The Delmhorst BD-10 Moisture Meter Package, includes the BD-10 Meter along with a 21-E Hand Electrode with 3 1/4" penetration.  This package is mainly used for hard to reach places using the 21-E Hand Electrode.

Overview of Delmhorst BD-10 Moisture Meter Package: 

The Delmhorst BD-10 Moisture Meter is easy to operate and easy to read.  The BD-10 measures moisture in wood and other non-wood building materials. For those who prefer an analog display, the Delmhorst BD-10 is a great alternative to the Digital Delmhorst BD-2100.

The Delmhorst BD-10 is a pin moisture meter.  You can easily take readings in flooring, studs, subfloors, with a wood scale moisture range of 6-40% and a reference scale of 0 to 100 on a relative basis for materials other than wood.  The BD-10 is a great entry level meter, and is ready to go with a single button press.

Features of the Delmhorst BD-10 Moisture Meter Package incl. 21-E 3.5" Electrode:

Specs of Delmhorst BD-10 Moisture Meter Package incl. 21-E 3.5" Electrode: