The RK-1 Rock Sensor package for the KD2 Pro adds increased functionality for measuring hard materials like rock and concrete. Until now good measurements in very hard materials have not been possible.
Using the same technology as other KD2 Pro sensors, the RK-1’s larger diameter allows the use of a 5/32nd inch rotary hammer drill bit to easily create a properly sized pilot hole. Simply coat the the RK-1 with thermal grease, insert, and measure.
|ACCURACY:||±10% from 0.2 – 6 W/(m•K)±0.02 W/(m•K) from 0.1 to 0.2 W/(m•K)|
|MEASUREMENT SPEED:||10 minute read time|
|RANGE:||0.10 to 6 W/(m•K) (thermal conductivity) 17° to 1000ºC • cm/W (thermal resistivity)|
|SIZE:||3.96 mm diameter x 60 mm long|
|OPERATING ENVIRONMENT OF SENSORS:||-50 to 150°C|
|CABLE LENGTH:||0.8 m|
|KD2 PRO FIRMWARE:||KP 1.23.2 or greater|
|Included Accessories||RK-1 Rock Sensor
Pelican carrying case
Performance verification standards
Drill bit for drilling pilot holes in materials
Concrete pilot pin
The KD2 Pro is a fully portable field and lab thermal properties analyser. It uses the transient line heat source method to measure thermal conductivity, resistivity, diffusivity, and specific heat. Sophisticated data analysis is based on 30+ years of research experience on heat and mass transfer in soils and other porous materials.
The compact KD2 Pro controller is much more than a simple readout for time and temperature. A proprietary algorithm fits time and temperature data with exponential integral functions using a non-linear least squares method. This fully mathematical solution delivers thermal conductivity/resistivity to within ±10%.
Temperature changes of a thousandth of a degree per second–the sun warming the soil, for example, or someone walking into the lab– destroy the accuracy of thermal properties calculations. Unlike other thermal needle systems, the KD2 Pro corrects for linear temperature drift that can cause large errors.