Measurement of relative humidity transmission in concrete floors can prevent mold growth and future moisture damage to expensive floor coverings and coatings. Relative Humidity (RH) measurement provides a complete profile of moisture content throughout the depth of the concrete slab, not just the surface.
A 0.625in (16mm) borehole is drilled in the concrete to the specified depth and lined with a plastic sleeve. The boreholes are allowed to reach temperature and moisture equilibrium, then a probe is inserted and connected to an electronic meter for periodic measurement of humidity levels. Probes are installed below the floor surface and covered with a cap between readings, and therefore do not interfere with normal construction activities.
Concrete Humidity Measurement Kits by Lignomat meet ASTM F2170 requirements and provide a complete set of equipment needed for Relative Humidity (RH) testing. NIST-certified RH BluePeg Probes are easily recovered at the completion of testing for reuse. Each kit includes a Relative Humidity Meter with cable, one BluePeg RH Probe, and ten plastic sleeves with caps. An RH Adaptor is provided to connect the probe directly to the meter for ambient temperature and humidity readings. Components are contained within a foam-lined, hard plastic carrying case. Additional Probes and Sleeves are available separately for increased efficiency when testing larger areas, Calibration Check Solutions for checking performance, and brush and vacuum attachments for borehole cleaning and preparation.
CT-50 Concrete Humidity Measurement Kit is equipped with the CT-50B Tec RH Meter to read the RH BluePeg Probes using the provided cable or adaptor. The meter features a large LCD display that indicates relative humidity, temperature, dew point, and GPP (weight in grains of water per pound of air) with 0.1 resolution for all ranges. Relative humidity accuracy for probe and meter system is ±2% for 10–90%, and ±3% for 0–10% or greater than 90%. Temperature accuracy is ±0.5° for 32°–120°F (0°–49°C), plus ±1° from 5°–32°F (-15°–0°C) and from 120°–160°F (49°–71°C). The CT-50B Meter also functions independently as a thermo-hygrometer to measure ambient conditions and is also available separately with an adaptor and one BluePeg Probe.
CT-51 Concrete Humidity Measurement Kit features the versatile CT-51B DuoTec BW Meter to read the RH BluePeg probes as required for ASTM F2170 tests. The Meter also doubles as a non-invasive moisture meter to measure near-surface moisture levels on a relative scale when held on a flat surface. It has selectable measuring depths of 0.25 and 0.75in (6 and 19mm) for concrete, gypsum, and wood materials and meets ASTM F2659. A large LCD display indicates relative humidity, temperature, dew point, and GPP (weight in grains of water per pound of air) with 0.1 resolution for all ranges. Relative humidity accuracy for the probe and meter system is ±2% for 10–90%, and ±3% for 0–10% or greater than 90%. Temperature accuracy is ±0.5° for 32°–120°F (0°–49°C), plus ±1° from 5°–32°F (-15°–0°C) and from 120°–160°F (49°–71°C). The meter also functions independently as a thermo-hygrometer to measure ambient conditions by using the RH BluePeg Probe and Adaptor from the kit. CT-51B is also available separately.
Features:
- Kits contain all products needed for testing relative humidity
- Probes are NIST-certified, recoverable, and reusable
- Meets ASTM RH testing standards
Included Items:
- LignoTec RH Meter
- RH BluePeg Probe
- RH Adapter
- RH Cable
- 10 Sleeves with Caps
Accessories:
- RH BluePeg Probes fit in boreholes drilled in concrete for RH testing; available as a single unit, or in packages of 3, 5, or 10
- Plastic Hole Liner Sleeves w/ Caps accurately position probes in 4in (101.6mm) thick floor slabs
- CTA-19 Liner Sleeve Top Extenders provide moisture protection when probes stick up higher than the concrete surface
- RH Adapters connect probes to Tec or DuoTec Meters for use as handheld thermos-hygrometers
- CTA-27 Clean-Out Brush cleans debris, dust, etc. from boreholes before inserting liner sleeves
- CTA-29 Vacuum Attachment attaches to user’s shop-vac to more thoroughly clean debris from the borehole
- CTA-32 RH Concrete Cable is used to connect the probe to the moisture meter
- CTA-34 Calibration Check Salt Solution for ensuring RH BluePeg Probes are operating properly
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