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New Cu-CuSO4 based LEMI non-polarized electrode for the measurement of electric field components at magnetotelluric (MT) sounding of Earth’s crust is developed (Fig.1).
Recently, the new law is adopted in
Our long-term study shows that the new LEMI
geophysical electrodes besides their ecological safety, also have some
advantages in comparison with Pb-PbCl ones. LEMI-701 electrodes are
produced as matched pairs selected by special training and developed
selection procedure. As an example, their long-term drift for ~ 4 months
(Fig.2) was about 50 microvolt versus 1 mV/month for Pb-PbCl. The
measured own noise of randomly selected matched pair of LEMI-701
non-polarized electrodes was ~10nV (Fig.3) at 1
Hz versus 0.4 mcV for Pb-PbCl. |
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Fig.1. LEMI-701 non-polarized electrode |
Fig.2. Drift of selected electrode pairs (long term) |
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Fig.3. Electrode spectral noise density |
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Weight: 0.8 kg
Dimensions: Ø 72 mm x 130 mm
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