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Thread: Laser Power Meter with Nixie Tubes

  1. #1
    Join Date
    Jun 2009
    Mesa, AZ

    Default Laser Power Meter with Nixie Tubes

    Just received the old laser power meter shown in the link. It's a United Detector Technology model 21-A, with a nixie tube display that still works. I know UDT started making meters in 1967, and I'm wondering when they might have made the switch to the 7-segment LEDs I see on another of these units I see now on Ebay-UK. Anyway, I can't wait to open it up and straighten the tubes!

  2. #2
    Join Date
    Jan 2007
    Yorkshire, UK


    Cool Bob. There's something about Nixie Tube displays
    Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.... Douglas Adams 1952 - 2001

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