11. High-precision sextants have an invar ( a special low-expansion steel ) frame and arc. 12. Invar and Elinvar are able to resist magnetic fields, allowing the watch to continue to keep accurate time.13. In those used in IMAX projectors, the electrode bodies are made from solid Invar and tipped with thoriated tungsten. 14. A seismograph is also sensitive to changes in temperature so many instruments are constructed from low expansion materials such as nonmagnetic invar . 15. The Type 99 can fire tandem shaped charged ATGMs similar to the Russian Invar with a range of up to 5 kilometres. 16. For use as the compensation balance he developed a slight variation of the invar alloy which had a negative quadratic coefficient of expansion. 17. The bimetallic temperature-compensated balance wheel was made obsolete by the discovery of low-thermal-coefficient alloys invar and elinvar. 18. Scale materials include chrome on glass, metal ( stainless steel, gold plated steel, Invar ), ceramics ( Zerodur ) and plastics. 19. Where can I find data on the thermal conductivity of Invar over a range of temperatures, say from 300 K to the melting point? 20. A solid Invar balance with a spring of Elinvar was largely unaffected by temperature, so it replaced the difficult-to-adjust bimetallic balance.
