Frequently Ask Questions
Many answers to common questions about our radiation detectors can be found here. If you can’t find the answer you’re looking for in the FAQs, feel free to submit your own question and we’ll find an answer for you if we can! You can also ask questions about each FAQ in the “Comment on this FAQ” section if you need some elaboration on the answer.
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We recommend your instrument be calibrated annually from the date it was placed in service, but certain industries or applications may require them more frequently. For more information on how to calibrate your device, please click here.
March 31, 2025 at 4:06 pm
We recently purchased an AM7128 Radiation Area Monitor. I tested the two units connected via an ethernet cable (one inside the vault, the other outside). the unit inside the vault lights up while unit outside does not. Any reason for this?
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You should get about 10-20 counts per minute just from background with the Monitor 4. This means that you should get 10-20 flashes of the LED, or flash and beep if it's in audio mode. If you are getting a good battery and nothing when you put it up to a source, it could be a bad tube.
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Not currently. Neutrons are too high of an energy and too fast for standard GM tubes to detect. Neutrons need to be slowed down in order to detect them using a (BF3) boron trifluoride (uses a neutron to alpha particle conversion to get a measurement)or a High Pressure Helium 3 probe (uses a neutron to positron conversion to get a measurement).
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The Digilert detects alpha down to 2.5 MeV
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The dwell time (upper right of the screen.) is set to a longer value than the Meter Response time next to the analog needle. The settings are 60 seconds for the dwell time and 1 second for the meter. A quick spurt of five counts would make the needle jump to higher since it is integrated over a brief amount of time. The dwell time would, in this case, integrate over a longer period of time and thus smooth out these statistical variations.
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