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28.04.2020

MORE PRODUCT FOR LIQUID HANDLING PRODUCT

Hirschmann have been used in laboratories for over 50 years and in over 100 different countries all around the world.


HIRSCHMANN Liquid Handling Products

  • Peristaltic pumps
  • Liquid Handling
  • Volumetric measuring instruments
  • Sterile plugs

Products from Hirschmann have been used in laboratories for over 50 years and in over 100 different countries all around the world. You can find the best pricing and promotions on our Fleischhacker website for new and refurbished HIRSCHMANN pipette fillers or controllers, pipettes and motorized or classic bottle top dispensers. HIRSCHMANN pipette fillers and controllers assist liquid handling by increasing efficiency, speed, and precision. Key HIRSCHMANN pipette products include the HIRSCHMANN Pipetus and Pipetus Jr. Controllers and HIRSCHMANN Ceramus, Opus Bottle Top and Solarus Bottletop Dispensers.


HIRSCHMANN Certified quality

Maximum quality is a guiding principle at Hirschmann Laborgeräte when it comes to processes in development, production and administration. But procedures only govern the way to realise tasks - the conscious commitment in the minds of employees is the decisive element. And, in this respect, we are especially proud that our employees live and breathe real quality on a daily basis. This is equally demonstrated in the selection of materials, the training of employees and the provision of suitable working equipment. The combination of these individual factors guarantees the quality of our products - not incidentally, but in a very conscious, planned and permanent manner.??An outward symbol of quality production are the currently valid certifications:

  • DIN EN ISO 9001:2015
  • DIN ISO 14001:2009
  • EMAS III 1221/2009
  • DIN EN ISO 13485:2012+AC:2012

HIRSCHMANN KNOWLEDGE

I. Glass shapes - selection

Measuring flasks Measuring flasks are available in different forms, including tapered or pear-shaped examples. The surface on which the measuring flask stands should be of an adequately large area to prevent it wobbling or turning. The nominal volume is indicated by a ring mark on the neck of the flask. Measuring flasks are available with or without a closure plug. They are calibrated for IN.???Measuring and mixing cylinders Three measuring and mixing cylinder designs are defined in the standard:

  • tall version with spout
  • tall version with plug
  • short version with spout

They have a hexagonal or round base. The neck of cylinders with plugs has a so-called tube socket on the inside at the top to ensure that the plug fits exactly. The volume is measured with graduation marks or main point ring graduation. It begins with zero at the base and extends up the cylinder to the nominal volume. Measuring and mixing cylinders are calibrated for IN.???Pipettes Pipettes are thin glass tubes with a mainly cylindrical shape. They are available as volumetric pipettes or graduated pipettes. Hirschmann pipettes can be obtained in Class A, AS and B.??Volumetric pipettes A volumetric pipette has a marking for obtaining an exactly defined volume of liquid. Indication is realised with one or two volume marks. Volumetric pipettes are calibrated for EX / drainage.??Measuring pipettes Differing volumes of liquid are dispensed with measuring pipettes. They are therefore marked with a measurement scale. The zero point can be marked on the upper and lower end of the scale. Measuring pipettes are calibrated for EX / drainage.??Burettes A burette is a calibrated glass tube with a scale and a ground valve at the lower end;  the valve comes in different types and shapes. It is used in titration for quantitative measurement of small volumes of liquid. The scale consists of graduation marks or main point ring graduations and is frequently supplemented on the reverse side by a Schellbach stripe . Burettes are calibrated for EX.


II. Scaling

There are two types of graduation in the case of volumetric measuring devices with a scale (measuring pipettes, measuring cylinders, burettes):

  • Main point ring graduation
  • Graduation marks

Main point ring graduation Main point ring graduation is employed for Class A and AS measuring devices and uses the following graduation mark lengths:

Short graduation marks:

length between 10% and 20% of the tube circumference

Medium graduation marks:

length approx. 1.5 times as long as the short graduation marks

Long graduation marks:

at least 90% of the tube circumference

Graduation marks Graduation marks are employed for Class B measuring devices and have the following graduation mark lengths:

Short graduation marks:

length between 10% and 20% of the tube circumference

Medium graduation marks:

length approx. 1.5 times as long as the short graduation marks

Long graduation marks:

length at least twice as long as the short graduation marks

Schellbach stripe The Schellbach stripe is a coloured stripe applied to the reverse side of the measuring device in addition to the scale. When looking through the device, it forms an indicator with the meniscus on the upper edge of the liquid. This increases the accuracy of the reading.


III. Classification

Valid standards and the German Calibration Regulation (Eichordnung) classify glass volumetric measuring devices as follows:

  • Class A: the volume tolerances must lie within the error limits specified by DIN/ISO and EO. Class A products meet all the requirements for the conformity certificate.
  • Class AS: the volume tolerances must lie within the error limits specified by DIN/ISO and EO. The devices should be calibrated for EX and meet the requirements for rapid drainage and the prescribed waiting period. Class AS products meet all the requirements for conformity certificate.
  • Class B: the volume tolerances must lie within the double error limits of Class A/AS. However, Hirschmann Class B products do not exploit this latitude fully and usually lie well within 1 1/2 times the error limits.

 

IV. Standards

Glass measuring devices are certified pursuant to the following standards

Measuring flasks:

DIN EN ISO 1042

Measuring cylinders:

DIN EN ISO 4788

Burettes:

DIN EN ISO 385

Measuring pipettes:

DIN EN ISO 835

Volumetric pipettes:

DIN EN ISO 648

 

For more information about our breating protection please send your inquiry to:

justina.tay@fleischhacker.biz or chingyee.tan@fleischhacker.biz

Fleischhacker LLP

(Singapore Office)

1 Lorong 2 Toa Payoh

#04-03 Braddell House

Singapore 319637

www.fleischhacker-asia.biz