General Lab Catalogue - Crison Instruments - #101

CRISON has more than 25 years' experience in the manu­facture of potentiometrictitratorswhich has given us in-depth knowledge of the kind of instruments required for precise handling of liquids. In labs the continual demand for increased productivity means that routine tasks need to be automated as far as possible, such as:

• Preparing solutions.

• Repetitive reagent dispensing.

• Dilution of standard solutions.

• Titrations with indicator.

• Reagent pipetting.

CRISON's contribution in this field has been to offer a high-quality range of precision burettes at reasonable prices. These burettes fill the gap between manual digital dis­pensers and expensive motorised precision burettes. The new range comprises:

• The Burette 1S, a single-syringe burette.

• The MultiBurette 2S, a 2-syringe burette.

• The MultiBurette 4S, a 4-syringe burette.

These models all come in two different versions, accord­ing to use:

- D, with Dispense function, titration and auto-cali­bration.

- DPD, with Dispense, Pipette and Dilute function, and titration and auto-calibration.

• Customised Burettes, based on the models described above, which can be adapted to each client's particular requirements.

By operating the Multi-Burettes from a PC, the operator can perform multiple and simultaneous dispensings.

In the 2S and 4S Multi-Burette, the two or four syringes are actioned via a single mechanism. The syringe plungers can remain free or be attached to the cursor.

The cursor in movement drags the plungers of the at­tached syringes.

Only one reagent is dispensed: the one from the valve which has been activated.

The other syringes will return the reagent to the original bottle. This makes it easy to handle different reagents with dif­ferent programmes via a single module.

A summary of the various possibilities offered by the new range of CRISON burettes is given below.

Dispensing

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User

actuation

There are three essential compo­nents to the burette:

• High-resolution plunger dis­placement mechanism, actioned by a stroke-by-stroke motor.

• The precision syringe, which can be of different volumes, de­pending on the client's require­ments.

• Instantly switcheable reagent input and output electrovalve. This is a great improvement over motorised valves, which are much slower.

Volume dispensed

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On Off

User

actuation

Volume dispensed

t