DSM-500 Digital Radiation Survey MeterDSM-500 Survey Meter by WB Johnson

Compatible with external probes: G-M, NaI Scintillation, Plastic Scintillation, and Alpha Scintillation Detectors

(Click on to "We Are Here" icon for online chat)

The DSM-500 microprocessor-controlled survey meter represents is our newest line of digital survey meters. The DSM-500 includes a large, backlit digital LCD that automatically displays the correct reading with no user intervention required (auto-ranging). The DSM-500 can be configured to indicate, CPM, CPS, R/hr and/or Sv/hr. Units can be easily changed with an internal switch; no recalibration is required. The survey meter includes probe-saturation and other error indicators. A scaler function, adjustable alarms an external data port are also included. This survey meter supports most external probes. For a choice of probes with photos and specifications, scroll down for a list of probes. If you require a dual probe survey meter, we recommend the DSM-525.

DSM-500 Digital Survey Meter.......................(Order Online) US Orders ONLY

DSM-500 Survey Meter Manual

Dose/Counts Switch Change Dose Rate to Count Rate by Toggling an External Switch
Display LCD 4-Digit x .75" LCD w/LED Backlight
External Probe Input All Johnson Probes
Dose Range Probe Dependent
Energy Range Probe Dependent
CPM Range 0-999.9 Kcpm or Kcps
Probe Linearization Internal adjust for calibration constant and dead time
Scaler Ranges 0-999.9 Kcounts
Scaler Count Time Ranges 10-2550 Seconds (10 second increments)
Alarms 5-95% of Range
Diagnostics Low Battery, Over-range - 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 400-1250 VDC | Regulation +-1%
Battery 6 - "AA" Alkaline (nominal 200hrs Operation)
Dimensions 6.25" (16cm) H x 4" (10cm) W x 7" (18cm) L
Weight 2.5 lbs. (1.2 Kilos)


PPancake GM probe, HP-265 by Johnson Nuclearrobes /Detectors Available, Choose one per monitor.

General Purpose Survey

HP-265 G-M Pancake Probe

Sodium Iodide Scintillation Detectors for Gamma - MircoR

GLE-1 Probe for Low Energy Gamma
 Johnson Nuclear MRSP-1 plastic Scintillation detectorGSP-1 NaI Scintillation, 1 inch x 1 inch
GSP-2 NaI Scintillation probe, 2 inch x 2 inch

Gamma Plastic Scintillation - MicroR

MSRP-1 Plastic Scintillation Probe measures in the microR range
MSRP-2 Plastic Scintillation Probe measures in the microR range

Model  GP-1010 probeG-M Probes

GP-1010 Beta-Gamma G-M Probe with rotating beta window
GP-200 End-Window G-M Probe
GP-1001 Energy Compensated Cylinder G-M probe (0-200 mR/hr)
GP-1002 Energy Compensated Cylinder G-M (0-2,000 mR/hr)
GP-1003 Energy Compensated Cylinder G-M probe (0-10,000 mR/hr)

Alpha Scintillation Probes

Model ASP-2A 2" x Alpha Scintillation Detector



Nuclear Instrumentation

Dosimetry Shielding Sources Specials

Hepa Vacuums

NIST Calibrations

Marinelli Beakers

Fume Hoods


Emergency Response

Nuclear Medicine

Radiation Therapy Search Home

WB Johnson,   SE International,   Spectech,   Tech Associates,  Automess,  Ermes,   Lap Laser

...and more

Direct Scientific  /  tel (310) 589 0601 /   Email

contact us: en español, auf Deutsch
Open 8:00 AM - 5:00 PM Pacific Standard Time
Follow us on twitter and youtube.
visit our youtube channel
follow us on twitter
Check out our instrument demos.