Analog Micro-R Survey Meter

The GSM-501 outperforms its competitors with an impressive 1x1 tissue equivalent scintillator, providing a much better dose response than other Micro-R meters. This accuracy combined with a full Auto-Ranging display makes this the most accurate and easy to use Micro-R meter on the market.

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Product Specifications

Input Sensitivity0.050V
External CPM/Dose SwitchExternal Switch selects CPM mode or Dose Linearized mode
Ranges0-5| 0-50 | 0-500 | 0-5000 Micro R
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)
ProbesInternal 1" x 1" Plastic Scintillator Tissue Equivalent 0-10mR/hr
Probe Operating Voltage900 vdc
Probe Energy Response40 keV - 2 MeV Gamma Based on Cs-137=1(non-compressed)
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