GEM Systems – Sensitivity vs Speed Configurations

Selecting the Optimal Systems based on speed and sensitivity

The following table shows the Sampling Interval (in seconds), Mode (Slow, Walk, Fast and Super Fast) and Sensitivity (in nT). It also relates these values to specific Product Families:

GSM-19T (Proton Precession)
GSM-19, 19W (Overhauser)
GSM-35 (Potassium)
GSM-20GS (SuperGrad)

Sampling Interval (sec)	3	2	1	0.5	0.2	0.1	0.05
Mode	Slow	Slow / Walk	Slow / Walk	Walk	Fast	Super Fast	Super Fast
Sensitivity (nT/Hz1/2)
0.2		GSM-19TW	GSM-19TW		GSM-19
0.1	GSM-19T
0.05				GSM-19W
0.022			GSM-19W
0.015	GSM-19 Pro	GSM-19 Pro
0.005
0.002
0.0025				GSMP- 35	GSMP- 35/35A	GSMP- 35/35A	GSMP- 35/35A
0.0007			GSMP- 35		GSMP- 35	GSMP- 35	GSMP- 35
0.0002					GSMP- 20GS3	GSMP- 20GS3	GSMP- 20GS3
0.0001				GSMP-20GS
0.00005			GSMP-20GS
0.00002
0.000001

The Recommended Instrumentation table gives an overview of the magnetometer models that apply for Ground, Airborne and Stationary work and complements the Application Configurator.

The Application/Instrumentation Selection table provides an overall summary of the instrumentation that is available for the following applications.