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KD-2 and KD-2 Pro Thermal Properties Analyzers

Designed by Decagon, a leading US instrumentation manufacturer, the pocket-sized KD2 thermal properties analyzer uses a single sensor to measure thermal conductivity and thermal resistivity. It uses a simple yet precise heating and monitoring system to measure the slope and intercept of the sample specific temperature rise vs. time curve. The KD2 uses this data to calculate and display thermal conductivity in 90 seconds.

The KD2 only weighs 4 ounces and is very durable, making it ideal for carrying from site to site. The small needle size results in very little compaction during installation and allows for a short heating time -- minimizing thermally induced drying around the probe.

KD-2 Pro

The KD2 Pro uses 3 thermal properties sensors to measure thermal diffusivity, specific heat, thermal conductivity and thermal resistivity. The KD2 Pro allows the user to choose an automated mode where the reading is displayed directly or a manual mode where you can download the raw values from each reading for further analysis using a spreadsheet program as required by IEEE and ASTM standards.

Measurement and Analysis

The KD2 Pro uses transient line heat source method to make measurements. A measurement cycle consists of a 30s equilibration time, a 30s heat time and a 30s cool time. Temperature measurements are made at 1s intervals during heating and cooling. Measurements are then fit with exponential integral functions using a nonlinear least squares procedure. A linear drift term corrects for temperature changes of the sample during the measurement, to optimize the accuracy of the readings.

Specifications

	KD-2	KD-2 Pro
Measurement time	90 seconds	2 minutes
Accuracy	5% Thermal conductivity/Resistivity	5% specific heat 5% Thermal conductivity/Resistivity 10% Thermal Diffusivity
Range of Measurement	K: 0.02 to 2 Wm^-1 C^-1 R: 0.5 to 50mC W^-1	K: 0.02 to 2 Wm^-1 C^-1 D: 0.1 to 1.0 mm²s^-1 R: 0.5 to 50mC W^-1 C: 0.5 to 4 MJ m^-3 C^-1
Operating Environment	-10°C to 60°C	-50°C to 150°C
Weight	0.613 kg	0.95 kg
Power	3V Lithium CR2 battery	4 x 'AA' batteries