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DSM-500 MRSP-1

Low Dose Measurements

The DSM-500 combined with the MRSP-1 allows the user to make near tissue equivalent low dose measurements. The rate meter boasts an oversized digital display with a 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.

SPECS DSM-500_MRSP-1

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)