Portable Meters

Click on any product below to view information.

The TLS-100, THW-L2, TPS M1 are economical, easy to use thermal conductivity meters (ASTM & ISO) for solids, liquids, pastes, and powders.
Click on any of the models above to view more information or click one of the three options below to help you choose the right model and method for your testing needs.

Thermal Conductivity Portable Meter Customer Comment TLS-100 Icon


The portable transient line source TLS-100, designed with ease of use and convenience in mind, is capable of testing soils, rocks, concrete and polymers for thermal conductivity and thermal resistivity.
ASTM D5334 & D5930, & IEEE 442-1981
0.1 to 5 W/mK

Portable Thermal Conductivity Meter THW-L2


The transient hot wire THW-L2 is well known for high accuracy thermal conductivity measurements of liquids and pastes. Measurements may be performed with a simple push of a button or with the included Windows software.
ASTM D7896
0.01 to 2 W/mK

Portable Thermal Conductivity Meter TPS M1


The TPS M1 is designed for measuring the thermal conductivity, thermal diffusivity, specific heat and thermal effusivity for solids, pastes and powders, which are low to mid-range thermal conductivity materials, like foam insulation, rock and concrete. Measurements may be made in single-sided or two-sided TPS sensors.
0.03 to 40 W/mK


Getting detailed pricing is fast & easy. Simply fill out one of the online forms, contact us, or have us contact you to get the requirements.

Find a Product

Purchasing a thermal conductivity testing system can be complex.  Thermtest has simplified things with Product Compare, Product Finder, and Method Comparison. If you still have questions regarding which product is right for you, please don't hesitate to request a demonstrations or contact us.

 Thermal Conductivity Applications TPS

Compare Products

An easy to use side-by-side comparison. Click and drag products to the boxes below to compare features.

Thermal Conductivity Laboratory Instrument Portable Meter Product Finder

Product Finder

Select a material, set your options by dragging the silver ring, then click on an image in section 3 to view a match.

Thermal Conductivity Laboratory Instrument Portable Meter Product Finder

Method Comparison

A convenient list to quickly compare specifications of 8 methods. Scroll horizontally to view the chart or download a PDF copy.

Demonstration Corner

Find a variety of recorded, live and one-on-one by request product demonstrations, webinars, and additional interesting technical videos. Request a free demonstration to see how a thermal conductivity measurement or thermal resistance test is completed.

Posts from our blog

Uncertainty of Calibration Calculator

Thermtest is happy to introduce the new Uncertainty of Calibration Calculator. The calculator determines the uncertainty of comparative thermal conductivity methods. Simply select the desired calibration material and the instrument, and the calculator will output their combined level of uncertainty, expressed as a percentage.

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