Inertia heat flux transducers -  IHF Series

Sensors of the IHF (Inertia Heat Fluxmeters) Series are intended for fixed duration (one-shot) or cycling measurements. IHF devices are based on a principle called “thermal inertia”: a calorimetric element of well-known thermal properties (as a function of temperature) collects on its front face the incident heat flux, which is then deduced by time derivation of the measured mean temperature. IHF sensors can be declined in radiative (radiometers), convective and total fluxmeters.

- In their convection-type version, the sensitive element of the sensor is made of a highly reflecting surface treatment (emissivity <0.05) in order to suppress as far as possible radiative contribution ;

- In their radiation-type version (radiometers), the sensitive element of the sensor is isolated from the external environment by the means of a window, so as to suppress any convective contribution. Window transmissivity in characterized in our laboratory over a large spectrum. In that case, the sensitive element is made of a highly absorbing surface treatment (emissivity >0.95), also spectrally characterized ;

- In their total-type version, the sensitive element is analogous to the radiation-type version, but is directly exposed to the external environment so as to catch combined radiative-convective heat transfers. If convection can be neglected in your application, this version can be turned into a large view angle radiometer.