| HACH USA DR 2800 Portable Spectrophotometer with Lithium-Ion Battery Specifications DR 2800 Portable Spectrophotometer Performance Specifications Optical System Split Beam Operating Mode Transmittance ( % ) , Absorbance, and Concentration Source Lamp Tungsten Wavelength Range 340 to 900nm Wavelength Accuracy ± 1.5 nm Wavelength Resolution 1 nm Wavelength Calibration Automatic Wavelength Selection Automatic, based on method selection Spectral Bandwidth 5 nm User-entered Calibrations up to 50 Data Logging 500 points Automatic Method Recognition With TNTplus vial tests 10-fold Measurement and Averaging With TNTplus vial tests Display Backlit, greyscale LCD touch screen External Outputs USB ( 1 master, 1 slave) Cell Compatibility 1" square, 1" round, 1-cm square, 1-cm x 5-cm, Multipath 1" / 1-cm, 16-mm round, 13-mm round |