Thermal Coefficient Of Materials Measurement Unit

A uni-directional heat flux is created through the test specimen, and measurements are made when the steady state is reached.

The parameters measured are those necessary for defining the heat transfer characteristics of a givmaterial :en 

• Thermal conductivity.


• Thermal diffusivity.


• Specific heat.


• Measurements can be made more rapidly than by other methods, for one
  or two samples depending on the selected configuration of the test unit
  (3 options are available).


• The units have many applications for teaching, research and industrial testing.

Tests and experiments

The measurement unit can be used to
determine the thermal coefficients of homogeneous or heterogeneous
materials and liquids, with one or two test boxes depending on the tests
to be carried out.

In the case of liquids or granular materials (powders or sand) the
samples are placed in an hermetic box, with copper plates on the upper
and lower surfaces.

Normal test temperatures are near ambient, but if required, materials
can be tested at temperatures up to 80°C. The specimen dimensions are
270 x 270 mm, with thickness varying from 30 to 70 mm.

Typical applications :

a) Laboratory experiments and students projects :

Using a twin-box system and depending on the types of boxes used.

• Simultaneous measurements of thermal conductivity, l, on materials.


• Comparison of steady-state temperature differences for two specimens.


• Studies of temperature responses to transient conditions.


• Measurements of heat transfer coefficient, K, on both faces of a specimen.


• Measurements of thermal diffusivity, a.

b) Research :

• Study of thermal characteristics of
  homogeneous and heterogeneous materials, as a function of their
  composition. Verification of theoretical models and empirical relations.


• Study of characteristics as a function of material water content.


• Evaluation of ageing effects on thermal characteristics.

c) Routine testing :

• With a twin-box unit, measurements on up
  to 6 to 8 specimens per day can be carried out. The unit is suited for
  repetitive measurements on building and insulating materials, sand,
  powders, liquids for the food industry, etc.

Technical specifications

The measurement unit comprises :

• A heavily insulated test cell maintained
  at a low temperature (approx. – 5°C) by means of a cooler through which
  passes a water-glycol solution, which is cooled by means of a cryostat.


• One or more specimen test boxes, depending on the selected configuration :
  
  for thermal conductivity measurements, the box is fitted with a flat
  heater element on its upper internal face. The heat flux is controlled
  by a rheostat. for thermal diffusivity measurements, the test box which
  has internal reflecting surfaces, is fitted with an incandescent lamp. A
  heat flux is emitted for a few seconds by means of the lamp.


• The specific heat is determined from measurements of the thermal conductivity and diffusivity.


• The cables from the temperature probes and the heater element are connected to the measurement console through a terminal box.

Equipment Package :

• Single box test unit for measurements of thermal conductivity or diffusivity.


• Complement for measurements of thermal diffusivity.


• Twin box test unit, for simultaneous measurements of thermal conductivities of two specimens or conductivity and diffusivity.


• Each unit is supplied complete with a measurement console.

Dimensions and weight

• 1200 x 1000 x 800 mm, 25 kg


• 2000 x 1000 x 800 mm, 40 kg

Essential requirements

• 220 V, single phase, 50 Hz


• 115 V on request

Shipping & Installation

We dispatch Thermal Coefficient Of Materials Measurement Unit from our Ambala Cantt manufacturing facility to destinations across 90+ countries. All shipments include comprehensive documentation, technical manuals, and a Lab Instructor Guide.

• Packaging: Export-grade wooden crate with anti-corrosion lining
• Lead Time: 4-6 weeks for standard orders, customised lead time for bulk tenders
• Installation: On-site installation and commissioning by our certified engineers (optional)
• Training: Hands-on training for instructors and lab technicians provided
• Warranty: 12-month manufacturer warranty against material and workmanship defects