PR-680L SpectraDuo marks the beginning of a new era in light measurement. This unique patent pending, battery powered portable instrument is the first and only combined fast-scanning 256 detector element spectroradiometer and PMT based photometer on the market.The PR-680L is supplied with 4 Automated Measuring Apertures (1°, 0.5°, 0.25° and 0.125°) and an Automated Measure Shutter. Other hardware features include AutoSync® for automatically synchronizing to the source refresh rate insuring the utmost accuracy, a Secure Digital (SD) port for measurement storage, an External Trigger Port allowing remote measurement activation from either a push button or peripheral device, and a long lasting rechargeable Lithium-Ion (Li-Ion) battery.The PR-680L is controlled via the on-board, 2.25" x 3" high resolution, full color touch screen LCD display and 5-way navigation keypad for easy navigation. Following a measurement, the PR-680L displays data and color spectral graphs on the system display. The PR-680L design provides stand alone operation - no PC required. The PR-680L can also be controlled via the world famous SpectraWin™ 2 software over the USB, RS232(optional) or Bluetooth (optional) interface.The unique design of the PR-680L makes tasks such as spectrally based colorimetry and high speed, low level luminance - required for display metrology - possible with a single instrument by supplying a wide dynamic range - 0.00007 fL (photometer and 1° aperture) to 5,000,000 fL (spectral and 1/8° aperture) without using external neutral density filters. Since the Pritchard® viewing and measuring optics are shared by both the spectroradiometer and photometer, no realignment of the instrument to the target is required when switching between modes.