The DASA System

The Instrumentation


                                                                                            SacchAAr 880D Series 3 Dual wavelength
                                                                                                                    polarimeter (589nm and 880nm) with unique
                                                                                                                   'Dextran Mode' software.

Printer (optional)

We can supply both 80 column dot-matrix
and 24 column thermal printers.
Both feature a serial interface.

                                                                                            Thermocirculator for high precision temperature
                                                                                                                    control.

                                                                                                                    The SacchAAr 880D has a temperature sensor, but for
                                                                                                                    the very best results, a high accuracy thermocirculator
                                                                                                                    is recommended Optical Activity can supply the best at
                                                                                                                    reasonable cost

RPD-2 rotator and pump for agitating the sample during the
7 minute incubation time and for filling and emptying the
polarimeter cell between tests. Both pieces of technology are
essential to ensuring the repeatability, reproducibility and
accuracy of your results.

The pump is automatically controlled by the SacchAAr 880D
with little user intervention required; the rotator is set for the
optimum time of 7 minutes.

                                                                                               Index Instruments Refractometer
                                                                                                                       (optional) for standard purity measurements. Also
                                                                                                                       allows results to be displayed as dextran on brix.
                                                                                                                       This model, the TCR 15-30, features automatic
                                                                                                                       temperature control by Peltier Cell and can be
                                                                                                                       used as a stand-alone refractometer

PF 750 Pressure Filter Device for reducing sample
preparation to less than a minute, ensuring minimal sample
evaporation and no dextran removal.

The consumables consist of the filtration media (paper and

filter aid) and the individual test vials, which are available
as an enzyme impregnated paper strip inside a custom made
bottle (one bottle per test).

Upgrades to existing OA polarimeters can be offered if the
instrument is one of the following:

SacchAAr 880 3 Series (no other SacchAAr models are suitable)

PolAAr 3000

PolAAr 3001

PolAAr 3002

PolAAr 3005