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加拿大Gem Systems
加拿大Gem Systems inc公司是專門研發(fā)和生產(chǎn)磁力儀的專業(yè)公司，成立于1980年。其生產(chǎn)的GSM-19T質(zhì)子磁力儀是世界公認(rèn)的磁力儀的標(biāo)準(zhǔn)系列。
質(zhì)子旋進(jìn)磁力儀長(zhǎng)期以來(lái)一直是使用普遍、價(jià)格便宜的磁力儀，其用途包括礦產(chǎn)資源勘探，環(huán)境和工程勘探以及監(jiān)測(cè)磁場(chǎng)變化等.

About GEM

Advanced Magnetometers since 1980GEM has had a long and growth-oriented history - starting as Geophysical Electromagnetic Systems, a consulting partnership. The company incorporated in 1980 as GEM Systems, Inc. and is now known in industry as GEM Advanced Magnetometers.
Formed by Drs. Ivan Hrvoic and Jasna Hrvoic, the company continues to be managed by Dr. Hrvoic - who contributes many years of expertise in geophysical instrumentation and electronic design.

In the late 60's and early 70's, Dr. Hrvoic worked as Senior Research Engineer by Scintrex Ltd. During this time, initial research was conducted into the feasibility and design of a Continuous Reading High Sensitivity Airborne Overhauser Magnetometer.
This work was completed by GEM in 1983 through a research grant, and led to the first of an innovative series of magnetometer / gradiometer technologies.