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Pancake GM Detector
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Operating Voltage 900 + 50 Vdc
Plateau Length 100 Volts minimum
Plateau Slope 0.1 % per V maximum
Dead Time 50 μs maximum
Temperature Range -30 °C to 75 °C (-22 °F to
167 °F)
Mica Window Thickness 1.4 to 2.0 mg/cm2
Mica Window Size 4.45 cm dia. (1.75”)
Active Area 15.5 cm2 (2.4 in2)
Beta Efficiencies 137Cs = 22%, 60Co = 16%, 90Sr 90Y = 32%, 99Tc = 15%, 14C = 6%
Alpha Sensitivity 3 MeV at window
Connector BNC
Size (9.75” L x 2.68” W x 2.75” H)
Weight 0.23 kg (0.5 lb)
489-110D Pancake Probe $489.00
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End Window GM Detector
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Radiation Detected Alpha > 3 MeV, Beta > 45 keV, Gamma > 6 keV
Window/Wall Material Mica
Window/Wall Thickness 1.4 to 2 mg/cm2
Window Area 6.8 cm2
Dead Time 200 µs nominal
Saturation > 5R/h
Efficiency C-114 10%; 147-Pm 20%;
99-Tc 35%; 36 Cl 35%; 90-Sr/
90-Y 45%; 239-Th 50%
Size/Weight 4.5” x 1.4”; 5.5 oz
489-35 Thin End Window Probe $990.00
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Scintillation Detector
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Type NaI (Tl) Sodium
Iodide 1 x 1,
scintillator optically
coupled to PMT
Radiation Detected Gamma and x-ray
> 60 keV
Typical Background (cpm) 1750
Nominal Sensitivity 160,000
cpm/mR/hr
137Cs
Wall Material 0.04 in Al,
1 mm thick
Window 108 mg/cm2
Al
Sensitive Area 5 cm2
Crystal Dimensions 1 x 1 in.
Probe Diameter 2 in.
Probe Length 8.75 in
Cable Length 48 in.
Operating Voltage 900 V
Calibration 137Cs
2 pts/scale to
10 mR/hr
Efficiency 137 Cs 6%;
57Co 9%;
133Ba 6%;
60Co 2%
Operating Temperature - 40° to + 120°F
- 40° to + 50°C.
Max. temp
increase
of 20°F/hr
Weight 1.5 lb
(0.68 kg)
489-50 NaI Scintillation Probe, 1” x 1” $1,279.00 |
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Energy Compensated GM Detector
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Radiation detected Beta above 200 keV, Gamma above 12 keV
Operating voltage 900 V
Plateau length 100 V (min)
Plateau slope 0.1%/V (max)
Temperature range - 40° to + 167°F
(- 40° to + 75°C)
Relative humidity 0 to 95%, noncondensing
Wall thickness 30 mg/cm2 (tube)
Wall material Stainless steel
Maximum background 15 CPM
Nominal sensitivity 720 CPM/mR/hr
Maximum exposure rate 1 R/hr
90-12 Energy Compensated GM Detector $888.00 |
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