Chromatopak Analytical Instrumentation [India] Pvt. Ltd. Supplies Diluter / Dispenser Sampling Instruments. Chromatopak Analytical Instrumentation [India] Pvt. Ltd. Manufactures columns, consumables and accessories for HPLC, GC, IC, SPE etc. Diluter / Dispenser Sampling Instruments is accurate and save time. Diluter / Dispenser Sampling Instruments saves reagent and the volumes are easily programmable. The diluter of this sampling instrument simplifies the preparation of sample and sample dilution. The dispenser of this instrument simplifies sample preparation requiring aliquot or serial dispensing.