Home › Forum › Hardware › Add CI-21BG (SI-21BG) to KIT1 options?

Log In Register Lost Password
Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
    Posts
  • April 25, 2025 at 5:37 pm #29908
    hexbus
    Participant

    Electronics Goldmine has these on sale, and I’ve been able to get these hooked up – although, there’s no options in the source for them:

    G24780 ^ CI-21BG Russian Beta & Gamma Geiger Tube

    How easy/hard would it be to add these to the detector.h and detectors.cpp to get them to work? Right now, it’s seeing it as a SBM-20, and I know I would need to recompile.

    The only specs I can find on them are:

    Working range of Dose POWER: 50R/h
    Working Voltage: 350-450V
    Maximum registering range: 1000 Roentgen/hour
    Plateau Length/ Inclination: 100V/0.15%/V
    Current sensitivity: 0.4 – 0.7 uA/R/h
    Maximum current: 12-20 uA
    Length: 70mm
    Diameter: 10mm

    April 25, 2025 at 5:44 pm #29909
    hexbus
    Participant

    Edit: I found some conversion factors here: https://radmon.org/index.php/forum/geiger-muller-tubes/43-conversion-factors?start=0

    August 26, 2025 at 6:24 pm #30035
    uRADMonitor
    Keymaster

    Do you need help with the firmware? I can compile it for you, to include this new tube. Let me / us know.

  • Author
    Posts
Log In Register Lost Password
Viewing 3 posts - 1 through 3 (of 3 total)
  • You must be logged in to reply to this topic.