Buy this now. The current price is great. If you wait, the price may increase.
The WP-110RS Model features a 10nm slit width and is designed to be used with 1/2" (13mm) round tubes or 10mm square cuvettes (an adaptor is supplied at no additional charge for 10mm square optical glass cuvettes). The WP-110RS is reliable and easy to use featuring automatic zeroing, one-touch blanking, and built-in automatic filters for easy operation. The large screen graphic LCD are easy to read and gives quick accurate readings in Absorbance, Transmittance, Factor, and Concentration. Each option can easily be selected with using the Mode button located on the control panel. High quality silicon photodiode detector and 1200 lines/mm grating assures high performance, while second order filters are built-in and automatically adjust as the wavelength is set.