I have a Reuter Stokes rs-p4-0820-103 neutron detector tube available for purchase. Asking price is $2500.
This is a 4-atmosphere aluminum body he3 tube just under 2 feet long (I believe the active length is 21" by 1" diameter). I'm the only user of this tube and received this in original manufacturer packaging. It was used for my fusor for about two years and has been in safe storage since. I guarantee this tube works. It is very sensitive and will pick up even a very low output fusor with ease.
I will include the pictured moderator for free if you want to pay shipping. It's just paraffin melted into a paper form.
Please email me at firstname.lastname@example.org
if interested as a rarely go on this site.IMG_20161221_220406 IMG_20161221_220418 IMG_20161221_220457