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DSM-506 HP-265

Plus Internal GM Detector

The DSM-506combined with the HP-265 gives the user great flexibility when surveying for contamination from alpha, beta or gamma isotopes plus the ability to survey for gamma dose rates up to 2000 mR/hr. The rate meter boasts an oversized digital display and has a unique counts to dose capability allowing the user to quickly change from count rate to dose rate and back 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-506_HP-265

FEATURES

  • SURVEY FOR ALPHA, BETA AND GAMMA CONTAMINATION
  • SURVEY FOR GAMMA DOSE RATES UP TO 2000 mR/hr
  • LARGE DIGITAL DISPLAY
  • AUTO RANGING UNITS
  • DUAL MODE CAPACITY FOR
  • DOSE RATE & COUNT RATE
  • AUDIBLE/VISUAL ALARMS

DSM-506 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
Internal Detector Energy Compensated GM Tube
Energy Range 60 keV – 3 MeV
Internal Detector Dose Range 50 μR/hr-2000mR/hr or equivalent Sv/hr
External Probe Connector All Johnson Probes
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 5.25"(14cm) H X 4" (10cm) W x 7"(18cm) L
Weight 2.5 lbs. (1.2 Kilos)

HP-265 SPECIFICATIONS

General Use Alpha, Beta, Gamma Detection
Detector Type Halogen-Quenched GM Pancake Tube
CPM Range 0-999.9 Kcpm or Kcps
Dose Range 0-200 mR/hr (Cs137) – Requires linearization above 50 mR/hr
Window 1.7 ± 0.3 mg/cm2 mica, protected by a Copperl screen (79% open)
Window Area Active – 15.5 cm2 (2.4 in2)
Open – 12.3 cm2 (1.9 in2)
Efficiency (4π) C14 – 5%, SrY90 – 22%, Tc99 – 19%, P32 – 32%
Energy Response Energy Dependent
Sensitivity (Cs137 gamma) ≈ 3300 cpm/mR/hr
Operating Voltage 900 vdc
Dead Time 80 µsec
Normal Background ≈ 60 cpm
Environmental -20°F[-28°C] to 140°F[60°C] 5-95% RH
Connector BNC (other types available)
Dimensions 2.74" (7cm) Dia x 11" (28cm) L
Weight 1lbs (0.45 kg)