Probe |
Model 3012/3012MHV |
The Model 3012 & 3012-MHV consist of thick walled Geiger-Mueller (GM) tube detectors in a heavy wall sliding shield holder. The detector has an integral three foot straight cable, terminated in a BNC connector for the Model 3012, and an MHV connector for the Model 3012MHV. These detectors are designed to be used in the detection and measurement of medium and high energy x-ray and gamma radiation and high energy beta radiation. This probe, when used with the Model 3100 Survey Meter, will measure radiation fields in excess of 1R/h. This meets the requirements of 10CFR34, while still providing general survey capability with a hand held probe. FEATURES: • Detects medium and high energy x-ray and gamma radiation, as well as  high energy
beta• Sliding window which provides energy discrimination capability • Standard 900 volt operation • Compact detector size • High radiation level measurement |
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| DETECTOR CHARACTERISTICS | 2 |
| Background: | @V=900V <15cpm |
| Response to
Ionizing: Radiation (Cs137) |
@V=900V 1000 cpm/mR/h |
| Anode Resistor: | None in detector housing |
| Plateau Length: | 850V-1100V |
| Plateau Slope (%/100V): | 10% |
| Deadtime (nominal) @V=900V: | 100µsec |
| Temperature Range: | -55 C to 75C |
| Change in Response: with Temperature |
 N< + 2% |
| Wall Thickness of Detector: | 30-45mg/Cm2 |
| Wall Material: | 446SS |
| Quench Gas: | Halogen |
| Active Length: | 0.75" |
| Diameter of Detector (effective): | 0.625" |
| Wall Thickness of Sliding Window: | 3.64 g/cm2 |
| Window Material: | Brass |
| Window Size (total area): | 0.5" x 0.9" (1.3cm x 0.8cm) |
| Detector Size: | 5.1" x .94" (13cm x 2.4cm) |
| Detector Weight with Cable and Connector: |
12oz. (340g) |
| Cable Length (straight): | 3ft. |
| Operating Voltage: | 900V |
| Nominal Charge per Pulse: | 2.7 x 10-9 coulombs |
