DA Series Air Flow type Alpha-Beta Low-Level Counter
Product introduction
DA series (1-8 channels) Low-Level α/β Counter is a precision instrument for measuring low-level α, β radioactive intensity. It can be used for the measurement of total α and total β radioactivity in water, soil, building materials, ores, aerosols, food, cetc. It is suitable for the measurement of low-level α/β radioactivity in radiation protection, environmental protection departments, medical, biological, agricultural, scientific research institutes and colleges and universities. The instrument is a series of products with 4 models and specifications: DA-101, DA-102, DA-104, DA-108. The instrument meets the verification requirements of JJG1100-2014 air flow proportional counter total α and total β measuring instrument.
Features
• Low background count, high particle detection efficiency;
• The thin-window gas-flow proportional counter tube is used as a detector, and the counter coincidence between the shielded counter tube and the measurement counter tube is used to reduce the interference of radioactivity in the surrounding environment on the measurement;
• The detection efficiency of 14C low-energy β-rays is ≥40%; it is better than similar detectors with semiconductors and scintillators as probes.
• The mass thickness of the gas flow proportional counter tube window is ~2μg/cm-2, the area of the measurement window is Ø60mm, and the sample area is Ø55mm.
• With PC application software, parameters such as high voltage and threshold can be set on the PC side. Simple operation interface, each channel can work and calculate independently; can directly obtain the radioactive specific activity Bq/L or Bq/Kg of the measured sample.
Technical parameters
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Item
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Specification
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Detector
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Thin window flow gas proportional counter tube (effective area 28cm2)
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Background count
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α≤0.0017cm-2·min-1 β≤0.0354cm-2·min-1
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Detection efficiency
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α source: 241Am≥78%; β source: 90Sr-90Y≥65% 14C≥40%
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Repeatability
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210Po α ≤ 1.5%; 90Sr-90Y ≤ 2.0%;
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Cross channel ratio
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α to β channel ≤ 1% (210Po source); β to α channel ≤ 0.1% (90Sr-90Y source)
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Power supply
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AC 220V 50Hz
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Power consumption
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≤250 VA
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Ambient temperature
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0-45°C
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Relative humidity
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≤90%
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Product Tags:
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DA Series Air Flow type Alpha-Beta Low-Level Counter Images
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