vertical intensity variometer

vertical intensity variometer

[′vərd·ə·kəl in¦ten·səd·ē ‚ver·ē′äm·əd·ər]
(engineering)
A variometer employing a large permanent magnet and equipped with very fine steel knife-edges or pivots resting on agate planes or saddles and balanced so that its magnetic axis is horizontal. Also known as Z variometer.
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