Colorimeters that can be powered by main electric supply as well as battery. These can effectively determine the level of absorbance of certain wavelength of light. Our colorimeters are highly appreciated for the accurate readings of the solute concentration in the given specimen solutions. This product is well received in the domestic and international markets. TECHNICAL SPECIFICATIONS Blank Wavelength range 400 to 700 nm Resolution 0.01 Absorbance 0 - 1.99a Photo detector silicon photodiode/photo cell Display 2 � digit led Light source 6.8v, 0.3 amp. Tungsten lamp Sample system 10mm path length matched glass test tubes High std.glass filters 8 filters Filters 400,420,480,500,520,540,620,680 nm Weight 3 kg (approx.) Power supply 230v ac � 10% , 50hz with in-built stabilizer Accessories test tube set of 5, spare light source, dust cover, Instruction manual.