Ground System Tester

Model GST-400

The GST-400 permits  fast, simple, safe tests of work surface or operator resistance to ground.  The operator simply presses on the lid, or depresses the  push-button on the lid for a quick, easy, reliable test.

Tests and monitors work mats, laminates, and floor mats with resistances up to 10^8 ohms to ground.


The GST-400 has a user selectable upper limit of 10 Meg ohms or 100 Meg ohms.

Lower limit of 750K ohms.

Visual and Audible Alarms

3 year battery life @ 10 tests per day

NIST Calibration w/certification available

Supplied with 8' grounding wire, 8' work surface wire, instructions, and 9V battery(installed in unit).

Custom Limits

At customer request, we can supply this monitor with custom upper and lower limits.

Please contact us for details.

Operating Manual and Specifcations