The NORM-PKP includes the DSM-525, a GM Pancake Probe (CPM) and MSRP-1 Plastic Scintillation probe (Dose Rate). The combination of the two probes is perfect for measuring NORM and TENORM radiation. The NORM-PKP also offers the advantage of very little over-response to lower energy gammas, resulting in truer measurements which should result in fewer alarms from detector over-response. The Pancake and Scintillation probes are both connected to the instrument at the same time so the user can switch between them at any time without having to power the instrument down. The Instrument boasts an oversized auto-ranging digital display with features that include a scaler for counts per unit of time, display error indications, and audible/visual ALARMS.
| SPECS | NORM-PKP |
| Dose/Counts Switch | Change Dose Rate to Count Rate by Toggling an External Switch |
| Display | LCD 4-Digit x .75″ LCD w/LED Backlight |
| Two External Probe Inputs | 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) |
| General Use | Alpha, Beta, Gamma Detection |
| Detector Type | Halogen-Quenched GM Pancake Tube |
| CPM Range | 0-999.9 Kcpm or Kcps |
| 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 |
| Dimensions | 2.74″ (7cm) Dia x 11″ (28cm) L |
| Weight | 1lbs (0.45 kg) |
| General Use | Low Level Gamma Dose Rate Measurements |
| Detector Type | 1.5” dia x 1” Plastic Scintillator |
| Dose Range | 1 µR/hr – 10 mR/hr (Cs137) |
| Energy Response | 40keV – 2 MeV (near tissue equivalent) |
| Sensitivity (Cs137 gamma) | ≈ 100 cpm/µR/hr |
| Efficiency (4π) | ≈ 2% |
| Background (10 µR/hr) | ≈ 900 cpm |
| 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 |
| Dimensions | 1.7″ (4.25cm) Dia x 6” (15cm) L |
| Weight | 4 oz (0.11 kg) |
