The Delmhorst 26-ED hammer probe for measurement of hardwood ships with 2 insulated 1 1/8" penetration pins installed. This is a variation of the most popular Delmhorst hammer probe (the 26-ES). The 26-ED adds the extra feature of a depth gauge, for measuring pin penetration, to the standard probe.
It includes a package of spares, including replacement washers, 1/2" penetration insulated pins, one set of spares of the installed pins, and a pair of 1/2" penetration UNinsulated pins.
Used to measure moisture in hardwood, paired with any suitable Delmhorst meter (see suggestions under Related Products).
Delmhorst also offers a second hammer probe, the 18-ES, for deeper penetration into timber. This hammer probe is also available with a depth gauge, as the 18-ED.