Thermostat metal sheets and strips are thin pieces of metal with unique qualities for thermostats. These sheets and strips help control the temperature by bending or moving when the temperature goes up or down. They can change shape with temperature shifts, helping control temperature in different devices and systems.

To ensure the product quality of these thermostat metal sheet and strip, the Bureau of Indian Standards (BIS) has made it mandatory for manufacturers to undergo BIS registration and obtain the BIS ISI mark before selling it in the market. Manufacturers can use the ISI Mark on their products only after obtaining a license from BIS that is granted after BIS registration. The presence of the ISI mark on a product indicates that it complies with BIS's stringent quality standards.

IS 5478:1969 covers the thermostat metal sheet and strip. This standard specifies the general requirements for thermostat metal in sheet and strip form. Thermostat metal is a composite material, usually in the form of a sheet or strip, made up of two or more materials of any appropriate nature, metallic, or otherwise, that tend to change curvature when the temperature is changed due to the differing coefficients of linear expansion of the components.

By including material constants such as chemical composition and physical properties, this standard can also be used as a guide in preparing detailed specifications for various specified types of thermostat metals.

REQUIREMENTS FOR IS 5478:1969 

1.     The physical properties of a specific type of thermostat metal, such as flexibility, hardness, and electrical resistivity, must conform to the specifications established by the supplier and must be as agreed upon between the purchaser and the supplier.

2.     The bond between the component materials must be strong and complete throughout the entire sheet or strip.

3.     The material's surface must be free of cracks, seams, laps, scratches, blisters, rust, and other defects that are detrimental to the material's performance.

4.     The supplier must provide a certificate stating that the material supplied meets the material specification requirements.

5.     The thermostat metal must be packaged to prevent damage during normal handling and transportation.

6.      The entire length and width of the thermostat metal must be marked in accordance with the supplier's own standards.

7.     The ISI mark must be applied to the product, provided that the product so marked meets all of the specification's requirements.

8.     The manufacturer must obtain a BIS license from the Bureau of Indian Standards to use a standard mark (ISI Mark).

TEST REQUIREMENTS OF IS 5478: 1969

·       Reverse bend test

·       Flexibility test

·       Hardness test

·       Resistance test

·       Dimension and tolerances

Process for BIS ISI Mark Certification

To know the process in detail, please visit:

• ISI Mark Certification for Domestic Manufactures
• ISI Mark Certification for Foreign Manufactures

Under BIS Registration Products ISI and CRS

• BIS CRS Registration For IT Products List
• ISI Mark Registration For ISI Products List

CONCLUSION

Thermostat metal sheet and strip has been included in the mandatory ISI Certification Scheme under the IS 5478:1969 standard. This product cannot be exported, imported, or sold in the Indian consumer market without the ISI Mark imprinted.

If you need any assistance with BIS ISI registration for thermostat metal sheet and strip or ISI mark certification for thermostat metal sheet and strip, you can reach out to Evtlindia. We provide assistance with all documentation formalities with India's BIS office, ensuring a smooth and hassle-free registration experience, guiding you through the entire process from start to finish.

You can contact us via email at contact@evtlindia.com or by phone at 9560935898. Feel free to get in touch with us anytime for the support you need.