Pocket Colorimeter II Filter Photometer, user-programmable, 420 nm filter.
Generic Pocket Colorimeter II Instruments are intended for applications not included in standard analysis systems. They are available in a range of wavelengths appropriate for many custom calibrations. In addition to the factory absorbance calibration (0-2.5 A), the instruments offer two user-entered, two-point, linear calibrations, and provide a choice of either 0.00 to 2.55 or 0.0 to 99.0 for the display value.