibrated at four wavelengths: 850 nm, 1300 nm, 1310 nm, and 1550 nm. It measures power levels as high as +20 dBm and as low as -60 dBm. It features a true resolution of 0.01 dBm at all power levels so you can trust measurements below -45 dBm. Our fiber optic power meter provides response time up to five times faster than other units. In fact, at most power levels, readings are instantaneous. In relative measurement mode, the meter stores the zero reference reading for all four wavelengths independently in nonvolatile memory. This enables you to turn off the meter to save battery life as you move between testing locations. The meter also displays a 1-dB analog-type deviation pointer and an unaveraged mini display for real-time splice tuning. The meter stores up to 999 test results per wavelength. You can upload these readings to a PC for printing and analysis. LED sourceThe LED source supplies the temperature-stabilized light output the fiber optic power meter requires. It provides output wavelengths of 850 nm and 1300 nm through dual LEDs, which can be operated one at a time or simultaneously in CW, 30 Hz, 500 Hz, or 2 kHz modulation. Power optionsThe meter is powered with either four AA alkaline batteries (not included) or an AC wall pack containing four AA nickel-cadmium batteries (included). The nickel-cadmium batteries provide a full day's charge-up to 10 hours. And if you're in a hurry to charge them, an emergency quick-charge mode enables you to charge in one hour. The LED source uses a 9-volt alkaline battery (included). Stand up to field conditionsYou don't have to baby these devices. Both feature internal circuitry housed in a high-strength aluminum-extrusion case with high-impact rubber bumpers. They shrug off being bumped or dropped, making this kit a sturdy companion for field use. The Fiber Optic Power Meter and LED Source Kit comes with a waterproof carrying case, which protects the devices from moisture-even if they're submerged in several feet of water.