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DSM-500 W/ MRSP-1 PROBE

Low Dose Measurements

The DSM-500 combined with the MRSP-1 PROBE allows the user to make near tissue equivalent low dose measurements. The rate meter boasts an oversized digital display with unique counts to dose capability allowing the user to quickly change between counts and dose rate and back to counts by simply flipping a toggle switch. Other features include a scaler for counts per unit of time, display error indications and audible/visual ALARMS.

FEATURES

  • EXCELLENT LOW-LEVEL GAMMA DETECTION
  • MRSP-1 NEAR TISSUE EQUIVALENT PROBE
  • 1 µR/hr – 10 mR/hr DOSE RANGE
  • AUTO RANGING UNITS
  • DUAL MODE CAPACITY FOR
  • DOSE RATE & COUNT RATE
  • AUDIBLE/VISUAL ALARMS

DSM-500 SPECIFICATIONS

Dose/Counts Switch Change Dose Rate to Count Rate by Toggling an External Switch
Display LCD 4-Digit x .75″ LCD w/LED Backlight
Probe MRSP-1
Dose Range 1 µR/hr- 10 mR/hr (Cs137)
Energy Range 40keV – 2 MeV (near tissue equivalent)
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)

MRSP-1 SPECIFICATIONS

General Use Low Level Gamma Dose Rate Measurements
Detector Type 1.5” dia x 1” Plastic Scintillator
CPM Range 0-999.9Kcpm
Dose Range 1 µR/hr- 10 mR/hr (Cs137)
Energy Response 40keV – 2 MeV (near tissue equivalent)
Sensitivity (Cs137 gamma) ≈ 100cpm/µR/hr
Efficiency (4π) ≈ 2%
Background (10 µR/hr) ≈ 900cpm
Operating Voltage 600 – 1100 vdc
Dead Time ≈ 35 µsec
Compatibility All Johnson Rate Meters
Environmental -20°F[-28°C] to 140°F[60°C] 5-95% RH
Connector BNC (other types available)
Dimensions 1.7″ (4.25cm) Dia x 6” (15cm) L
Weight 4 oz (0.11 kg)