FEATURES
- ALPHA, BETA, GAMMA DETECTION
- RUGGED METAL HOUSING
- COMPATIBLE WITH ALL JOHNSON
- RATE METERS
HP-265
ALPHA-BETA-GAMMA PANCAKE PROBE
The HP-265, commonly known as the “Pancake” probe, has become the most popular detector for the general measurement of Alpha, Beta, and Gamma measurements. Built inside a ruggedized housing, this detector is the best general detector for most types of measurement applications. This detector operates between 850 to 1000 volts and is compatible with any Johnson instrument capable of supplying 900 Vdc.
| SPECS | HP-265 |
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) |
