Thermal radiation sensor

Thermal radiation sensor is also called surface temperature sensor, radiation heat flow sensor, and thermal radiation meter. Thermal radiation sensor is an important instrument for measuring the size of thermal radiation migration in the process of thermal radiation and evaluating thermal radiation performance. It is mainly used to measure the wavelength range of 0.3 to 3 microns of total solar radiation. If it is placed horizontally downward, it can measure reflected radiation, and if it is added with a scattering shading ring, it can measure scattered radiation.

The thermal radiation sensor is composed of double-layer quartz glass cover, sensing element, shading plate, surface body, desiccant and other parts. The heart of the watch is the sensing element, which consists of a fast-responding wire-wound plated thermopile. The sensing surface is coated with 3M matte black paint. The sensing surface is a hot junction. When the sun shines, the temperature rises. It forms a thermoelectric potential with the cold junction on the other side, and the electromotive force is proportional to the intensity of solar radiation.

Test range: 0～2000W/m2

Resolution 1W/㎡

Accuracy ±5%  

Sensitivity: 7～14μV/wm-2  

Response time: ≤35 seconds (99%)  

Internal resistance: about 350Ω  

Spectral range: 0.3～3μm.

Annual stability: ±2% internal resistance about 350Ω  

Cosine response: ≤±7% (when the sun altitude angle is 10°)   

Azimuth response error: ≤5% (when the sun altitude angle is 10°)

Working environment temperature: -40℃～+50℃