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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
Category:

FEATURES

  • ALPHA, BETA, GAMMA DETECTION
  • RUGGED METAL HOUSING
  • COMPATIBLE WITH ALL JOHNSON
  • RATE METERS

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)