Overview

Mini VLQ now available

New Mini VLQ needle probe for thermal conductivity meter TK04The new Mini VLQ is a 50 mm long needle probe with a diameter of 2 mm for small samples. It can be used where standard size probes are too large for the available sample dimensions. This includes compressible materials like soil samples which cannot be tested with the already available Mini HLQ for plane surfaces.

Use the Mini VLQ for samples with a minimum diameter of 40 mm and a minimum length of 60 mm. The Mini VLQ has a measuring range of 0.3 to 6 W/mK and an accuracy of ± 5%.

 

New Mini VLQ   ˅

Specification TK04

standard: ASTM D5334-08

meas. range: 0.1 to 10 W/mK

temp. range: -25 to 125°C

accuracy: ± 2%

Thermal Conductivity Meter TK04

Thermal conductivity meter TK04 and probe for plane surfacesTK04 is a fast field and lab thermal conductivity meter with an accuracy of ± 2% and a measuring range of 0.1 to 10 W/mK, suitable for testing a wide range of sample materials at temperatures between -25 and 125°C. more

Needle probe method complies with ASTM D5334-08

Heating curve od a TK04 thermal conductivity probe / TK04 heating curve The transient line-source method used by TK04 complies with ASTM D5334-08 and yields absolute thermal conductivity values without requiring any time-consuming reference or comparison measurements. more

Highly Accurate Evaluation Method

An interlaboratoty study conducted by ASTM International indicated an accuracy of between ± 10% and ± 15% for the line-source method. For TK04, an improved evaluation procedure as well as methods for checking sample preparation and measuring conditions were developed, resulting in an accuracy of ± 2%. more

Modified Needle Probe Method for Hard or Brittle Sample Materials

TK04 needle probe and probe for plane surfacesHard or brittle sample materials are difficult to prepare for inserting a needle probe. Our modified line-source method uses a needle embedded in the underside of a cylinder-shaped probe body which is just placed on top of the sample surface (probe for plane surfaces). more

Fully Automated, Software-controlled Measuring and Evaluation

The provided TK04 software runs complete measuring series fully unattended, evaluates them and saves data and results directly to a PC or notebook. Reports can be printed as a diagram or list, or saved to a file. more

Checking Tools for Sample Preparation and Measuring Conditions

TK04 software: automatic temperature drift controlThermal conductivity tests are sensitive to factors like the contact between probe and sample, sample size, heating power, convection (for moist samples) or temperature changes. The TK04 software provides tools for detecting these influences. The temperature drift of the sample is continuously monitored and automatically corrected. more