Thermal Conductivity Analyser | Resment Solutions LLP

Ambient to 300 °C

A direct measurement, not a model

Transient techniques infer conductivity from how a thermal pulse propagates, which means the number you get depends on the model you fit. A steady-state measurement does something simpler and harder to argue with: establish a constant temperature difference across a specimen of known thickness, measure the heat that has to flow to maintain it, and apply Fourier's law.

Detailed photography and the full datasheet for this line are being finalised — please request certified specifications with your enquiry.

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How the measurement works

Fourier's law, made into an instrument

The specimen is clamped between a heated plate and a cooled plate. Once the system reaches steady state — constant temperatures, constant heat flux, no more transient storage — the conductivity follows directly from the measured heat flow, the specimen geometry and the temperature difference across it.

Fig. 1 — Steady-state thermal conductivity measurement. The practical difficulty is not the equation but the boundary conditions: guarding against lateral heat loss, achieving genuine thermal contact at both faces, and confirming that steady state has actually been reached rather than assumed.

What it tells you

Why laboratories measure λ

Insulation performanceDoes this material meet its declared value?

Insulation boards, refractory linings, mineral wool and foams are specified on conductivity. Measuring it on the delivered product — at temperature, not just at ambient — is how a declared R-value gets verified rather than trusted.

Temperature dependenceHow does λ change as it gets hot?

Conductivity is not a constant. Measuring across the working range up to 300 °C shows how a material behaves where it will actually be used, which for insulation and refractories is rarely at room temperature.

Formulation developmentDid that change do what we hoped?

Porosity, density, binder content and fibre orientation all move conductivity. A repeatable steady-state measurement turns formulation work into something you can iterate against rather than argue about.

Thermal managementWill this carry heat away fast enough?

For gap fillers, potting compounds, composites and thermal interface materials, conductivity is the input to every heat-dissipation calculation downstream.

Technical data

Indicative specifications

The maximum temperature is confirmed. Remaining figures are representative of a steady-state analyser of this type and are pending confirmation against the model-specific datasheet.

Measurement

Temperature range	Ambient – 300 °C (confirmed)
Method	Steady-state heat flow
Conductivity range	~0.02 – 15 W·m⁻¹·K⁻¹ (indicative)
Accuracy	±3 – 5 % of reading (indicative)
Specimen form	Solid, powder or board — dimensions to be confirmed

Tell us about the material.

Specimen form, expected conductivity and the temperature you care about determine the configuration. We will confirm certified specifications against your requirement.

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