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Want to ensure high-quality end products? Need to control the purity of raw materials? With METTLER TOLEDO's Dropping Point Systems the following physical properties of pitch, asphalt, polymers, resins, and many more samples can be measured accurately and automatically with just one click of the button:
Designed for simplicity, METTLER TOLEDO's Dropping Point Excellence is intuitive and easy to use. The color user interface provides clear information, with the possibility to display your SOPs on the instrument. Perform experiments from -20 °C to 400 °C. Store methods and results directly on the instrument. Customizable shortcuts on the homescreen offer a quick way to start each measurement.
Never miss a measurement again. Observe your experiment in real time via a video or replay it to verify your results. View results directly on the color touchscreen after the experiment. Performance and precision can be verified by calibration using certified reference substances.
In today's busy environment, every minute is precious. Speed up sample preparation by using our innovative tools: prevent contamination and prepare up to four samples at once. Save time by measuring two samples simultaneously and automatically, and export or print results directly after an experiment.
METTLER TOLEDO Dropping Point Excellence Systems conform to ASTM International standards and other norms. Furthermore, standard-compliant cups and measurement methods guarantee comparable results.
A digital melting dropping instrument uses a furnace and video camera to automatically detect the drop point and softening point event.
This measurement is done digitally, reducing operator influence considerably. Two samples can be measured simultaneously with a temperature accuracy of down to 0.2 °C and short heating and cooling times.
The layout of the furnace and the video image analysis respectively allow two samples to be measured simultaneously.
METTLER TOLEDO Excellence Dropping Point System DP70 and DP90 work both as an automated dropping point apparatus and as an automated softening point apparatus.
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A METTLER TOLEDO dropping point system is represented in the schematic diagram below.
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This system is a combination of a furnace and a video camera.
Dropping point and softening point is determined by heating the sample. The furnace is used to control the temperature during an analysis. Temperature control and temperature recording is guaranteed by a digital platinum temperature sensor.
In the Dropping Point Excellence instruments from METTLER TOLEDO, a white balanced LED light is shining on the test assembly, which consists of the cup and holder inside the furnace. The reflection image is recorded by a video camera.
For the automated dropping point determination, the entire drop point test is video-recorded and image analysis is used to detect the first drop that escapes the sample cup when it passes through a virtual white rectangle located underneath the cup orifice. While detecting this, the furnace temperature is measured and recorded at a resolution of 0.1 °C.
For the automated softening point determination, the leading edge of the softened sample is marked with a stepping line in the video. Once the stepping line has passed a virtual line that is located 19 mm below the cup orifice the corresponding furnace temperature is measured and recorded at a resolution of 0.1 °C.
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This is what is needed for fully automatic dropping point and softening point determination.
Dropping point testers are used to determine the dropping and softening points of ointments, synthetic and natural resins, rosins, edible fats, greases, waxes, fatty acid esters, pitch, asphalt, tars, bitumen, and many more materials.
Edible oils, fats and organic solvents can be solidified and measured at low temperatures. Substances often need to be cooled or frozen for a sufficient amount of time prior to the dropping point measurement. The METTLER TOLEDO Excellence Dropping Point System DP90 performs dropping point measurements down to -20 °C. Place the separate DP90 measurement cell, the furnace and the optical detection system, in a refrigerator or a freezer till the required temperature is attained.
The following workflow is recommended for dropping point measurements below ambient temperature. Note that "cooling device" (CD) refers to a freezer or refrigerator.
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The METTLER TOLEDO dropping point instruments fully comply with the following standards for dropping point and softening point determination:
The international standards ASTM D3104, ASTM D3461, ASTM D3954, ASTM D6090 and AOCS Cc 18-80 are specifically based on automatic dropping point and softening point determination on METTLER TOLEDO instruments.
