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KD2 Pro Thermal Properties Analyser from Decagon Devices of USA

The KD2 Pro is a fully portable field and lab thermal properties analyzer. It uses the transient line heat source method to measure thermal conductivity, thermal resistivity, thermal 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.
Excellent Accuracy
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 nonlinear least squares method. This fully mathematical solution delivers thermal conductivity/resistivity to within ±10%.

Corrects for Temperature Drift
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.

ACCURACY:

± 5 to ± 10% Thermal Conductivity/Resistivity
± 10% Specific Heat
± 10% Thermal Diffusivity

MEASUREMENT SPEED:

1, 2, 5, & 10 min. read times depending on measurement type (see user's manual for more information). 

DATA STORAGE:

4,095 readings, flash memory

COMPLIANCE TO STANDARDS:

ASTM Standard D5334-08 and IEEE Standard 442-1981

OPERATING ENVIRONMENT OF SENSORS:

-50° to 150°C

BATTERY SOURCE:

4 AA

AUTO-READ MODE:

Users can collect unattended data at user-defined intervals in the auto-read mode

TYPE:

Ultra low-power 16-bit microcontroller w/ 24-bit A/D converter

DISPLAY:

Liquid Crystal Display (LCD) 7.5 cm x 4 cm

CASE DIMENSIONS:

15.5 cm x 9.5 cm x 3.5 cm 

INCLUDED ACCESSORIES:

KS-1 Thermal Conductivity/Resistivity sensor (for liquids)
TR-1 Thermal Conductivity/Resistivity sensor (for solids)
SH-1 Dual-Needle Thermal Diffusivity and Specfic Heat sensor (for solids)
User's manual
Pelican carrying case
Readout stand
Performance verification standards
Thermal grease
Drill bit for drilling pilot holes in materials 
Concrete pilot pin
KD2 Pro download utility
RS232 cable

CALIBRATION:

Each KD2 Pro comes factory calibrated and includes performance verification standards

RANGE OF MEASUREMENTS:

K: 0.02 to 4 Wm-1 C-1
D: 0.1 to 1.0 mm2s-1
R: 0.25 to 50mC W-1
C: 0.5 to 4 MJ m-3 C-1