Pensky-Martens Closed-Cup Flash Testers are used to determine the flash point of fuels, lubricating oils, liquids containing suspended solids, and liquids that tend to form a surface film during testing. Testers include a thermometer holder, brass test cup with handle, pilot flame, test flame reference bead, built-in stirrer, plated brass thermometer ferrule, and cooling vents.

Pensky-Martens Closed-Cup Flash Testers feature a cover that slides shutter open to apply test flame.