End Window Probe |
Model 370 |
The Model 370 End Window Probe is an excellent general purpose probe, providing sensitivity to alpha, beta, gamma and X-ray radiation. The end window is mica with a thickness between 1.8 and 2.0 mg/cm2. This allows detection of alpha radiation as low as 3.0MeV when in close proximity to the window. Beta radiation in excess of 35keV and X-ray or gamma radiation greater than 6keV can also be detected. The detector is provided with a BNC connector. It can be used with most count rate and survey meters which accept Geiger-Mueller (GM) detectors, operating at 900V DC. FEATURES: • Economical radiation detection • Detects alpha, low energy beta, low energy x-ray and gamma radiation • Standard 900V operation • End window GM for greater flexibility of measurement • Combines features of heavier wall beta/gamma probe with end window 
sensitivity to low penetrating radiations. |
|
| PROBE CHARACTERISTICS | 2 |
| All Operating Values at V=900V | |
| Background: | ~20CPM |
| Response to Ionizing Radiation 137Cs: |
~2300 CPM/mR/h |
| Plateau Length: | 850V-950V |
| Plateau Slope: | <10%/100V |
| Deadtime (nominal): | ~230 microseconds |
| Temperature Range: | -20ºC to +50ºC |
| Change in Response with Temperature: |
 N< ± 2% |
| Maximum Altitude: | 5000 ft |
| Window: | 1.8 - 2.0 mg/cm2 |
| Window Diameter: | 29.4mm (1.16") |
| Cathode Wall Material: | 28% Cr, 72% Fe |
| Cathode Wall Thickness: | 35.1mm (1.38") |
| Cathode Wall Effective Length: | 47.8mm (1.88") |
| Detector Dimensions: LengthDiameter |
11.3cm (4.45") Less connector 4.1cm (1.60") Including protective plastic cap |
