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LAUDA TD Tensiometers

Tensiometer for measuring surface and interfacial tension

LAUDA TD

The LAUDA TD tensiometers perform measurements with the Du Noüy ring and Wilhelmy plate according to international standards. Thanks to the powerful load cell with significantly advanced measuring range, it is also possible to determine the densities according to the Archimedes’ principle as well as to measure small weights. The measuring table with sample plate can be moved smoothly without any jerking motions in order to, for example, place the Wilhelmy plate on the sample surface or find the maximum force during ring measurement.

The tensiometers come in a new design and are equipped with some unique technical features. As such, the world‘s smallest thermostat, the LAUDA PTT Peltier thermostating unit can be easily incorporated into the device. Surface and interfacial tensions can be easily measured, precisely and repeatably calculated, displayed, printed, saved and transferred to the computer with a single keystroke.

Application examples

  • Determining the aging of insulating oils via interfacial tension
  • Inspection of cleaning water by determining the surface tension
  • Characterization of surfactants for detergents and cosmetics


LAUDA Measuring Instruments brochureDownload a PDF
of our Measuring Instruments brochure:

LAUDA Measuring Instruments Brochure (8.2 MB)

  The TD advantages Your benefits
  • The Command remote control
  • Disruption-free operation during the measurement
  • Everything at a glance
  • Data storage included
  • Intuitive user operation
  • Measurement at the touch of a button
  • Automatic maximum detection
  • Accurate recording of measurements
  • No manual scanning necessary
  • Repeat measurements
  • Automatic measurement value correction according to Zuidema and Waters
  • No subsequent corrections necessary
  • Researching in tables not necessary
  • Display of the actual measured value in mN/m
  • Granite base plate on the TD 3
  • Level and adjustable feet
  • Measured value stability through shock absorption
  • High stability
  • Exact horizontal alignment
  • Integrable PTT Peltier thermostating unit with stirrer function
  • External Pt100 probe
  • Adjustable magnetic stirrer integrated
  • Space-saving and very fast thermostating of the sample in the measuring instrument
  • Temperature regulation in the sample liquid
  • Display of the actual sample temperature
  • Fast homogenization

TD 1 C Ring/Plate tensiometer

In the large work area which can be accessed from all sides of the instrument, various conventional sample beakers with diameters up to 8 cm can be used. The thermostating of the sample can, for example, be done using the LAUDA PTT Peltier thermostating unit. On the high-resolution display of the Command remote control, the wetting force increase when removing the ring can be traced and the maximum force set without breaking the lamella. The value shown as the maximum is automatically corrected according to Zuidema and Waters and thus corresponds to the surface tension of the measured liquids in mN/m. At the touch of a button, the measured value, together with all the parameters, can be temporarily saved or exported directly to an optional logging printer

Ring/Plate tensiometer TD 1 C with Command control

Included accessories:
Measuring ring according to Du Noüy (2-legged) · calibration weight 500 mg · plunger (glass) · tweezers · set of sample beakers (10 units) · plastic case · Command remote control · Power adapter

Additional accessories:
PTT (Peltier thermostating unit with stirrer function) · measuring ring according to Du Noüy (4-legged) · measuring plate according to Wilhelmy · calibration weight with DKD certificate 500 mg · matrix printer

Special features:

  • Advanced measurement area up to 300 mN/m or 5 g
  • Automatic maximum detection
  • Output of the measured values to optional printer at the touch of a button
  • Automatic measurement value corrections according to Zuidema and Waters
  • Semi-automatic calibration in three accuracy levels with calibration weights
  • Input of ring/plate dimensions possible
  • Storage of up to 500 measurement results with parameters
  • Numeric, user-defined sample designation

TD 3 Ring/Plate tensiometer

With the LAUDA TD 3, the measurement samples in the range from 5 to 80 °C can be thermostated extremely quickly and conveniently with the smallest of space requirements. The tensiometer serves to determine the surface/interfacial properties of organic and inorganic liquids (liquid/liquid or liquid/gas), dispersions, and emulsions (among others, for developing surface active substances like surfactants and emulsifiers) as well as for confirming their presence in waste water and other water samples. The integrated micro-controller takes care of the table positioning, maximum recognition and measurement data correction for the user. The program repeats measurements until such a time as the measurement value stability as set by the user has been reached and then calculates the static surface or interfacial tension. The measurements can be executed completely independently of the user and are more precise than the most important standards demand. As such, the equipment satisfies all of the requirements of the stringent GLP guidelines. In addition, both liquid density and low weights can be easily determined.

Ring/Plate tensiometer TD 3 with Command remote control

Included accessories:
Measuring ring according to Du Noüy (2-legged) · calibration weight 500 mg · plunger (glass) · tweezers · set of sample beakers (10 units) · plastic case · Command remote control · power adapter

Additional accessories:
PTT (Peltier thermostating unit with stirrer function) · measuring ring according to Du Noüy (4-legged) · measuring plate according to Wilhelmy · calibration weight with DKD certificate 500 mg · matrix printer · data transfer software for PC

Special features

  • Automatic maximum detection and maximum scanning
  • Output of the measured values to optional printer or data transfer to PC via RS 232C
  • Automatic measurement value corrections according to Zuidema and Waters
  • Statistical check of the measurement value stability
  • Storage of up to 500 measurement results with parameters
  • Numeric, user-defined sample designation
  • Granite base plate for vibration absorption and increasing stability
  • Background lighting of the measuring chamber
  • Waiting period prior to start of measurement can be programmed (ASTM D971)

 

Select up to 3 products to compare: Compare Products

TD 1 C Ring/Plate tensiometer

Technical features TD 1 C
Select to compare:  
Mode: Surface/Interfacial tension mN/m Measurement range: 0...300 (ring method); Resolution ±0.1
Mode: Density measurement g/l Measurement range: 0...2,000; Resolution: ±1
Mode: Weight measurement mg Measurement range: 0...5,000; Resolution: ±1
Sample designation Numeric (0...999)
Measurement value storage Results Max. 500, with date and time
Table movement manual Using rotary knob
Maximum detection Automatic
Ring correction Automatic according to Zuidema and Waters
Control and evaluation Command unit (control, display, documented data storage); printer (optional)
Ambient temperature range °C 10...40
Power consumption W 10
Dimensions (WxDxH) mm3 250x120x300
Weight kg ca. 5.0
Cat. No. 100…240 V; 50/60 Hz LMT 847
 

Summary

TD 3 Ring/Plate tensiometer

Technical features TD 3
Select to compare:  
Mode: Interfacial tension mN/m Measurement range: 0...300 (ring method); 0...999 (plate method); Resolution: 0.01
Mode: Density determining kg/m3 Measurement range: 0...2,000; Resolution: ±1
Mode: Weight determining mg Measurement range: 0...5,000; Resolution: ±0.1
Temperature range (PTT) °C 5…80 (±0.1)
Magnetic stirrer Integrated into PTT, adjustable (10 levels)
Table movement mm/s 0.1…1 (10 levels)
Maximum detection Automatic
Ring correction Automatic according to Zuidema and Waters
Interface RS 232, Command remote control
Control and evaluation Command unit (control, display, documented data storage) PC data transfer (optional); printer (optional)
Ambient temperature range °C 10…40
Power consumption W 10
Dimensions (WxDxH) mm 245x205x335
Weight kg 9.5
Cat. No. 90…240 V 50/60 Hz LMT 850
 

Summary

Command remote control

Command remote contol

The practical LAUDA Command remote control has a large display and can be operated without any lengthy instruction. It enables the remote operation of the TD 1 C and TD 3, e.g. outside of an fume hood and prevents disruptive repercussions on the measuring unit during input.

Easy selection of the measuring method
Direct selection of the method (density, plate, ring, and weight measurement) with just a few keystrokes. Positioning of the sample table via keystroke (with TD 3). Display of measuring status.

Clear input of measuring parameters
Easy input of all of the necessary measuring parameters, clearly laid out on a single page. Dimensions of the measuring elements, the ring and the plate, can be corrected and adjusted.

Automatic real-time logging
Running measurements can be compared in real-time with already saved measurement series. Transfer to PC possible. Logging of the individual measuring times, the maximum forces, corrected measuring values in mN/m, and the standard deviation (with TD 3).

TD accessories

Thermostating and stirring block
With the PTT the sample can be brought to the precise required sample temperature in an easy and very quick way. The adjustable, integrated stirrer helps when it comes to quickly establishing constant temperatures and homogenization process.

Cat. No. Description
LMTZ 831 PTT Peltier thermostating unit with integrated magnetic stirrer
HF 513 Holding plate for mounting to the TD 1 C
EZ 265 PTFE Stirrer (included in LMTZ 831)
HGH 188 Transparent plastic cover with opening (included in LMTZ 831)
UD 711 Pt100 temperature probe (included in LMTZ 831)

Measuring rings and measuring plate

Cat. No. Description
EZ 141 Measuring ring according to Du Noüy, 2-legged
(included in LMT 847 and LMT 850)
EZ 250 Measuring ring according to Du Noüy, 4-legged
EZ 251 Measuring plate according to Wilhelmy

Calibration weights

Cat. No. Description
EZ 033-1 Calibration weight, 500 mg (included in LMT 847 and LMT 850)
EZ 033-2 Calibration weight with DKD certificate, 500 mg

Vessels

Cat. No. Description Suitable for
EG 004 10 Beakers for density measurements TD 1 C , TD 3
EG 010 10 Sample beakers, 8 cm ø, not temperature-adjustable TD 1 C
EG 011 10 Sample beakers, 6 cm ø
(included in LMT 847 and LMT 850)
TD 1 C , TD 3
EG 009 10 Sample beakers, 5 cm ø TD 1 C
EG 047-1 Double-walled glass thermostating vessel,
height 30 mm
TD 1 C
EG 047-2 Glass cover for thermostating vessels TD 1 C

Burner
For cleaning ring/plate

Cat. No. Description
EZ 286 Gas burner
EZ 045 Spirit burner

Additional accessories

Cat. No. Description
UD 320 Glass plunger (included in LMT 847 and LMT 850)
UD 578 Digital temperature probe for TD 3
LDTM 2017 Software for data transfer between PC and TD 3
EKS 037 RS 232 connection cable for TD 3
EZ 034 Tweezers (included in LMT 847 and LMT 850)
EZ 158 Plastic case (included in LMT 847 and LMT 850)

Printer
For logging data

Cat. No. Description
LMC 819 Matrix printer
EAZ 034 Print ribbon
EAZ 035 10 Paper rolls