Methyl Violet Test Apparatus

The instrument for determination of thermal stability according to the Methyl Violet test is designed for evaluation of thermal stability of nitrocellulose, nitroglycerine, and nitroglycol. However, it may be used for testing of high explosive stability as well. This test uses the fact that nitrate esters decompose to produce NO2 in order to determine the stability of measured substances. The stability is determined by means of the change of colour of indicator paper. The result of this test is period of time from inserting sample to preheated heating block to change of colour of indicator paper.

Methyl violet test is one of several methods for determination of thermal stability of propellants based on change of colour of indicator papers beside Abel test, Heat test or Vieille test. Mentioned tests work on a similar principle, but differ from each other in terms of the temperature of measurement, weight of sample, size and shape of heating tube, or kind of used indicator paper. Above mentioned tests cannot be used to compare different types of explosives.

The instrument consists of a heating block made of Special Type Metal with 26 internal holes for glass tubes. The glass tubes with the tested samples are inserted to the holes in a heating block. The tubes are covered by a lid with hook. On the hook inside the test tube is hung indicator paper. The quality of indicator papers is guaranteed to meet Naval Powder and are currently used and accredited by the US Military. The temperature of the block is controlled by a digital temperature controller. The controller unit contains an independent alarm circuit off the heating if the temperature accidentally increases above a specified safety limit (controlled by and the limit controller). Temperature in the heating blocks is controlled and corrected using calibrated mercury thermometers or calibrated digital thermometer.

We are ISO and CE certified Methyl Violet Test Apparatus manufacturers and suppliers in India. Each unit is made with rugged construction and equipped with easy to use controller system and safety devices.

If you want to buy any standard or customized model or know Methyl Violet Test Apparatus price, please email us your query. Our factory is located in Mumbai and we supply Navi Mumbai, Thane, Palghar, Nagpur, Karnataka, Bengaluru, Goa and throughout India.