WB Johnson - DSM-500

WB Johnson DSM-500 Mutipurpose radiation survey meter


The DSM-500 Survey meter is an excellent multi purpose unit as it works with many WB Johnson probes. It's digital auto-rainging readout allows for easy interpretation of measurements, and a highly configurable intrument. These meters can be customized to specific applications, be it contamination monitoring, dose rate, or NORM measurements.




Full Probe Selection



Dose/CPM Switch External Dose/CPM Switch
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
Dose Ranges 0.0µR/hr-9999 R/hr
CPM Ranges 0-999.9 Kcpm
Probe Linearization Internal adjust for cal constand and dead time
Scaler Ranges 0-999.9 Kcpm
Scaler Count Time Ranges 10-2550 Seconds (10 second increments)
Alarms (optional) 5-95% of Range
Diagnostics Low Battery, Overrange - Audible & Visual Alarms
Range Adjustment Auto-Ranging All Scales
Electrical Non-Linearity < 5% Full Scale
Response Time Fast - 10-2550 Seconds (adjustable) | Slow 10-250 seconds (adjustable)
Drift < 5%
Environmental -20°F[-28°C] to 140°F[60°C]| 5-95% RH IPX4 Housing
High Voltage Adjustable 300-1500 VDC | Regulation +-1%
Battery 6 - "AA" Alkaline (nominal 100hrs Operation)
Circuitry Digital Microprocessor Controlled
Dimentions 5.25"(14cm) H X 4" (10cm) W x 7"(18cm) L
Weight 2.5 lbs. (1.2 Kilos)
Construction Rugged, Heavy Duty Cast Aluminum & Stainless Steel
Probes Supports All Johnson Probes
Data Output 9 Pin Serial RS-232 - Panel switch manual data extraction