WB Johnson - DSM-501

WB Johnson DSM-501 Radiation Survey Meter with Integrated 1The DSM-501 Survey meter houses a 1" tissue equivalent scintillator inside the meter body. It's internal detector is excellent for low energy ranges and for detecting low levels of radioactive materials. The digital readout greatly simplifies interpretation of results.


Internal Plastic Tissue Equivalent Scintillator




Input Sensitivity 0.05V
Display-LCD 4-Digit x .75" LCD w/LED Backlight
LCD Refresh Rate 0.8 - 3.0 Sec in 0.2 Sec increments - adjustable
Display Backlight Push button, 30 Second auto off
Dose Ranges 1.0 uR/hr - 10 mR/hr or Sieverts
CPS/CPM Ranges 0-9999 cps, 0-999.9 kcpm
Electrical Non-Linearity +- 5% of full scale
Response Time Optimized for Each Range
Drift <5%
Count Times 10-2550 seconds in 10 second intervals
Environmental -20° F[-28° C]-140° F[60° C] | 5-95% RH
High Voltage Adjustable 300-1500 VDC|Regulation +-1%
Alarms 5-95% of Range
Battery 6 "AA" Alkaline-400 hours nominal
Probe Linearization Internal adjust for cal constant and dead time
Circuitry Digital Microprocessor Controlled w/Analog Readout
Dimensions 5.25" (14cm) H x 4" (10cm) W x 7" (18cm) L
Weight 2.5 lbs. (1.2 Kilos)
Construction Heavy Duty Cast Aluminum and Stainless Steel
Diagnostics Low Battery, Overrange - audible and visual
Probe Internal Tissue Equivalent plastic scintillator