RH BluePeg moisture metering uses embedded sensors to gauge humidity of a slab. Optional Bluetooth technology enables collecting readings from several sensors with a PDA, simplifying and speeding the data collection process. Lignomat USA Ltd. 800-227-2105. www.lignomat.com.

Used to test hardened or hardening concrete, the Accuscan radio frequency meter emits radio waves that penetrate ¾ in. into a surface. Features include durable electrode pads, built-in battery and calibration checks, and easy-to-read analog display. Delmhorst Instrument Co. 877-335-6467. www.delmhorst.com.

Bore-hole test

The Humicap HM44 structural humidity measurement kit accurately gauges moisture in concrete slabs and in renovation projects to help determine its source. To use, bore a hole to the required depth, vacuum, insert a plastic sleeve, and place the probe inside. After the humidity in the hole reaches equilibrium, connect the indicator to the probe cable and take a reading. For use in new or existing slabs. Vaisala Instruments. 781-933-4500. www.vaisala.com.

The Proti-meter MMS Plus combines hygrometry, pin, and pinless measurements for rapid, accurate evaluation of a slab's moisture level. Operators can conduct rapid surface tests before more in-depth evaluation, or use the replaceable Hygrostick probes. GE Sensing & Inspection Technologies. 800-321-4878. www.protimeter.com.

Internal moisture measurement

To use this moisture meter, drill a 7/16-in. hole to about 40% of the overall depth of a slab, vacuum, and then seal. After the area reaches equilibrium, insert a SlabSafe sensor with a rubber ring to ensure proper sealing. Take accurate humidity measurements within minutes of placing the sensor. Bone Dry. 262-564-8422. www.bonedryproducts.com.