Overhauser Magnetometer GSM-19

Overhauser Magnetometer GSM-19 is a high-precision geophysical instrument used to measure the total intensity of the Earth’s magnetic field with high accuracy and long-term stability.
This instrument is widely applied in geological exploration, mineral surveys, archaeogeophysics, and subsurface structural mapping.

• Manufacturer / Type: GEM System / Overhauser Magnetometer GSM-19

• Sensitivity: 0.022 nT @ 1 Hz (0.015 nT PRO option)

• Resolution: 0.01 nT

• Absolute Accuracy: ±0.1 nT

• Measurement Range: 20,000 – 120,000 nT

• Gradient Tolerance: > 10,000 nT/m

• Sampling Intervals: 60+, 5, 3, 2, 1, 0.5, 0.2 seconds

• Operating Temperature: –40 °C to +50 °C

• Operating Modes: Manual, Base Station (1–60 s), Remote Control (optional via RS-232)

• I/O Interface: RS-232 (6-pin waterproof) and optional analog output, USB adapter available

• Storage Capacity: Mobile: 1.46M; Base Station: 5.37M; Gradiometer: 1.24M; Walking: 2.68M readings

• Dimensions: Console: 223 × 69 × 240 mm; Sensor: Cylinder ø 175 × 75 mm

• Weight: Console with belt: 2.1 kg; Sensor & staff: 1.0 kg