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Home / Applications / Petroleum Products and Biofuels / Flash Point / Automatic Flash Point by Pensky-Martens Closed Cup

Automatic Flash Point by Pensky-Martens Closed Cup

Automatic Flash Point by Pensky-Martens Closed Cup


Koehler Instrument Company

Summary of Method


On this method a sample is heated at a constant rate and a test flame is applied at regular intervals. Liquid part and vapors of sample are stirred at speed required by method. Flash Point is the lowest temperature, corrected by barometric pressure, at which application of ignition source causes vapors of sample to ignite.

This method is intended for flash point determinations of fuels, lubricating oils, liquids containing suspended solids and liquids that tend to form a surface film during testing.



The automated Pensky-Martens flash point tester accurately determines the lowest flash point temperature of fuels, lubricating oils, and homogenous liquids and liquids that tendo to form a surface film during testing (ASTM D93 B). Flash point tests are simply conducted by mounting the flash cup filled with sample into the test position and selecting a pre- or user-programmed test method.

A quick search method allows for determination of flash points for unknown samples and a method for asphalts is also included. The automation routines provide accurate test results, even with users inexperienced in flash point test methods.

The flash point test result is automatically corrected to standard pressure (101.3 kPa). The unit is equipped with a differential Pt-100 RTD probe designed to duplicate the response time of a mercury-in-glass thermometer as per ASTM D93-02a and E1-03a. The system features multiple sensors for continually monitoring of instrument function and displaying an error message if a problem is detected. The performance of the electrical ignitor is continuously checked, and the user is notified upon the need of replacement due to either damage or the end of its useful life.

The system is easily interfaced with an external PC for operation and method updates. When performing a test, the system will display the stirring speed, temperature curve (also printed out), and current test status. The system alerts the user if the first application of the ignitor results in a flash or if no flash point is detected at the end of the test program. If a flash is not detected 30°C above the expected flash point or at 400°C, then the test is automatically aborted for safety. An easy connection to the air ventilation system or external water connection provides a quick cool down between test runs for operational efficiency. 


For more information regarding features, part numbers, quotations and related matters, please send us an e-mail to:

For more information regarding use of this instrument, applications, instruction manuals and maintenance requests, please send us an e-mail to:



JIS-K2265, DIN-EN 22719, IP-34, ISO-2719, NF M-07-019.