Amprobe Radiometric

Amprobe Radiometric

Radiometry is a broad field encompassing all techniques for measuring electromagnetic radiation, including the measure of visible light. These techniques measure the distribution of the radiation’s power in space. This field includes photometry, which more specifically measures attributes of electromagnetic energy that are visible to the human eye. Instruments in this category address both the broad and more specific attributes of light these fields cover.

Light Meters / Illuminance Meters

An Illuminance Meter measures how much a given incident light illuminates a surface, unlike a luminance meter, which measures the light being emitted from a particular area. Many illuminance meters do also function as luminance meters given they use certain attachments.

Illuminance is basically another word for brightnes. However the term brightness should not be used for quantitative description. Therefore we say illuminance. Today illuminance meters can effectively measure most types of visible light.

  Key Features of Light Meters / Illuminance Meters

• Measuring Modes. Some meters can measure Illuminance, illuminance difference, average illuminance, illuminance ratio, integrated illuminance, and integration time. Most other meters can measure in a maximum of five modes and many often require special attachments to measure in certain modes.
   
• Accuracy Classification. Meters are classified by DIN and JIS standards.
  • DIN classes: L, A, B, C
  • JIN classes: Precision, AA, A, B
  Class L and Precision are the highest classes in each, respectively. A higher class translates to greater accuracy. However, it will also mean a higher price.

• Illuminance Range. Most meters typically have a maximum range of 199,900 lx