4th Generation Ludlum Wm. B. Johnson Geiger Counter Gsm-110

US $300.00

  • Poway, California, United States
  • Jun 9th
Will come with a 3 foot BNC-BNC cable, the thin window mica end window probe. This is another eberline spinoff, by an eberline engineer who thought "wow, I can do this better!" Much like Mr. Ludlum, Mr. Johnson jumped in to the field with very little overhead capital, and started making gainer counters in the are where he knew they were needed most: the 0-20mr/hour range. The distinctive blue color is actually quite helpful if you're in a grab and go situation. These aren't the counters I would prefer at a plant emergency site, but for rock and mineral collecting, they are nothing short of perfect! The meters are simple to use: turn the meter on to one of the three scales; X1, x10, or x100, and use it. If you want to know where the high voltage is set, press the high voltage switch, and it will show you on the meter face. Want to know how well the batteries are holding up? (It uses either one or two 9v batteries, your choice) Press the battery button and it will show you he remaining voltage on the same meter face. These are made with the ease of use in mind, without sacrificing quality in ANY way. This is a fully functional meter. There are additional advanced features which require turning potentiometers inside the case and such, you can find those in the manual. The probe: This is an eberline HP-190 end window probe. It can detect alpha, beta and gamma radiation. When capped with polymer, this is one of the probes which will show you a real, accurate dose during use of the meter. The slower you have the needle set to move, the higher the accuracy the dose will be. I've head many praises but never a single complaint about these meters. If I happen to sell one to somebody who needed a loaner and liked the Johnson better, they gladly give up all sorts of crazy stuff to keep them. This is buy this along with the other Johnson meter I'm listing, and you'll have a smurf army of counters for under $600. The probes are interchangeable, and each meter has a wide impedance tolerance. Plus the anti saturation automatically disables when it recognizes a scintillation probe, so virtually any scintillation probe can be used on these meters, Enjoy!
Condition:
Seller refurbished: An item that has been restored to working order by the eBay seller or a third party not approved by the manufacturer. This means the item has been inspected, cleaned, and repaired to full working order and is in excellent condition. This item may or may not be in original packaging. See the seller’s listing for full details. ...
MPN GSM-110
Brand Johnson

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