Second-hand GSM-19 GW

Second-hand GSM-19 GW

Technical Specifications for the second-hand GSM-19 GW

  • Year : 2012
  • In very good shape
  • Sensitivity: Standard GSM 19   0.022 nT @ 1 Hz
  • Resolution:0.01 nT
  • Absolute Accuracy: +/- 0.1 nT
  • Range: 20,000 to 120,000 nT
  • Gradient Tolerance: up to 10,000 nT/m
  • Samples at: 60+, 5, 3, 2, 1, 0.5, 0.2 sec
  • Operating Temperature: -40°C to +50°C
  • Modes Manual: Coordinates, time, date and reading stored automatically at up to 0.2 sec.
  • Base Station: Time, date and reading stored at 1 to 60 second intervals.
  • Input / Output: Input/Output: RS-232 using 6pin weatherproof connector with USB adapter.
  • Manufacturer: GEM Systems


Second-hand GSM-19 GW

The GSM-19 is an instrument with excellent benefits for subsurface exploration. The Overhauser system offers an order-of-magnitude increase in sensitivity over GEM’s Proton system and matching sensitivities of some alkali devices. We recently decided to sell a second-hand GSM-19 GW to renew our park.

Overhauser magnetometers also provide high absolute accuracy, ruggedness, and reliability – as numerous systems are in operation around the world with an excellent performance record so that the GSM-19 can be counted on in any situation.

The GSM-19 is a standard in many fields, including: mineral exploration, environmental and engineering, pipeline mapping, airborne base station, Unexploded Ordnance Detection, archaeology, magnetic observatory measurements, volcanology and earthquake prediction.

“Overhauser” Effect

The Overhauser effect occurs when a special liquid (with unpaired electrons) is combined with hydrogen atoms and then exposed to secondary polarization from a radio frequency (RF) magnetic field. The unpaired electrons transfer their stronger polarization to hydrogen atoms, thereby generating a strong precession signal that is ideal for very high sensitivity total field measurements.

GEM’s Overhauser magnetometer/gradiometer also offers much less power consumption than Proton or Alkali Vapour systems so you can perform a whole day’s work on a single charge.

The Overhauser Magnetometer does not require maintenance: it is a robust and effective instrument. It also has environmental specifications, which include an operating temperature of -40°C to +50°C; giving unparalleled performance throughout all survey conditions.

The cables and connectors offer maximum durability and performance. The light weight backpack gives hands-free operation while ensuring a stable, comfortable, and lightweight platform for making measurements.

GPS and Navigation

Along a basic GPS tracking, GEM provides a Navigation feature with real-time coordinate transformation to UTM and local grid. A survey “lane” guidance system with cross track display coupled with automatic end-of-line flag and guidance to the next line allows the operator to navigate seamlessly while carrying out the magnetic survey. Operators can define a complete survey on PC and download points to the magnetometer via RS-232 before leaving for the field.

Second-hand GSM-19 GW

We propose second-hand GSM-19 GW sold with a GPS integrated. This equipment was made in 2012 and is in very good shape. Please do not hesitate to contact us for any further information you may require.


Second-hand GSM-19 GW