BS 1041-7:1988

What is BS 1041-7- Temperature/time indicators about? 

BS 1041-7 is the seventh part of an International Standard that discusses the methods and meters for temperature measurement. 

BS 1041-7 provides guidance on “change of state” devices which are used to indicate the amount of heat work that the subject being considered has undergone.  

BS 1041-7 includes two groups of change in state devices that change shape or size and those which change colour. It includes in the former are the following: 

• Pyrometric cones 
• Thermoscope bars 
• Bullers rings 

Of the preceding, pyrometric cones and thermoscope change their shape during heating, and Buller rings change size. The change of colour devices are as follows: 

• Temperature indicating paints 
• Reversible colour change indicators and paints 
• Temperature indicating labels 

Who is BS 1041-7- Temperature/time indicators for?  

BS 1041-7 on temperature/time indicators is relevant to: 

• Manufacturers and designers of temperature/time indicators 
• Ceramic industry 
• Thermal engineers 
• Laboratories 
• Regulatory authorities 
• Testing authorities  

Why should you use BS 1041-7- Temperature/time indicators? 

A temperature/time indicator is a device or smart label that shows the accumulated-time history of a product. The temperature/time indicators that depend on the change of shape or size are used in the firing of ceramic wares such as grinding wheels, bricks, refractories, electrical porcelain, china, earthenware, and sanitary ware, or tiles.  

BS 1041-7 specifies various temperature/ time indicators that measure the temperatures of the accumulated time history, which is very helpful for the users as it indicates the effect of temperature and time.  

BS 1041-7 describes the pyrometric cone which is a slender truncated trihedral pyramid of pressed ceramic material that deforms under a particular temperature/time treatment. It also talks about the Bullers ring which is an annular ring of pressed ceramic powder that contracts with heat work. 

Thermoscope bars in accordance with BS 1041-7 contain a range of frits, clays, feldspars, silica, and other minerals, like those used in pyrometric cones. 

Thus, BS 1041-7 assists with the temperature indicating labels and their characteristics. BS 1041-7 guides the distinct types of test methods and procedures and also guides them for temperature indicating paints. 

Overall, BS 1041-7 is useful as it guides in the selection and describes the uses of temperature/time indicators that can be beneficial for your business and can also help you to expand your business globally.