K90100 Automatic Melting Point Range Apparatus


Test Method
The melting point of a crystalline solid is the temperature at which the solid to liquid phase transition occurs, referenced at one atmosphere (1 ATM) of pressure.

Features and Benefits
• Conforms to BP Appendix 5 - Method 6 and GLP specifications

• Readily interchanged between automatic and manual detection of melting point ranges

• Intelligent Lamp Intensity Control with Soft Start

• Storage capacity for up to 20 sample tests

• User-interactive software and data entry, including easy alphanumeric entry of sample name, ID number, and date

• User selectable operating modes: automatic and manual.


K90100 Automatic Melting Point Range Apparatus
The Koehler Automatic Melting Point Range Apparatus is the latest technology for microprocessor-based determinations of melting point ranges of crystalline, powdered and polymeric materials, and is used to assess sample purity. Requires approximately 5mg of sample spread uniformly on a glass slide, covered with a glass coverslip. The slide is placed on a uniformly heated, round furnace and subjected to a heating profile as required by the user. Two user operating modes are available: automatic and manual. In the automatic mode, the start and end of melting point range is automatically detected by a photosensing device. In the manual mode, the start and end of melting point range can be selected manually with a key-press by the user. Sample melting point can be determined as per the BP method by the ‘Heat & Cool’ temperature function. The melting process is recorded and viewed on-screen in real-time by a CCD camera. Precise temperature control gives reproducible results to within 1%. The unit contains an automatic temperature safety cut-off feature if no melting points are detected 15C above the expected melting point or if the oven reaches 315C. The melting process is magnified, recorded, and viewed on-screen in real-time by a CCD camera. The change in physical appearance of the sample with respect to temperature is recorded, and the start/end of melting is observed automatically. A representation of the entire process can be printed out in graphical form for validation.

Conforms to: BP Appendix 5-Method 6; GLP

Visual Image: 10x magnified displayed on monitor

Temperature Range: ambient + 5 to 315C

Heating Rates: 0.2, 0.5, 1.0, 2.0, 3.0, 6.0, 12.0C/min

Temperature Readability: 0.1C

Cooling Time: 20 minutes (300C to ambient)

Temperature Accuracy:
0.5C (ambient + 5 to 200C)
0.8C (200 to 315C)

Sample size: 5 mg (approx.)

Sample Holder: Glass Slide 1 0.02mm thick

Sample Cover: Glass Coverslip 0.17mm thick

Temperature Sensor: Pt-100 (2 wire RTD)

Test Storage: Up to 20 tests with parameters

Electrical Requirements
115V, 60Hz, Single Phase
220V, 50Hz, Single Phase

Dimensions lxwxh,in.(cm)
Main Unit: 16.5x12.25x13 (42x31x33)
Monitor: 8x5.5x5.5 (20x14x14)
Net Weight: Main Unit: 22 lbs (10 kg)
Monitor: 1.8 lbs (0.8 kg)

Shipping Information
Shipping Weight: 29 lbs (13 kg)
Dimensions: 3.6 Cu. ft.

Ordering Information



Product Description

Electrical Requirements


Automatic Melting Point Apparatus

115V 60Hz


Automatic Melting Point Apparatus

220V 50Hz




Product Description


Glass slides and cover slips
(pack of 100)