Melting point meter for semi-automatic measurements
Semi-automatic measurement using 10x observation optics
The M3000 provides fast and easy examination of powdery substances with a melting point up to 360 °C. Due to the triple capillary intake, it is possible to analyse three samples within one measurement run. Thanks to the preheating rate and the integrated fan cooling, fast measurements are possible in any temperature range. The display provides a wellarranged readout of all important measuring data.
- Semi-automatic measurement
- 3 capillary intakes
- Monitoring of the illuminated sample via lens
- Fast cooling through integrated fan
- Digital display of all important data
- Display in German or English
- With RS-232 interface for printer CBM910
- Easy-to-clean membrane keypad
- Includes protective cover and 100 capillaries
- Small sample volume
The determination of the melting point is of great importance in the identity test, since many substances can be determined by their melting point.
The purity of substances can also be qualitatively measured via melting point. A well-defined melting point is only given for 100 percent pure substances. Due to impurities, such as impurities or dopants, most substances have a melting interval (beginning of the melt to completion of the melt) of a few degrees Celsius. Even impurities during the manufacture of chemicals cause this melting point to expand to a melting interval. As a result, most substances that are examined with a melting point meter have a melting interval. This effect is used to identify the degree of impurity of the substance.
|MEASURING RANGE||30–360 °C|
|ACCURACY||±0.3 °C (30–200 °C)
±0.5 °C (200–360 °C)
|PREHEATING RATE||To 300 °C approx. 4.0 min
To 360 °C approx. 7.5 min
|HEATING RATE||1 °C min-1|
|NO. OF CAPILLARIES||3|
|CAPILLARY Ø||1.4 mm|
|POWER SUPPLY||90–264 V|
|DIMENSIONS (W X H X D)||210 mm x 360 mm x 230 mm|
The advantages of automatic and semi-automatic measurement
The determination of melting point is a fundamental technique in sample analysis, yielding essential information on material composition and purity. It is also a technique which it is possible to complete, without specialist equipment.
Why then, should one invest in an automated melting point meter? While it is possible to manually heat a sample and observe it, perhaps through a microscope, to determine melting point, this is a cumbersome and unreliable approach. The modern melting point meter is faster and more accurate, providing reproducible results which do not rely on the skill of the individual operator and which can be printed for a permanent record. Digital control means that the sample is heated, the melting point recorded, and the apparatus cooled ready for the next sample is just a few minutes, without operator intervention. Sample sizes are small, being just enough powdered material to fill a small capillary tube, and the output reading is accurate to within 0.3 – 0.5C with good reproducibility.