Model: 491-257
Indicating PyrometerProperties:
A pyrometer which utilizes the effect of temperature variation to change the characteristics of an electrical constant and this difference of electrical potential is shown by the position of a pointer relative to a graduated scale.
Part 491-257 NSN 6685-00-883-3731
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
Freight Classification
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Schedule B and Export
- Schedule B: 9025194000
- SITC: 87455
- End Use: Measuring, testing, control instruments
- NAICS: 334513
- USDA: 1
Freight Class: Pyrometers not combined with other instruments
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