Germany BERTHOLD LB200 γ radioactivity measuring instrument
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Brief description:LB200 portable gamma radioactive activity measurement and analysis system, using NaI(Tl) scintillator detector, can measure gamma radioactive contamination of food, liquids, and loose materials. It is scaled and expressed in Bq/l. LB200 uses a microprocessor for self-test. It can automatically self-check after being connected.
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Detailed introduction
germanyBERTHOLD LB200 gamma radioactive activity meter
Product introduction:
l The LB200 portable gamma radioactive activity measurement and analysis system uses NaI(Tl) scintillator detectors to measure gamma radioactive contamination of food, liquids, and loose materials. It is scaled and expressed in Bq/l.
l The LB200 uses a microprocessor to perform self-tests. It can automatically self-check after being connected.
l Detector failure, pulse overflow and low battery can also be displayed
l Many foods contain naturally occurring radionuclidesK-40
l Since the instrument does not have an energy window, the measurement energy range isAbove 40KeV, it can measure the gamma rays emitted by K-40
l per liter of volumeThe activity of 1 gram of K is about 2Bq (related to the scale factor of Cs-137)
l Please refer to the operating manual for some typical foodsTable of K-40 content. Measurement results are displayed in cps or converted to Bq/L
l Under the condition that the counting rate changes, the microprocessor will automatically adjust the displayed value to the new value.
l Under normal circumstances, if the count rate remains unchanged for a long time when testing food samples, the average interval will automatically and continuously extend, so the displayed results will be more accurate. Each measurement will display the statistical accuracy. The user can determine whether the result is accurate and the measurement time based on this value.
l Users can choose the measurement accuracy themselves. In any case, an approximate result can be read a few seconds after the measurement starts
l In addition, the instrument can store and display the measurement results after subtracting the natural background on its own
Product features:
l Detection limit reached20Bq/L
l Measure sample volume0.5 liter
l Small system size
l Simple operation, no misoperation
l Can display the statistical error of each measurement result
l Can operate on dry cell batteries or AC power
l The units that can be given areMeasurement results of nCi/L
l Equipped with a printer interface that can be connected to a computer for data processing
Standard configuration:
l The LB200 detector part includes the amplifier and high-voltage unit, and the electronic system part includes the power supply, accessories for storing and shielding the sample, etc.
l The microprocessor allows non-expert users to directly determine the content of liquids and solids in a simple and reliable way.γ radionuclide activity
Technical parameters:
Probe unit: | NaI(Tl) detector, crystal size: 25mmΦ×25mm |
Probe with built-in threshold amplifier and high voltage generator, probe cable length1.5m | |
Dimensions: | Bottom:95×120mm; height: 185mm (240mm with lead shielding layer) |
Weight: | approx.0.8kg |
Measuring unit: | |
Monitor: | LCD, can display 2×16 characters, 74×28mm |
Measuring range: | 0.1～999cps（1～9999Bq/L） |
Statistical error: | Measurement mode(cps), displays the % error of the measured value; measurement mode (Bq/L), displays the ±Bq/L error |
Scale factor: | The instrument’s internal presets, eachcps is adjustable within 1~255Bq/L |
The scaling factors of each nuclide can be found in the operating guide. | |
The default scale factor is measuredFactors for 137Cs/134Cs | |
Power supply: | 6V power adapter or built-in dry cell battery (4 cells) battery life is about 80h |
The lid has a handle (220×230×70mm length, width, height) weight is about 1.5Kg | |
Connecting device: | Adapter, detector connection cable, printer or computer |
Lead Room: | wall thickness15mm, height 115mm, diameter 120mm, weight about 8kg |
Sample box: | Plastic, effective volume0.5L |
Carrying case dimensions: | 400mm×400mm×180mm |
Displayable fault information and status: | self-test/Probe failure/Measurement limit exceeded/Replace battery |
Acoustic signal: | The measurement accuracy reachesAt 3%, the system will issue a sound prompt |
Scale: | The LB200 displays measurement units in Bq/l scale. True values can still be obtained in the following cases: |
Use the calibrated quantity (0.5L) determined plastic measuring container | |
Measure liquid samples (the designated weight of the measurement sample isAbout 1g/ml) | |
The nuclide components have been determined to be:Cs-137 or s-137/Cs-134 hybrid or J-131 |
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