辐射仪 型号:DSM-500库号：M244954 

Johnson Radiation Digital Survey Meter/Geiger (GM) Counter (DSM500 HP265)


This popular configuration includes the DSM-500 meter paired with the HP-265 probe. The DSM-500 is a microprocessor-controlled instrument representing the new gold standard of survey instruments. It is a digital instrument with an digital display that automatically chooses the correct range with no user intervention required. Comes standard with timed-count capability, alarm setpoints and probe-saturation and other error indicators. The HP-265 is the best all purpose detector available. It is a pancake G-M detector sensitive to most alpha, beta, & gamma Radiation.

Meter Specifications

Input Sensitivity 0.050v
External CPM/Dose Switch External Switch selects CPM mode or Dose Linearized mode
for the probe selected
Four Linear Ranges (other scales available) 0-0.2 | 0-2 | 0-20 | 0-200 mR/HR
0-500 | 0-5,000 | 0-50,000 | 0-500,000 CPM
Other Ranges Available
Calibration Controls Each probe & range has separate non-interacting controls
Diagnostics HV Out of Range, Battery Low, Probe Over-range
Range Adjustment Auto-ranging
Electrical Non-Linearity 
±5% of Full Scale
Response Time Optimized for Each Range
Drift <5%
Audio On-Off Front Panel Switch, water and solvent resistant
Environmental -20
⁰F (-28⁰C)-140⁰F (60⁰C) | 5-95% RH
High Voltage Adjustable 300-1500 VDC | Regulation 
±1%
Low Voltage +5 VDC & -5 VDC Regulation 
±0.5%
Battery 6 "AA" Alkaline--400 hours nominal
Meter 3.5" Scale | Ruggedized Meter Movement
Calibrated 0-500 | 0-0.2 | Linearity 
±3%
Circuitry Digital Microprocessor Controlled w/Analog Readout
Dimensions 5.25" (14cm) H X 4" (10cm) W X 7" (18cm) L
Weight 2.5lbs. (1.2 Kilos)
Probe Specifications




RANGE 0--200 mR/hr Dose (based on Cs 137 calibration) 
ENERGY RESPONSE Alpha--3.5 MeV min, Beta--100 keV min, Gamma--20 keV--2MeV 
OPERATING VOLTAGE 
900 vdc
WINDOW DENSITY 
1.6 mg/cm2
DEAD TIME 
20 μSec
SENSITIVITY TO Cs 137 
2,500 CPM/mR/hr
SENSITIVE AREA 
14 cm2
ENVIRONMENTAL 
-20°F (-28C)-140°F (60°C) 5-95%RH IPX4 Housing
DIMENSIONS 
2.74" (7cm) DIAMETER X 5.511" (28cm) LONG
WEIGHT 


1 POUND (.5 kilos)
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