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Knowledge base

Geotech develops & manufactures full-series geophysical exploration instruments for mineral, environmental and engineering geological survey industries.

Resistivity Meter Price: 2026 Buyer’s Guide

TIPS:Resistivity meter prices range from $150 for basic DIY kits to over $60,000 for industry-leading multi-channel systems. The cost of a resistivity meter depends on channel count, maximum depth, IP capability, and software integration. Entry-level single-channel units typically cost $2,000–$5,000.…

Geotech develops & manufactures full-series geophysical exploration instruments for mineral, environmental and engineering geological survey industries.

Electrical Resistivity Tomography: A Complete Technical Guide

TIPS:Electrical Resistivity Tomography (ERT) is a non-invasive geophysical technique that maps subsurface resistivity by injecting direct current through electrode arrays. This technical guide explains how an ERT System works—from Ohm’s Law fundamentals and electrode configurations to 2D/3D data inversion—helping geophysicists…

Geotech develops & manufactures full-series geophysical exploration instruments for mineral, environmental and engineering geological survey industries.

ERT vs TEM: Which Geophysical Method Fits Your Project?

TIPS:Cross-hole Electrical Resistivity Tomography (ERT) and Transient Electromagnetic Method (TEM) are two complementary geophysical techniques for hydrogeological surveys. This technical guide compares how ERT System delivers high-resolution near-surface imaging while TEM achieves deep penetration for groundwater detection. Learn which method…

Knowledge base cover for Geotech proton magnetometer, showing instrument set housed inside shockproof transport case with mountain geological scenery as background

Proton Precession Magnetometer: Single or Dual Sensor?

TIPS:Proton Precession Magnetometer systems deliver ±0.1nT precision for geophysical surveys. This guide compares High-Sensitivity Magnetometer single and dual sensor configurations for mineral exploration. Learn how Proton Precession Magnetometer technology with OCXO stabilization enables 0.05nT anomaly detection, and why High-Sensitivity Magnetometer…