Delmhorst BDX-20 Digital Pin Moisture Meter for Building Materials

Delmhorst BDX-20 Overview

The Delmhorst BDX-20 is a professional pin-type moisture meter designed for building trades rather than one material alone. Delmhorst positions it for wood, drywall, roofing, insulation and flooring, which makes it especially relevant to inspectors, restoration professionals and contractors who move between different materials during the same job.

Its pin-based measurement method gives users a defined test point. That can be useful when confirming a suspicious location after a broader visual inspection, although the pins do leave small holes in the material.

Wood, Drywall and Reference Scales

The BDX-20 provides a 6–60% moisture-content range for wood, a dedicated 0.1–6% drywall scale and a 1–100 reference scale. The separate drywall scale is useful because drywall should not be interpreted as though it were solid wood.

The reference scale is intended for comparative work on other building materials. A practical approach is to establish a reading in an area believed to be dry and compare suspect locations against that baseline rather than treating the reference number as a universal moisture percentage.

Statistics for Inspection and Drying Work

The meter stores up to 100 readings and calculates high, low, average and standard deviation statistics. During restoration or inspection, repeated readings can provide a clearer picture of how conditions vary across a wall, floor or other building component.

This also makes the meter useful for follow-up visits. Readings taken in consistent locations can help show whether drying conditions are moving in the expected direction.

Temperature Correction and External Electrodes

Wood-temperature correction is available over a broad range, and the BDX-20 is compatible with Delmhorst external electrodes. External probes can extend the instrument into harder-to-reach areas or deeper measurements where the built-in pins are not sufficient.

An internal calibration check, user-selectable alarm and large auto-backlit display round out a feature set aimed at repeated field use rather than occasional household checks.

Who Should Choose the BDX-20?

The BDX-20 makes the most sense for professionals who want one reliable pin meter for wood, drywall and comparative building-material measurements. It is particularly suitable for building inspection, restoration and flooring-related investigations.

If the main goal is fast, non-destructive scanning across finished floors or walls, a pinless meter is usually more convenient. For dedicated quantitative concrete slab testing, a purpose-built concrete meter is also a better fit.