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 W/ HP-265 PROBE
Plus Internal GM Detector
The DSM-506 combined with the HP-265 PROBE 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 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 W/ HP-265 PROBE |
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) |
