Technical data
photoLab
®
7100 VIS
42
ba77095e03
10/2017
Usable cells
Round cells
– Outer diameter: 16 mm
– Inner diameter: 13.6 mm
– Flat cell bottom
Rectangular cells*
– Path length: 10 mm, 20 mm and 50 mm
– Maximum width: 12.6 mm
Minimum filling level
20 mm
Minimum filling volume
Round cell 16 mm: 4 ml
Rectangular cell, 10 mm: 2 ml
Rectangular cell, 20 mm: 4 ml
Rectangular cell, 50 mm: 10 ml
Cell recognition
Automatic for most types
*
Depending on the wavelength range, different kinds of cells are suitable. Apart from round
cells, all rectangular cell made of glass, quartz or plastic with opaque lateral surfaces are
suitable (see section 8.1). Cells with clear or serrated lateral surfaces are not reliably rec-
ognized by the automatic cell recognition.
Especially with plastic single-use cells we recommend you test them for suitability prior to
carrying out large-scale series of measurements.
For measurements in the UV range below 320 nm, glass cells and commercial PS plastic
cells are not suitable; below 280 nm, commercial PMMA plastic cells are not suitable due
to their transmission characteristics. Therefore, use quartz cells or tested single-use cells
(plastic) for applications in the UV range.
Measuring modes
Concentration
– Measurement with permanently programmed methods, adapted to the
WTW test set program
– Automatic method selection if test sets with barcodes are used
– Program support for the creation of additional user-defined methods
(max. 100)
– Citation forms and units method dependent
– Display of the absorbance value can be added
– Method data update possible via Internet
Absorbance / % Transmission
– Measurement against own reference absorbance value possible
Multi wavelengths
– Freely definable calculations from absorbance values at up to 10 differ-
ent wavelengths
– Calculations can be stored as methods (max. 499)
