These two models appear very similar to each other, utilizing the same keypad and software, however the 3440 Plus offers many features never before seen on a nuclear gauge. These brand new features include: a remote start keypad, USB data transfer option, loud external beeper, and GPS capabilities (optional).

Meet ASTM Standards:
ASTM D-6938 (which replaced ASTM D-2922 and ASTM D-3017 as of November 2006), D-2950, and C-1040

Troxler 3430 & 3440 Plus Brochure (Nuclear Density Gauge)