Auto-Ranging Survey Meter

This microprocessor-controlled instrument represents the gold standard of survey instruments. The GSM-500 is a digital ciruitry instrument with an analog display that automatically chooses the correct range with no user intervention required. Comes standard with probe saturation and other error indicators.

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Product Specifications

Input Sensitivity0.050V
External CPM/Dose SwitchExternal Switch selects CPM mode or Dose Linearized mode
Four Linear Ranges0-0.2, 0-2,0-20,0-200 mR/hr
0-500,0-5,000, 0-50,000, 0-500,000 CPM
Ranges will depend on selected probes
Calibration ControlsEach mode & range has separate non-interacting controls
DiagnosticsHV Out of Range, Battery Low, Probe Over Range
Range AdjustmentAuto-Ranging
Electrical Non-Linearity+- 5% of Full Scale
Response TimeOptimized for Each Range
AudioOn-Off Front Panel Switch, water and solvent resistant
Environmental-20° F[-28° C]-140° F[60° C] | 5-95% RH IPX4 Housing
High VoltageAdjustable 300-1500 VDC|Regulation +-1%
Low Voltage+5 VDC & -5 VDC Regulation +-0.5%
Battery6 "AA" Alkaline-400 hours nominal
Meter3.5" Scale | Ruggedized Meter Movement
Calibrated 0-500 | 0-0.2 | Linearity +-3%
CircuitryDigital Microprocessor Controlled w/Analog Readout
Dimensions5.25" (14cm) H x 4" (10cm) W x 7" (18cm) L
Weight2.5 lbs. (1.2 Kilos)
ProbesSupports all Johnson Probes
Probe Energy ResponseDepends on Selected Probes
Questions? Call today!
(208) 557-6945

Mailing Address
W. B. Johnson Instruments
3998 Commerce Cir.
Idaho Falls, Idaho 83401

Shipping Address
W. B. Johnson Instruments
3998 Commerce Cir.
Idaho Falls, Idaho 83401