Product lines
> TD 1 C
>> Advantages

Easy determination of surface tension
the new LAUDA tensiometer TD 1 C

The TD 1 C model works with Du Noüy ring and Wilhelmy plate according to international standards (DIN 53914, ISO 304, ASTM D971). Furthermore, the density, according to the Archimedes’ principle, as well as smaller weights can be measured due to a newly-developed, even more powerful forcemeasuring cell with a considerably enlarged measuring range. The measuring table with the sample stage can be moved constant by means of ergonomic adjusting screws, like a microscope, in order to lower the Wilhelmy plate to the sample surface or in order to determine the force maximum during the ring measurement.

By means of the high-resolution display of the remote Command control, the increase in wetting force during withdrawing of the ring can be followed and the maximum force can also be found without detaching the lamella. The value displayed in the maximum is automatically corrected according to Zuidema and Waters, and thus corresponds to the surface tension of the measured liquid in mN/m. At the touch of a button, the measured value and all parameters can be either saved or directly printed out on an optional protocol printer.

Measuring features

– High resolution (± 0.1 mN/m, ± 1 mg) and enlarged measuring
   range up to 300 mN/m or 5 g
– Automatic maximum recognition
– Print-out of the measuring values (surface / interfacial tension,
   density) on an optional printer at the touch of a key
– Automatic correction of measuring values (according to
   Zuidema and Waters)
– Semi-automatic calibration at three levels of precision with
   calibration weights
– Input of sample dimensions possible
– Storage of up to 500 measurements and the accompanying
   parameters
– Numerical sample description determined by the user
   Displaying of different measuring
   values and modes