Select Page

Asset 1 TESTING INSULATION FOR THERMAL PROPERTIES IS EASY WITH THE HFM-100

The HFM-100 Heat Flow Meter method is an easy-to-use rapid technique for thermal conductivity measurement and thermal resistance measurement of insulation products, construction materials, packaging, and assemblies. The Thermtest HFM has been designed and engineered to combine the highest accuracy, repeatability, widest temperature range, and industry-leading performance, all at an exceptional value. Follows international standards: ASTM C518, ISO 8301, and EN 12667.

Testimonials

UAB EKOREMA

“We purchased the HFM 100 more than a year ago and was not disappointed because this instrument works perfectly. Thermtest worked quickly and with dedication. Tests are performed every day, but HFM-100 works like new. Recently we get a new software program. Michael helped us a lot. We are very glad that we had chosen this company.”

EFP CORP

“Dale was a HUGE help in regards to helping us better understand our application and what equipment (TPS 500 & HFM-100) we needed. Thermtest also allowed us to send samples in prior purchasing to make sure they understood the materials we work with. Michael did a great job of helping us set up the instruments and periodically checked in to make sure we had all our questions answered. He even did a follow-up training session upon request.”

GLASSFIBER DEL NORTE

“Thermtest and Craig Dixon thank you very much for your time and support. We are looking forward to our next tests and service.”

WE KNOW THE THERMAL CONDUCTIVITY OF INSULATION IS IMPORTANT

Thermal conductivity has a large influence on the effectiveness of insulation materials. Gases have poor thermal conduction properties contrasted with fluids and solids, and in this way makes a decent insulation material in the event that they can be caught. The air-catching property is likewise the insulation rule utilized by many animals to remain warm, for instance, feathers, and insulating fur like a sheep’s fleece. In these two cases, the essential insulating material is air, and the polymer utilized for catching the air is a keratin protein. With the end goal to achieve gas cell development in man-made thermal insulation, fiberglass and polymer materials can be utilized to trap air in a foam-like structure. This technique is utilized in a huge number of industries, but the common thought of example is in building and piping insulation. Space heating and cooling systems circulate warmth all through structures by pipes or ventilation work. Protecting these pipes and ducts from heat loss by utilizing insulation diminishes heating costs and prevents pipes from freezing. Window insulation film can be applied in weatherization applications to lessen thermal radiation in summer and cold in winter. Some notable insulation materials are fiberglass (glass wool), cellulose, rock wool, polystyrene foam (styrofoam), urethane foam, vermiculite, perlite, and cork. Catching air is likewise the guideline in all very insulating clothing materials, for example, wool, down feathers and fleece. Thermal insulation is likewise utilized as a part of the Aerospace industry. Launch and reentry put serious mechanical weights on spacecraft, so the quality and strength of the encasing insulation are essential. Examples of insulation spacecraft incorporate fortified carbon-carbon composite nose cone and silica fiber tiles of the Space Shuttle. 

 That is why we developed the HFM-100

 

At Thermtest we recognized there was a need for a testing device that was simple to use, versatile, reliable, and accurate. The HFM-100 thermal conductivity meter perfectly envelopes these attributes.

Versatility

Perfect for testing the thermal conductivity of insulation, wood, foam, concrete, and other construction materials.

Simplicity

Testing with the HFM-100 can be performed with the push of a button. The collected data is automatically analyzed and results are displayed immediately.

Accuracy

The HFMM-100 boasts a reproducibility typically better than 2% and accuracy typically better than 5% the HFM-100 is on par with laboratory equipment that costs over 10x more. 

 

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample Clamp

The TLS-100 Conforms TO These INDUSTRY STANDARDS

ASTM C518

This test method provides a rapid means of determining the steady-state thermal transmission properties of thermal insulations and other materials with a high level of accuracy when the apparatus has been calibrated appropriately.

Asset 1

ISO 8301

Defines the use of the heat flow meter method to measure the steady-state heat transfer through flat slab specimens and the calculation of its heat transfer properties. Annex A forms an integral part of this standard. Annexes B, C, D and E are for information only.

Asset 2

 EN 12667

Thermal performance of building materials and products. Determination of thermal resistance by means of guarded hot plate and heat flow meter methods. Products of high and medium thermal resistance.

SAMPLE MEASUREMENT

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample

1

The Sample

The sample should be between 150 mm and 300 mm square (6 in to 12 in square), and have parallel surfaces. Sample height is automatically measured by the HFM 100; however for compressible materials, desired sample thickness can be manually entered for predetermined testing thickness.

Approximate Time: 1 minute

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample

2

Insert Sample

Place the sample between the HFM 100’s parallel testing plates.  For smaller samples or samples of differing shapes from the testing chamber, place the sample within the center of the lower plate, positioned directly over the heat flux sensor.

Approximate Time: 1 minute

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample Clamp

3

Close Plates

The top plate automatically lowers for rigid samples or to a predetermined thickness for compressible samples. For added accuracy when testing rigid samples, the top plate makes a short confirming movement for optimum contact and measurement of thickness. Additionally, this short movement will also compensate for any issue with sample flatness.

Approximate Time: 1 minute

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample Run

4

Run Experiment

A single mean temperature or steps of temperature may be selected for an automated testing routine. Testing can be performed in either quality control (20 to 30 min) or high accuracy (30 to 60 min) modes for test times which best fit your application. Once testing is complete, results can be saved, printed, or exported to Microsoft Excel for further processing.

Approximate Time: 20-60 minutes

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample

1

The Sample

The sample should be between 150 mm and 300 mm square (6 in to 12 in square), and have parallel surfaces. Sample height is automatically measured by the HFM 100; however for compressible materials, desired sample thickness can be manually entered for predetermined testing thickness.

Approximate Time: 1 minute

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample

2

Insert Sample

Place the sample between the HFM 100’s parallel testing plates.  For smaller samples or samples of differing shapes from the testing chamber, place the sample within the center of the lower plate, positioned directly over the heat flux sensor.

Approximate Time: 1 minute

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample Clamp

3

Close Plates

The top plate automatically lowers for rigid samples or to a predetermined thickness for compressible samples. For added accuracy when testing rigid samples, the top plate makes a short confirming movement for optimum contact and measurement of thickness. Additionally, this short movement will also compensate for any issue with sample flatness.

Approximate Time: 1 minute

HFM-100 Heat Flow Meter Thermal Conductivity Steps Sample Run

4

Run Experiment

A single mean temperature or steps of temperature may be selected for an automated testing routine. Testing can be performed in either quality control (20 to 30 min) or high accuracy (30 to 60 min) modes for test times which best fit your application. Once testing is complete, results can be saved, printed, or exported to Microsoft Excel for further processing.

Approximate Time: 20-60 minutes

How It Works

  • Two flux sensors for accurate measurement of thermal conductivity
  • Peltier heating / cooling plates for rapid control of temperature
  • Thickness is measured to an accuracy of 0.1 mm (0.004 in) with the use of four digital optical encoders
  • Front panel operation allows full control of all HFM functions, or use the intuitive HFM Software for basic and additional functions, such as printing and exporting
  • Plate clamping can be automated or set to a user defined thickness — ideal for compressible materials
  • Follows international standards: ASTM C518, ISO 8301, and EN 12667

The cost effective HFM 100 Heat Flow Meter instrument is an excellent choice when making steady-state thermal conductivity measurements of specimens such as insulation products and construction materials. Thermtest has rigorously engineered the heat flow meter to meet the requirements of international standards including ASTM C518, ISO 8301, and EN 12667.

Operating the HFM is straightforward — a sample is positioned between two heating – cooling plates, and the upper plate, powered by stepper motors positioned in each corner, lowers to contact the top of the sample. Plate contact with the test specimen is controlled by a standard pressure applied, or by a user defined specimen thickness. Stepper motors are controlled by individual optical encoders for measurement of sample thickness (L), to the nearest 0.1 mm (0.004 in). Integrated logic between stepper motors allows the upper plate to sense and adjust for specimens with surface variations, optimizing plate – specimen contact for measurements.

One heat flux sensor is integrated into each plate, and is used to monitor heat flux (Q/A), generated due to the difference in temperature (ΔT) between the top and bottom plate at regular intervals, until steady-state heat flux is observed. The composite heat flux is then used to calculate thermal conductivity (λ) and thermal resistance (R) according to Fourier’s Law.

HFM-100 Heat Flow Meter Thermal Conductivity Equation

Learn More About Thermtest The Heat Flow Meter (HFM)

The Thermtest Heat Flow Meter (HFM) provides users with the ability to measure thermal properties of larger, flat slab specimens ranging in thermal conductivities from 0.005 to 0.5 W/m∙K. The Heat Flow Meter is capable of measuring the steady-state heat transfer properties of foams, solids, and textiles.

Get HFM-100 Pricing

First Name *

Last Name *

Email *
Company
Phone Number *
Country *
Message *

Pin It on Pinterest